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1,822 results on '"German Aerospace Center (DLR)"'

1. Spatio‐Temporal Level Variations of the Martian Seasonal North Polar Cap From Co‐Registration of MOLA Profiles

Author: Xiao, Haifeng, Stark, Alexander, Schmidt, Frédéric, Hao, Jingyan, Steinbrügge, Gregor, Wagner, Nicholas L., Su, Shu, Cheng, Yuan, Oberst, Jürgen, 2 Institute of Planetary Research German Aerospace Center (DLR) Berlin Germany, 3 Université Paris‐Saclay CNRS GEOPS Orsay France, 5 Division of Space Technology Luleå University of Technology Kiruna Space Campus Norrbotten County Sweden, 7 Department of Geophysics Stanford University Stanford CA USA, 8 Department of Geosciences Baylor University Waco TX USA, 9 College of Surveying and Geo‐Informatics Tongji University Shanghai China, and 1 Institute of Geodesy and Geoinformation Science Technische Universität Berlin Berlin Germany
Subjects: ddc:523, Geophysics, Space and Planetary Science, Geochemistry and Petrology, MOLA, Earth and Planetary Sciences (miscellaneous), Mars, Laser Altimeter, seasonal polar cap, North Polar Cap, CO2 ice, level variation, pseudo cross‐over
Abstract: The seasonal deposition and sublimation of CO2 constitute a major element in Martian volatile cycles. We reprocess the Mars Orbiter Laser Altimeter (MOLA) data and apply co‐registration procedures to obtain spatio‐temporal variations in levels of the Seasonal North Polar Cap (SNPC). The maximum level over the Residual North Polar Cap (RNPC) is 1.3 m, approximately half of that at the south pole (2.5 m). However, the maximum level in the dune fields at Olympia Undae can be up to 3.8 m. Furthermore, off‐season decreases up to 3 m during the northern winter at Olympia Undae are observed. These are likely due to metamorphism effects accentuated by the reduced snowfall at this period. Meanwhile, off‐season increases of up to 2 m during the northern spring are noted, the cause of which remains to be explored. The volume of the SNPC peaks at the end of northern winter and is estimated to be approximately 9.6 × 1012 m3, which is 2% more than that of the Seasonal South Polar Cap. The bulk density of the SNPC can go through phased decreases in accordance with phased accumulation at northern high‐latitudes. These findings can put important constraints on the Martian volatile cycling models., Plain Language Summary: Due to its axial tilt, seasons also exist on Mars. Up to one third of the atmosphere's CO2 is in annual exchange with the polar regions through seasonal deposition/sublimation processes. Here, we make use of previously proposed approaches of analyzing the Mars Orbiter Laser Altimeter profiles and obtain spatio‐temporal level variations of the Seasonal North Polar Cap (SNPC). Particularly, we bring attention to abnormal behavior of the SNPC in the dune fields at Olympia Undae. Maximum level there can be all the way up to 4 m which is much higher than a maximum of 1.5 m over the Residual North Polar Cap. Meanwhile, off‐season decreases during the northern winter with magnitudes up to 3 m and off‐season increases during the northern spring of magnitudes up to 2 m are observed. These could possibly be related to metamorphism of the seasonal deposits and phased snowfall. The maximum volume of the SNPC is constrained to be 9.6 × 1012 m3. The bulk density of the SNPC does not continuously increase as previously assumed but can go through phased decreases in accordance with phased snowfall at the north pole. These findings can put important constraints on the Martian climate models., Key Points: Through co‐registration of laser altimetry profiles, spatio‐temporal level variations of the Seasonal North Polar Cap (SNPC) of Mars are obtained. Maximum level of the SNPC can be up to 3.8 m at Olympia Undae and up to 1.3 m over the Residual North Polar Cap. Northern winter decreases of up to 3 m and northern spring increases of up to 2 m are observed at Olympia Undae., China Scholarship Council, Deutsche Forschungsgemeinschaft, Institut National des Sciences de l’Univers, Centre National de la Recherche Scientifique, Centre National d’Etudes Spatiales, https://doi.org/10.17632/x953mzxxvv.1, https://doi.org/10.17632/z59b9nd6s9.2, https://pds-geosciences.wustl.edu/missions/mgs/pedr.html, https://naif.jpl.nasa.gov/pub/naif/pds/data/mgs-m-spice-6-v1.0/mgsp_1000/data/, https://www.uahirise.org/hiwish/browse
Published: 2022

2. Determining the origin of tidal oscillations in the ionospheric transition region with EISCAT radar and global simulation data

Author: Günzkofer, F., Pokhotelov, D., Stober, G., Liu, H., Liu, H.‐L., Mitchell, N. J., Tjulin, A., Borries, C., 1 Institute for Solar‐Terrestrial Physics German Aerospace Center (DLR) Neustrelitz Germany, 2 Institute of Applied Physics & Oeschger Center for Climate Change Research, Microwave Physics University of Bern Bern Switzerland, 3 Department of Earth and Planetary Science Kyushu University Fukuoka Japan, 4 High Altitude Observatory National Center for Atmospheric Research Boulder CO USA, 5 British Antarctic Survey Cambridge UK, and 7 EISCAT Scientific Association Kiruna Sweden
Subjects: tidal oscillations, ionsopheric transition region, Geophysics, EISCAT radar campaign, Space and Planetary Science, Thermosphere-Ionosphere coupling, Incoherent Scatter Radar, ddc:538.7, Ionospheric tides
Abstract: At high‐latitudes, diurnal and semidiurnal variations of temperature and neutral wind velocity can originate both in the lower atmosphere (UV or infrared absorption) and in the thermosphere‐ionosphere (ion convection, EUV absorption). Determining the relative impact of different forcing mechanisms gives insight to the vertical coupling in the ionosphere. We analyze measurements from the incoherent scatter radar (ISR) facility operated by the EISCAT Scientific Association. They are complemented by meteor radar data and compared to global circulation models. The amplitudes and phases of tidal oscillations are determined by an adaptive spectral filter (ASF). Measurements indicate the existence of strong semidiurnal oscillations in a two‐band structure at altitudes ≲110 and ≳130 km, respectively. Analysis of several model runs with different input settings suggest the upper band to be forced in situ while the lower band corresponds to upward‐propagating tides from the lower atmosphere. This indicates the existence of an unexpectedly strong, in situ forcing mechanism for semidiurnal oscillations in the high‐latitude thermosphere. It is shown that the actual transition of tides in the altitude region between 90 and 150 km is more complex than described so far., Plain Language Summary: Solar and atmospheric variability influence the ionosphere, causing critical impacts on satellite and ground‐based infrastructure. Determining the dominant forcing mechanisms for ionosphere variability is important for prediction and mitigation of these threats. However, this is a challenging task due to the complexity of solar‐terrestrial coupling processes. Tidal oscillations (mostly 12 and 24‐hr periods) allow for a rough estimations of whether forcing from “above” or “below” dominates. The classical understanding is that 12‐hr oscillations propagate upwards from below while 24‐hr oscillations are forced at high altitudes. We analyze data from two radar systems and three global ionosphere models and show that the altitude structure of tidal oscillations is in fact more complex than classically assumed., Key Points: Twenty‐day long EISCAT radar campaign shows a complex mixture of semidiurnal and diurnal tidal oscillations. Three global circulation models show similar tidal structuring and allow to determine the influence of different forcing mechanisms. Adaptive spectral filtering (ASF) technique allows robust fitting of tidal amplitudes and phases., EISCAT, JSPS KAKENHI, DFG, https://doi.org/10.5281/zenodo.6817130, https://doi.org/10.5281/zenodo.7072141
Published: 2022

3. Martian Atmospheric Spectral End‐Members Retrieval From ExoMars Thermal Infrared (TIRVIM) Data

Author: Alemanno, G., D’Amore, M., Maturilli, A., Helbert, J., Arnold, G., Korablev, O., Ignatiev, N., Grigoriev, A., Shakun, A., Trokhimovskiy, A., 1 Institute for Planetary Research German Aerospace Center DLR Berlin Germany, 3 Space Research Institute (IKI) Moscow Russia, and 4 Australian National University Canberra ACT Australia
Subjects: Geophysics, ddc:523, Space and Planetary Science, Geochemistry and Petrology, TIRVIM data, Earth and Planetary Sciences (miscellaneous), Martian atmosphere
Abstract: Key knowledge about planetary composition can be recovered from the study of thermal infrared spectral range datasets. This range has a huge diagnostic potential because it contains diagnostic absorptions from a planetary surface and atmosphere. The main goal of this study is to process and interpret the dataset from the Thermal Infrared channel (TIRVIM) which is part of the Atmospheric Chemistry Suite of the ExoMars2016 Trace Gas Orbiter mission to find and characterize dust and water ice clouds in the atmosphere. The method employed here is based on the application of principal component analysis and target transformation techniques to extract the independent variable components present in the analyzed dataset. Spectral shapes of both atmospheric dust and water ice aerosols have been recovered from the analysis of TIRVIM data. The comparison between our results with those previously obtained on Thermal Emission Spectrometer (TES) data and with previous analysis on TIRVIM data, validates the methodology here applied, showing that it allows to correctly recover the atmospheric spectral endmembers present in the TIRVIM data. Moreover, comparison with atmospheric retrievals on PFS, TES and IRIS data, allowed us to assess the temporal stability and homogeneity of dust and water ice components in the Martian atmosphere over a time period of almost 50 years., Plain Language Summary: The analysis of thermal infrared datasets from planetary bodies is of key importance for the understanding of a planet's climate evolution and history: it contains valuable information about composition, temperature and state of the atmosphere. Moreover, surface properties and the surface‐atmosphere interaction can be studied. Here we investigated new thermal infrared data from the Thermal Infrared channel instrument of the ExoMars Trace Gas Orbiter with the main goal of carefully identifying Martian atmospheric dust and water ice clouds components. A methodology based on principal component and target transformation factor analysis techniques has been applied. Based on our results, this methodology can correctly recover both atmospheric dust and water ice aerosols spectral shapes and their abundances in the Martian atmosphere., Key Points: First successful application of principal components and target transformation techniques to high‐resolution Thermal Infrared channel (TIRVIM) data. Spectral shapes of both atmospheric dust and water ice clouds are recognized and recovered. TIRVIM data are successfully modeled through a linear combination of the recovered water ice and dust end‐members., Roscosmos and ESA, https://doi.org/10.5281/zenodo.7032738
Published: 2022

4. Multiple Angle Observations Would Benefit Visible Band Remote Sensing Using Night Lights

Author: Kyba, Christopher C. M., Aubé, Martin, Bará, Salvador, Bertolo, Andrea, Bouroussis, Constantinos A., Cavazzani, Stefano, Espey, Brian R., Falchi, Fabio, Gyuk, Geza, Jechow, Andreas, Kocifaj, Miroslav, Kolláth, Zoltán, Lamphar, Héctor, Levin, Noam, Liu, Shengjie, Miller, Steven D., Ortolani, Sergio, Jason Pun, Chun Shing, Ribas, Salvador José, Ruhtz, Thomas, Sánchez de Miguel, Alejandro, Schneider, Mathias, Shrestha, Ranjay Man, Simoneau, Alexandre, So, Chu Wing, Storch, Tobias, Tong, Kai Pong, Tuñón, Milagros, Turnshek, Diane, Walczak, Ken, Wang, Jun, Wang, Zhuosen, Zhang, Jianglong, 2 Cégep de Sherbrooke 475 rue du cégep Sherbrooke QC Canada, 3 Area de Optica Universidade de Santiago de Compostela (USC) Compostela Spain, 4 Regional Environmental Protection Agency of Veneto Via Ospedale Civile 24 Padova Italy, 5 Lighting Laboratory National Technical University of Athens Athens Greece, 6 Department of Physics and Astronomy University of Padova Padova Italy, 8 School of Physics Trinity College DublinCollege Green Dublin Ireland, 9 ISTIL ‐ Istituto di Scienza e Tecnologia dell’Inquinamento Luminoso Via Roma 13 Thiene Italy, 10 The Adler Planetarium 1300 S. Lake Shore Dr Chicago IL USA, 11 Leibniz Institute of Freshwater Ecology and Inland Fisheries Berlin Germany, 12 ICA Slovak Academy of Sciences Bratislava Slovakia, 14 Department of Physics Eszterházy Károly University Leányka út 6‐7 Eger Hungary, 16 The Department of Geography The Hebrew University of Jerusalem Mt Scopus Jerusalem Israel, 18 Spatial Sciences Institute University of Southern California Los Angeles CA USA, 19 Department of Atmospheric Science and Cooperative Institute for Research in the Atmosphere Colorado State University Fort Collins CO USA, 20 Department of Physics The University of Hong Kong Pokfulam Hong Kong, 21 Parc Astronòmic Montsec ‐ Ferrocarrils de la Generalitat de Catalunya Lleida Spain, 22 Freie Universität Berlin Berlin Germany, 23 Depto. Física de la Tierra y Astrofísica Instituto de Física de Partículas y del Cosmos (IPARCOS) Universidad Complutense Madrid Spain, 25 German Aerospace Center (DLR) Earth Observation Center (EOC) Weßling Germany, 26 Science Systems and Applications, Inc. Lanham MD USA, 28 Université de Sherbrooke 2500 Boulevard de l’Université Sherbrooke QC Canada, 1 German Research Centre for Geosciences GFZ Potsdam Germany, 29 Physics Department Carnegie Mellon University Pittsburgh PA USA, 30 Department of Chemical and Biochemical Engineering College of Engineering Iwoa City IA USA, 27 Terrestrial Information Systems Laboratory NASA Goddard Space Flight Center Greenbelt MD USA, and 32 Department of Atmospheric Sciences University of North Dakota Grand Forks ND USA
Subjects: Atmospheric Science, remote sensing, ddc:551.5, Geophysics, Space and Planetary Science, light pollution, 500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften, Earth and Planetary Sciences (miscellaneous), multi‐view, multi‐angle, artificial light at night, night lights
Abstract: The spatial and angular emission patterns of artificial and natural light emitted, scattered, and reflected from the Earth at night are far more complex than those for scattered and reflected solar radiation during daytime. In this commentary, we use examples to show that there is additional information contained in the angular distribution of emitted light. We argue that this information could be used to improve existing remote sensing retrievals based on night lights, and in some cases could make entirely new remote sensing analyses possible. This work will be challenging, so we hope this article will encourage researchers and funding agencies to pursue further study of how multi‐angle views can be analyzed or acquired., Plain Language Summary: When satellites take images of Earth, they usually do so from directly above (or as close to it as is reasonably possible). In this comment, we show that for studies that use imagery of Earth at night, it may be beneficial to take several images of the same area at different angles within a short period of time. For example, different types of lights shine in different directions (street lights usually shine down, while video advertisements shine sideways), and tall buildings can block the view of a street from some viewing angles. Additionally, since views from different directions pass through different amounts of air, imagery at multiple angles could be used to obtain information about Earth's atmosphere, and measure artificial and natural night sky brightness. The main point of the paper is to encourage researchers, funding agencies, and space agencies to think about what new possibilities could be achieved in the future with views of night lights at different angles., Key Points: Remote sensing using the visible band at night is more complex than during the daytime, especially due to the variety of artificial lights. Views of night lights intentionally taken from multiple angles provide several advantages over near‐nadir or circumstantial view geometries. Night lights remote sensing would benefit from greater consideration of the role viewing geometry plays in the observed radiance., EC H2020 H2020 Societal Challenges http://dx.doi.org/10.13039/100010676, Helmholtz Association http://dx.doi.org/10.13039/501100009318, Slovak Research and Development Agency, Xunta de Galicia (Regional Government of Galicia) http://dx.doi.org/10.13039/501100010801, National Aeronautics and Space Administration http://dx.doi.org/10.13039/100000104, University of Hong Kong http://dx.doi.org/10.13039/501100003803, Fonds de recherche du Québec, EC Emprego, Assuntos Sociais e Inclusão European Social Fund http://dx.doi.org/10.13039/501100004895, Natural Environment Research Council http://dx.doi.org/10.13039/501100000270, City of Cologne, Germany
Published: 2022

5. Extending access to localizer performance with vertical guidance approaches by means of an SBAS to GBAS converter

Author: Dautermann, Thomas, Ludwig, Thomas, Geister, Robert, Ehmke, Lutz, and Institute of Flight Guidance, German Aerospace Center (DLR), Brunswick, Germany
Subjects: Service (systems architecture), Data collection, Localizer performance with vertical guidance, GNSS augmentation, GNSS, Computer science, GPS, GBAS, Real-time computing, GLASS, Augmentation, ddc:526, Navigation, Data link, Technical feasibility, SBAS, Satellite, Assisted GPS, General Earth and Planetary Sciences, Converter, Aviation
Abstract: Currently, many commercial airline aircraft cannot perform three-dimensionally guided approaches based on satellite-based augmentation systems. We propose a system to rebroadcast the correction and integrity data via a data link as provided by the ground-based augmentation system such that aircraft equipped with a GPS landing system (GLS) can use the wide-area corrections and perform localizer performance with vertical guidance (LPV) approaches while maintaining the same level of integrity. In consequence, the system loses some availability and the time to alert is slightly increased. We build a prototype system and present data collected for one week, confirming technical feasibility. There is a loss of 5.3 percent of availability during a 1-week data collection cycle in which we compared our system to standalone LPV service. We tested our prototype with two commercially available GLS receivers with positive results and successfully demonstrated the functionality with a conventional Airbus 319 equipped with a standard GLS receiver.
Published: 2020

6. Robust Variational-Based Kalman Filter for Outlier Rejection With Correlated Measurements

Author: Jordi Vila-Valls, Daniel Medina, Haoqing Li, Pau Closas, Northeastern University [Boston], German Aerospace Center (DLR), Département Electronique, Optronique et Signal (DEOS), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO), Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE), German Aerospace Center - DLR (GERMANY), Northeastern University (USA), Département d'Electronique, Optronique et Signal - DEOS (Toulouse, France), and Chouzenoux, Emilie
Subjects: [SPI.OTHER]Engineering Sciences [physics]/Other, Noise measurement, Computer science, Gaussian, Correlated measurements, 020206 networking & telecommunications, 02 engineering and technology, Kalman filter, Robust filtering, Heavy-tailed noise, Nautische Systeme, Data modeling, Nonlinear system, symbols.namesake, Autre, Signal Processing, Outlier, 0202 electrical engineering, electronic engineering, information engineering, Task analysis, symbols, Outliers, Electrical and Electronic Engineering, Variational Bayes, Algorithm
Abstract: International audience; State estimation is a fundamental task in many engineering fields, and therefore robust nonlinear filtering techniques able to cope with misspecified, uncertain and/or corrupted models must be designed for real-life applicability. In this contribution we explore nonlinear Gaussian filtering problems where measurements may be corrupted by outliers,and propose a new robust variational-based filtering methodology able to detect and mitigate their impact. This method generalizes previous contributions to the case of multiple outlier indicators for both independent and dependent observation models. An illustrative example is provided to support the discussion and show the performance improvement.
Published: 2021

7. Cramér-Rao bound for a mixture of real- and integer-valued parameter vectors and its application to the linear regression model

Author: Jordi Vila-Valls, Daniel Medina, Eric Chaumette, François Vincent, Pau Closas, Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE), German Aerospace Center - DLR (GERMANY), DLR Institute of Communications and Navigation (GERMANY), Northeastern University (USA), Département d'Electronique, Optronique et Signal - DEOS (Toulouse, France), DLR Institute of Communications and Navigation [Neustrelitz], German Aerospace Center (DLR), Département Electronique, Optronique et Signal (DEOS), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO), and Northeastern University [Boston]
Subjects: [SPI.OTHER]Engineering Sciences [physics]/Other, Mean squared error, Mixed real-integer parameter vector estimation, Gaussian, 02 engineering and technology, Upper and lower bounds, symbols.namesake, Autre, Linear regression, 0202 electrical engineering, electronic engineering, information engineering, Applied mathematics, Electrical and Electronic Engineering, McAulay-Seidman bound, Mathematics, GNSS, Covariance matrix, Estimator, Ambiguity resolution, 020206 networking & telecommunications, Expression (mathematics), Mixed real- integer parameter vector estimation, Control and Systems Engineering, Signal Processing, symbols, 020201 artificial intelligence & image processing, Computer Vision and Pattern Recognition, GNSS Ambiguity resolution, Cramér–Rao bound, Software, Cramér-Rao bound
Abstract: International audience; Performance lower bounds are known to be a fundamental design tool in parametric estimation theory. A plethora of deterministic bounds exist in the literature, ranging from the general Barankin bound to the well-known Cramér-Rao bound (CRB), the latter providing the optimal mean square error performance of locally unbiased estimators. In this contribution, we are interested in the estimation of mixed real- and integer-valued parameter vectors. We propose a closed-form lower bound expression leveraging on the general CRB formulation, being the limiting form of the McAulay-Seidman bound. Such formulation is the key point to take into account integer-valued parameters. As a particular case of the general form, we provide closed-form expressions for the Gaussian observation model. One noteworthy point is the as- sessment of the asymptotic efficiency of the maximum likelihood estimator for a linear regression model with mixed parameter vectors and known noise covariance matrix, thus complementing the rather rich literature on that topic. A representative carrier-phase based precise positioning example is provided to support the discussion and show the usefulness of the proposed lower bound.
Published: 2021

8. Doppler-aided positioning in GNSS receivers - A performance analysis

Author: Jordi Vila-Valls, Olivier Besson, François Vincent, Daniel Medina, Eric Chaumette, Département Electronique, Optronique et Signal (DEOS), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO), DLR Institute of Communications and Navigation [Neustrelitz], German Aerospace Center (DLR), Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE), German Aerospace Center - DLR (GERMANY), and DLR Institute of Communications and Navigation (GERMANY)
Subjects: Computer science, Real-time computing, Fisher information matrix, 02 engineering and technology, symbols.namesake, Position (vector), 0202 electrical engineering, electronic engineering, information engineering, Waveform, Traitement du signal et de l'image, Electrical and Electronic Engineering, GNSS Positioning, Cramér-Rao Bound, GNSS, Harsh Propagation conditions, Multilateration, 020206 networking & telecommunications, Fisher Information Matrix, High-sensitivity, Nautische Systeme, Control and Systems Engineering, GNSS applications, Signal Processing, symbols, 020201 artificial intelligence & image processing, Satellite, Computer Vision and Pattern Recognition, Harsh propagation conditions, Doppler effect, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Software, Positioning, Cramér-Rao bound
Abstract: International audience; The main objective of Global Navigation Satellite Systems (GNSS) is to precisely locate a receiver based on the reception of radio-frequency waveforms broadcasted by a set of satellites. Given delayed and Doppler shifted replicas of the known transmitted signals, the most widespread approach consists in a two-step algorithm. First, the delays and Doppler shifts from each satellite are estimated independently, and sub- sequently the user position and velocity are computed as the solution to a Weighted Least Squares (WLS) problem. This second step conventionally uses only delay measurements to determine the user position, although Doppler is also informative. The goal of this paper is to provide simple and meaningful ex- pressions of the positioning precision. These expressions are analysed with respect to the standard WLS algorithms, exploiting the Doppler information or not. We can then evaluate the performance improve- ment brought by a joint frequency and delay positioning procedure. Numerical simulations assess that using Doppler information is indeed effective when considering long observation times, and particularly useful in challenging scenarios such as urban canyons (constrained satellite visibility) or near indoor sit- uations (weak signal conditions which need long integration times), thus providing new insights for the design of robust and high-sensitivity receivers.
Published: 2020

9. On the Recursive Joint Position and Attitude Determination in Multi-Antenna GNSS Platforms

Author: Medina, Daniel, Vilà-Valls, Jordi, Heßelbarth, Anja, Ziebold, Ralf, García, Jesús, Kovacevic, Milica, German Aerospace Center (DLR), Universidad Carlos III de Madrid [Madrid] (UC3M), Département Electronique, Optronique et Signal (DEOS), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO), Technische Universität Dresden = Dresden University of Technology (TU Dresden), Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE), German Aerospace Center - DLR (GERMANY), Technische Universität Dresden - TUD (GERMANY), Universidad Carlos III de Madrid - UC3M (SPAIN), and Département d'Electronique, Optronique et Signal - DEOS (Toulouse, France)
Subjects: Informática, [SPI.OTHER]Engineering Sciences [physics]/Other, Autre, GNSS, quaternion rotation, Science, attitude determination, Attitude determination, RTK positioning, Kalman filtering, Quaternion rotation, Nautische Systeme
Abstract: International audience; Global Navigation Satellite Systems’ (GNSS) carrier phase observations are fundamental in the provision of precise navigation for modern applications in intelligent transport systems. Differential precise positioning requires the use of a base station nearby the vehicle location, while attitude determination requires the vehicle to be equipped with a setup of multiple GNSS antennas. In the GNSS context, positioning and attitude determination have been traditionally tackled in a separate manner, thus losing valuable correlated information, and for the latter only in batch form. The main goal of this contribution is to shed some light on the recursive joint estimation of position and attitude in multi-antenna GNSS platforms. We propose a new formulation for the joint positioning and attitude (JPA) determination using quaternion rotations. A Bayesian recursive formulation for JPA is proposed, for which we derive a Kalman filter-like solution. To support the discussion and assess the performance of the new JPA, the proposed methodology is compared to standard approaches with actual data collected from a dynamic scenario under the influence of severe multipath effects.
Published: 2020

10. Compact CRB for delay, Doppler, and phase estimation – application to GNSS SPP and RTK performance characterisation

Author: Jordi Vila-Valls, François Vincent, Daniel Medina, Pau Closas, Eric Chaumette, Lorenzo Ortega, Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE), German Aerospace Center - DLR (GERMANY), DLR Institute of Communications and Navigation (GERMANY), Northeastern University (USA), DLR Institute of Communications and Navigation [Neustrelitz], German Aerospace Center (DLR), Northeastern University [Boston], Département Electronique, Optronique et Signal (DEOS), and Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)
Subjects: RTK, Computer science, 02 engineering and technology, Signal, symbols.namesake, Narrowband, Position (vector), Global Positioning System, 0202 electrical engineering, electronic engineering, information engineering, Astrophysics::Solar and Stellar Astrophysics, Traitement du signal et de l'image, Electrical and Electronic Engineering, Signal sampling, GNSS, Satellite navigation, Phase estimation, Estimator, 020206 networking & telecommunications, Carrier Phase, Maximum likelihood estimation, CRB, Nautische Systeme, GNSS applications, Baseband, symbols, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Doppler effect, Algorithm
Abstract: International audience; The derivation of tight estimation lower bounds is a key tool to design and assess the performance of new estimators. In this contribution, first, the authors derive a new compact Cramér–Rao bound (CRB) for the conditional signal model, wherethe deterministic parameter's vector includes a real positive amplitude and the signal phase. Then, the resulting CRB is particularised to the delay, Doppler, phase, and amplitude estimation for band-limited narrowband signals, which are found in aplethora of applications, making such CRB a key tool of broad interest. This new CRB expression is particularly easy to evaluate because it only depends on the signal samples, then being straightforward to evaluate independently of the particular baseband signal considered. They exploit this CRB to properly characterise the achievable performance of satellite-based navigation systems and the so-called real-time kinematics (RTK) solution. To the best of the authors’ knowledge, this is the first time these techniques are theoretically characterised from the baseband delay/phase estimation processing to position computation, in terms of the CRB and maximum-likelihood estimation.
Published: 2020

11. Neutron diffraction and thermoelectric properties of indium filled In x Co 4 Sb 12 ( x=0.05, 0.2) and indium cerium filled Ce 0.05 In 0.1 Co 4 Sb 12 skutterudites: Neutron diffraction and thermoelectric properties of In/Ce skutterudites

Author: Mueller, Eckhard [German Aerospace Center (DLR), Koln (Germany); Justus Liebig Univ., Giessen (Germany)]
Published: 2015
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12. Positioning Performance Limits of GNSS Meta-Signals and HO-BOC Signals

Author: Jordi Vila-Valls, Eric Chaumette, Daniel Medina, François Vincent, Lorenzo Ortega, Centre National d'Études Spatiales - CNES (FRANCE), Ecole Nationale de l'Aviation Civile - ENAC (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE), Collins Aerospace (FRANCE), Thales (FRANCE), Télécom Paris (FRANCE), Direction Générale de l’Aviation Civile - DGAC (FRANCE), German Aerospace Center - DLR (GERMANY), DLR Institute of Communications and Navigation (GERMANY), Département d'Electronique, Optronique et Signal - DEOS (Toulouse, France), Télécommunications Spatiales et Aéronautiques - Telecommunications for Space ant Aeronautics (TéSA), Laboratoire de recherche coopératif dans les télécommunications spatiales et aéronautiques (TESA), DLR Institute of Communications and Navigation [Neustrelitz], German Aerospace Center (DLR), Département Electronique, Optronique et Signal (DEOS), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO), and Telecom ParisTech (FRANCE)
Subjects: High-order BOC signals, 010504 meteorology & atmospheric sciences, Computer science, Satellite constellation, 02 engineering and technology, time-delay and phase ML estimation, lcsh:Chemical technology, 01 natural sciences, Biochemistry, Article, precise positioning, Analytical Chemistry, symbols.namesake, SPP and RTK positioning, 0202 electrical engineering, electronic engineering, information engineering, Electronic engineering, Galileo (satellite navigation), Traitement du signal et de l'image, GNSS meta-signals, lcsh:TP1-1185, Electrical and Electronic Engineering, Precise positioning, Instrumentation, 0105 earth and related environmental sciences, Time-delay and phase ML estimation, SPP and RTKpositioning, GNSS, 020206 networking & telecommunications, high-order BOC signals, Atomic and Molecular Physics, and Optics, Nautische Systeme, GNSS applications, Binary offset carrier modulation, Cramér–Rao bound, Baseband, symbols, Satellite, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, Cramér-Rao bound
Abstract: Global Navigation Satellite Systems (GNSS) are the main source of position, navigation, and timing (PNT) information and will be a key player in the next-generation intelligent transportation systems and safety-critical applications, but several limitations need to be overcome to meet the stringent performance requirements. One of the open issues is how to provide precise PNT solutions in harsh propagation environments. Under nominal conditions, the former is typically achieved by exploiting carrier phase information through precise positioning techniques, but these methods are very sensitive to the quality of phase observables. Another option that is gaining interest in the scientific community is the use of large bandwidth signals, which allow obtaining a better baseband resolution, and therefore more precise code-based observables. Two options may be considered: (i) high-order binary offset carrier (HO-BOC) modulations or (ii) the concept of GNSS meta-signals. In this contribution, we assess the time-delay and phase maximum likelihood (ML) estimation performance limits of such signals, together with the performance translation into the position domain, considering single point positioning (SPP) and RTK solutions, being an important missing point in the literature. A comprehensive discussion is provided on the estimators&rsquo, behavior, the corresponding ML threshold regions, the impact of good and bad satellite constellation geometries, and final conclusions on the best candidates, which may lead to precise solutions under harsh conditions. It is found that if the receiver is constrained by the receiver bandwidth, the best choices are the L1-M or E6-Public Regulated Service (PRS) signals. If the receiver is able to operate at 60 MHz, it is recommended to exploit the full-bandwidth Galileo E5 signal. In terms of robustness and performance, if the receiver can operate at 135 MHz, the best choice is to use the GNSS meta-signals E5 + E6 or B2 + B3, which provide the best overall performances regardless of the positioning method used, the satellite constellation geometry, or the propagation conditions.
Published: 2020

13. Robust Statistics for GNSS Positioning under Harsh Conditions: A Useful Tool?

Author: Haoqing Li, Jordi Vila-Valls, Pau Closas, Daniel Medina, DLR Institute of Communications and Navigation [Neustrelitz], German Aerospace Center (DLR), Northeastern University [Boston], Département Electronique, Optronique et Signal (DEOS), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO), Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE), German Aerospace Center - DLR (GERMANY), Northeastern University (USA), and Département d'Electronique, Optronique et Signal - DEOS (Toulouse, France)
Subjects: 010504 meteorology & atmospheric sciences, Computer science, Gaussian, Robust statistics, 02 engineering and technology, single point positioning (SPP), computer.software_genre, Single point positioning, 01 natural sciences, Biochemistry, Article, Analytical Chemistry, Robust regression, symbols.namesake, Multipath, 0202 electrical engineering, electronic engineering, information engineering, Traitement du signal et de l'image, Electrical and Electronic Engineering, Instrumentation, 0105 earth and related environmental sciences, [STAT.AP]Statistics [stat]/Applications [stat.AP], GNSS, 020206 networking & telecommunications, Atomic and Molecular Physics, and Optics, Nautische Systeme, Noise, GNSS applications, Outlier, Parametric model, symbols, global navigation satellite systems (GNSS), Satellite, Data mining, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, computer, Multipath propagation
Abstract: International audience; Navigation problems are generally solved applying least-squares (LS) adjustments. Techniques based on LS can be shown to perform optimally when the system noise is Gaussian distributed and the parametric model is accurately known. Unfortunately, real world problems usually contain unexpectedly large errors, so-called outliers, that violate the noise model assumption, leading to a spoiled solution estimation. In this work, the framework of robust statistics is explored to provide robust solutions to the global navigation satellite systems (GNSS) single point positioning (SPP) problem. Considering that GNSS observables may be contaminated by erroneous measurements, we survey the most popular approaches for robust regression (M-, S-, and MM-estimators) and how they can be adapted into a general methodology for robust GNSS positioning. We provide both theoretical insights and validation over experimental datasets, which serves in discussing the robust methods in detail.
Published: 2019

14. Philae Landing on Comet 67P/Churyumov-Gerasimenko – Planned Chirality Measurements and Ideas for the Future

Author: Ulamec, Stephan, Goesmann, Fred, Meierhenrich, Uwe J., German Aerospace Center (DLR), Max Planck Institute for Solar System Research (MPS), Max-Planck-Gesellschaft, Institut de Chimie de Nice (ICN), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), German Aerospace Center ( DLR ), Max Planck Institute for Solar System Research ( MPS ), Laboratoire de Chimie des Molécules Bioactives et des Arômes ( LCMBA ), Centre National de la Recherche Scientifique ( CNRS ), Ulamec, Stephan, and Laboratoire de Chimie des Molécules Bioactives et des Arômes (LCMBA)
Subjects: 010504 meteorology & atmospheric sciences, COSAC, [SPI] Engineering Sciences [physics], [ SDU.OTHER ] Sciences of the Universe [physics]/Other, Arts, 01 natural sciences, Philae, Nutzerzentrum für Weltraumexperimente (MUSC), [SDU] Sciences of the Universe [physics], Symmetry, [SPI]Engineering Sciences [physics], [SDU]Sciences of the Universe [physics], Asymmetry measures, 0103 physical sciences, Most scalene triangle, Rosetta, Comets, [SDU.OTHER] Sciences of the Universe [physics]/Other, Chirality, [SDU.OTHER]Sciences of the Universe [physics]/Other, 010303 astronomy & astrophysics, [ SDU ] Sciences of the Universe [physics], 0105 earth and related environmental sciences
Abstract: International audience; Philae is a comet Lander, part of the ESA Rosetta Mission to comet 67P/Churyumov-Gerasimenko. After a ten year cruise through the solar system it successfully landed on the nucleus of the comet on November 12, 2014. Philae's payload consists of ten scientific instruments, including COSAC, an evolved gas analyser with the capability to differentiate chiral molecules. After the touchdown of Philae, the anchoring harpoons, which were expected to fix the lander to ground, did not work, Philae bounced in the low gravity environment, and only came to rest after a 2 hours " hop " in an unforeseen area on the comet surface. Although, the scientific instruments, including cameras, mass spectrometers (including the one of COSAC), a magnetometer and a radar instrument could be operated, and fascinating, unprecedented scientific results were obtained, it was not possible to collect a sample of the surface material and no gas chromatography measurement could be performed. Thus, the measurement of the chirality of molecules on comets is still to be done in the future. The paper gives an overview of the Philae mission and the attempts to measure chiral molecules with COSAC, and suggests future measurements with returned samples from the primitive asteroids (162173) Ryugu and (101955) Bennu with the spacecraft Hayabusa 2 (JAXA) and OSIRIS-REx (NASA), respectively. Both will reach their targets in 2018.
Published: 2018

15. Experimental evidence of near-wall reverse flow events in a zero pressure gradient turbulent boundary layer

Author: Andreas Schröder, Jean-Marc Foucaut, Julio Soria, Janos Agocs, Anni Röse, C. Cuvier, Rainer Hain, Jean-Philippe Laval, Reinhard Geisler, Omid Amili, Christian J. Kähler, Sven Scharnowski, Christian Willert, Callum Atkinson, Michel Stanislas, Joachim Klinner, S. Srinath, German Aerospace Center [DLR], Laboratoire de Mécanique des Fluides de Lille – Kampé de Fériet - UMR 9014 [LMFL], Monash University [Clayton], Universität der Bundeswehr München [Neubiberg], German Aerospace Center (DLR), Laboratoire de Mécanique de Lille - FRE 3723 (LML), Université de Lille, Sciences et Technologies-Centrale Lille-Centre National de la Recherche Scientifique (CNRS), University of Minnesota [Twin Cities] (UMN), University of Minnesota System, Institute for Fluidmechanics and Aerodynamics (IFA), Deutsches Inst. Kautschuktechnologie, German Aerospace Centre (DLR), Institute of Aerodynamics & Flow Technology, and Université de Lille, Sciences et Technologies-Ecole Centrale de Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)
Subjects: General Chemical Engineering, Bubble, Aerospace Engineering, 01 natural sciences, 010305 fluids & plasmas, Physics::Fluid Dynamics, 010309 optics, symbols.namesake, [SPI]Engineering Sciences [physics], 0103 physical sciences, Triebwerksmesstechnik, Experimentelle Verfahren, GO, Shear stress, Data_FILES, Pressure gradient, ComputingMilieux_MISCELLANEOUS, Fluid Flow and Transfer Processes, Physics, [PHYS]Physics [physics], Turbulence, Mechanical Engineering, [SPI.FLUID]Engineering Sciences [physics]/Reactive fluid environment, Reynolds number, Mechanics, Particle image velocimetry Turbulence statistics Boundary layer Flow reversal Wall shear stress, Boundary layer, Nuclear Energy and Engineering, Particle image velocimetry, Flow (mathematics), symbols
Abstract: This study reports on experimentally observed rare near-wall reverse flow events in a fully developed turbulent flat plate boundary layer at zero pressure gradient with Reynolds numbers between Re θ ≈ 2500 and Re θ ≈ 8000 ( Re τ ≈ 800 – 2400 ). The reverse flow events are captured using high magnification particle image velocimetry sequences with record lengths varying from 50 000 to 126 000 samples. Time resolved particle image sequences allow singular reverse flow events to be followed over several time steps whereas long records of nearly statistically independent samples provide a variety of single snapshots at a higher spatial resolution. The probability of occurrence lies in the order of 0.012–0.018% which matches predictions from direct numerical simulations (DNS). The typical size of the reverse flow bubble is about 30 wall units in length and 5 wall units in height which agrees well with similar observations made in existing DNS data.
Published: 2017

16. Solver comparison for Poisson-like equations on tokamak geometries

Author: Bourne, Emily, Leleux, Philippe, Kormann, Katharina, Kruse, Carola, Grandgirard, Virginie, Güclü, Yaman, Kühn, Martin Joachim, Rüde, Ulrich, Sonnendrücker, Eric, Zoni, Edoardo, CEA Cadarache, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre de Recherches en Cancérologie de Toulouse (CRCT), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique (CERFACS), Ruhr-Universität Bochum, Fakultät für Mathematik, Universitätsstr. 150, 44801 Bochum, Germany, Ruhr-Universität Bochum [Bochum], Max-Planck-Institut für Plasmaphysik [Garching] (IPP), German Aerospace Center (DLR), Department Mathematik [Erlangen], Friedrich-Alexander Universität Erlangen-Nürnberg (FAU), Technische Universität Munchen - Université Technique de Munich [Munich, Allemagne] (TUM), Lawrence Berkeley National Laboratory [Berkeley] (LBNL), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), CERFACS [Toulouse], Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique - CERFACS (CERFACS), and Bourne, Emily
Subjects: Numerical Analysis, multigrid scheme, Physics and Astronomy (miscellaneous), plasma simulation, finite differences, Applied Mathematics, [MATH.MATH-NA] Mathematics [math]/Numerical Analysis [math.NA], Poisson equation, Computer Science Applications, Computational Mathematics, [MATH.MATH-MP]Mathematics [math]/Mathematical Physics [math-ph], [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], [PHYS.PHYS.PHYS-PLASM-PH] Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], Modeling and Simulation, finite elements, conjugate gradient, [MATH.MATH-MP] Mathematics [math]/Mathematical Physics [math-ph], tokamak, [MATH.MATH-NA]Mathematics [math]/Numerical Analysis [math.NA], finite volumes
Abstract: The solution of Poisson-like equations defined on complex geometry is required for gyrokinetic simulations, which are important for the modelling of plasma turbulence in nuclear fusion devices such as the ITER tokamak. In this paper, we compare three solvers capable of solving this problem, in terms of the accuracy of the solution, and their computational efficiency. The first, the Spline FEM solver, uses C 1 polar splines to construct a finite elements method which solves the equation on curvilinear coordinates. The resulting linear system is solved using a conjugate gradient method. The second, the GmgPolar solver, uses a symmetric finite differences method to discretise the differential equation. The resulting linear system is solved using a tailored geometric multigrid scheme, with a combination of zebra circle and radial line smoothers, together with an implicit extrapolation scheme. The third, the Embedded Boundary solver, uses a finite volumes method on Cartesian coordinates with an embedded boundary scheme. The resulting linear system is solved using a multigrid scheme. The Spline FEM solver is shown to be the most accurate. The GmgPolar solver is shown to use the least memory. The Embedded Boundary solver is shown to be the fastest in most cases. All three solvers are shown to be capable of solving the equation on a realistic non-analytical geometry. The Embedded Boundary solver is additionally used to attempt to solve an X-point geometry, highlighting the problems with concave boundaries.
Published: 2023

17. Co-designing versatile quadruped robots for dynamic and energy-efficient motions

Author: Fadini, Gabriele, Kumar, Shivesh, Kumar, Rohit, Flayols, Thomas, Prete, Andrea, Carpentier, Justin, Souères, Philippe, Équipe Mouvement des Systèmes Anthropomorphes (LAAS-GEPETTO), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), Université Toulouse III - Paul Sabatier (UT3), Deutsches Forschungszentrum für Künstliche Intelligenz GmbH = German Research Center for Artificial Intelligence (DFKI), University of Trento [Trento], Inria de Paris, Institut National de Recherche en Informatique et en Automatique (Inria), Département d'informatique - ENS Paris (DI-ENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS), M-RoCK (FKZ 01IW21002) project funded by the German Aerospace Center (DLR) with federal funds from the Federal Ministry of Education and Research, ANR-10-EQPX-4401,ROBOTEX 2.0,ANR-10-EQPX-44-01, ANR-21-ESRE-0015,TIRREX,Infrastructure technologique pour la recherche d'excellence en robotique(2021), ANR-19-P3IA-0001,PRAIRIE,PaRis Artificial Intelligence Research InstitutE(2019), and European Project: 101070165,AGIMUS
Subjects: Methods and Tools for Robot System Design Optimization and Optimal Control Simulation and Animation Mechanism Design, Mechanism Design, Methods and Tools for Robot System Design, Simulation and Animation, Optimization and Optimal Control, [INFO.INFO-RB]Computer Science [cs]/Robotics [cs.RO], [PHYS.MECA.GEME]Physics [physics]/Mechanics [physics]/Mechanical engineering [physics.class-ph], [MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC]
Abstract: This paper presents a bi-level optimization framework to concurrently optimize a quadruped hardware and control policies for achieving dynamic cyclic behaviors. The longterm vision to drive the design of dynamic and efficient robots by means of computational techniques is applied to improve the development of a new quadruped prototype. The scale of the robot and its actuators are optimized for energy efficiency considering a complete model of the motor, that includes friction, torque, and bandwidth limitations. This model is used to optimize the power consumption during bounding and backflip tasks and is validated by tracking the output trajectories on the first prototype iteration. The co-design results show an improvement of up to 87% for a single task optimization. It appears that, for jumping forward, robots with longer thighs perform better, while for backflips, longer shanks are better suited. To understand the trade-off between these different choices, a Pareto set is constructed to guide the design of the next prototype.
Published: 2023

18. A Social Sciences and Humanities research agenda for transport and mobility in Europe: key themes and 100 research questions

Author: Ryghaug, Marianne, Subotički, Ivana von Wirth, Timo, Smeds, Emilia, Scherrer, Aline, Foulds, Chris, Robison, Rosie Bertolini Luca and Beyazit İnce, Eda, Brand, Ralf, Cohen-Blankshtain, Galit and Dijk, Marc and Freudendal-Pedersen, Malene and Gössling, Stephan and Guzik, Robert and Kivimaa, Paula and Klöckner, Christian and Nikolova, Hristina Lazarova and Lis, Aleksandra and Marquet, Oriol and Milakis, Dimitris and Mladenović, Milos and Mom, Gijs and Mullen, Caroline, Ortar, Nathalie, Pucci, Paola, Oliveira, Catarina Sales and Schwanen, Tim and Tuvikene, Tauri and Wentland, Alexander, RS: GSBE Studio Europa Maastricht, RS: GSBE MSI, Maastricht Sustainability Institute, Publica, Norwegian University of Science and Technology, University of Westminster, Erasmus University Rotterdam, Fraunhofer Institute, Anglia Ruskin University, University of Amsterdam, Istanbul Technical University, Rupprecht Consult GmbH, Hebrew University of Jerusalem, Maastricht University, Aalborg University, Lund University, Jagiellonian University, Finnish Environment Institute, University of National and World Economy of Sofia, Adam Mickiewicz University Poznan, Autonomous University of Barcelona, German Aerospace Center (DLR), Department of Built Environment, Eindhoven University of Technology, University of Leeds, Université de Lyon, Politecnico di Milano, University of Beira Interior, University of Oxford, Tallinn University, University of Munich, Aalto-yliopisto, Aalto University, Norwegian University of Science and Technology (NTNU), Laboratoire Aménagement Économie Transports (LAET), Université Lumière - Lyon 2 (UL2)-École Nationale des Travaux Publics de l'État (ENTPE)-Centre National de la Recherche Scientifique (CNRS), and European Project: 826025,Energy Shift
Subjects: Sustainable mobility, Horizon scan, sustainable mobility, funding, research agenda, Research agenda, Transportation, [SHS]Humanities and Social Sciences, Transport policy, horizon scan, transport policy, sustainable mobility, funding, research agenda, horizon scan, transport policy, Reseach Agenda, Funding
Abstract: International audience; Transport and mobility systems need to be transformed to meet climate change goals and reduce negative environmental and social effects. Despite EU policies having targeted such problems for more than three decades, transitions have been slow and geographically uneven. For effective change to happen, transport and mobility research needs fresh perspectives and better integration of knowledge from the Social Sciences and Humanities. Based on a Horizon Scanning approach, which allowed for a great deal of openness and variety in scholarly viewpoints, this paper presents a novel research agenda consisting of 8 themes and 100 research questions that may contribute to achieving environmentally sustainable mobility transitions within Europe. This research agenda highlights the need to not only support technological solutions for low-carbon mobility, but the importance of transformative policies that include new processes of knowledge production, civic participation and epistemic justice. We contend that the agenda points to the need for further research on the dynamics of science-society interactions.
Published: 2023

19. Innovation Paths for Machine Learning in Robotics [Industry Activities]

Author: Freek Stulp, Michael Spranger, Kim Listmann, Stéphane Doncieux, Moritz Tenorth, George Konidaris, Pieter Abbeel, German Aerospace Center (DLR), Sony AI, Tokyo, Bender GmbH, Institut des Systèmes Intelligents et de Robotique (ISIR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Magazino GmbH, Brown University, University of California (UC), and European Project: 951992
Subjects: [INFO.INFO-LG]Computer Science [cs]/Machine Learning [cs.LG], Control and Systems Engineering, [INFO.INFO-RB]Computer Science [cs]/Robotics [cs.RO], Electrical and Electronic Engineering, Computer Science Applications
Abstract: International audience; Presents interviews conducted with robotics engineers discussing advances in artificial intelligence, with particular use in machine learning. Advances in artificial intelligence (AI), especially in machine learning (ML), are changing the business models of many companies, and creating entirely new ones. Recent research estimates that AI could boost profitability rates by 38% worldwide, leading to an economic boost of €12 trillion across a variety of industries by 2035. This immense number is an accumulation of many smaller numbers, related to the successful deployment of ML at individual companies, including smalland medium-sized enterprises (SMEs) and start-ups.
Published: 2022

20. Potential of X-band polarimetric synthetic aperture radar co-polar phase difference for arctic snow depth estimation

Author: Joëlle Voglimacci-Stephanopoli, Anna Wendleder, Hugues Lantuit, Alexandre Langlois, Samuel Stettner, Andreas Schmitt, Jean-Pierre Dedieu, Achim Roth, Alain Royer, Université de Sherbrooke (UdeS), Centre d'Etudes Nordiques (CEN), Université Laval [Québec] (ULaval), German Aerospace Center (DLR), University of Applied Sciences [Munich], Institut des Géosciences de l’Environnement (IGE), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), and Université Grenoble Alpes (UGA)
Subjects: [SDE.IE]Environmental Sciences/Environmental Engineering, hoar fraction, co-polar phase difference, [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology, snow depth, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, TerraSAR-X, SAR, Canadian Arctic, Earth-Surface Processes, Water Science and Technology
Abstract: Changes in snowpack associated with climatic warming has drastic impacts on surface energy balance in the cryosphere. Yet, traditional monitoring techniques, such as punctual measurements in the field, do not cover the full snowpack spatial and temporal variability, which hampers efforts to upscale measurements to the global scale. This variability is one of the primary constraints in model development. In terms of spatial resolution, active microwaves (synthetic aperture radar – SAR) can address the issue and outperform methods based on passive microwaves. Thus, high-spatial-resolution monitoring of snow depth (SD) would allow for better parameterization of local processes that drive the spatial variability of snow. The overall objective of this study is to evaluate the potential of the TerraSAR-X (TSX) SAR sensor and the wave co-polar phase difference (CPD) method for characterizing snow cover at high spatial resolution. Consequently, we first (1) investigate SD and depth hoar fraction (DHF) variability between different vegetation classes in the Ice Creek catchment (Qikiqtaruk/Herschel Island, Yukon, Canada) using in situ measurements collected over the course of a field campaign in 2019; (2) evaluate linkages between snow characteristics and CPD distribution over the 2019 dataset; and (3) determine CPD seasonality considering meteorological data over the 2015–2019 period. SD could be extracted using the CPD when certain conditions are met. A high incidence angle (>30∘) with a high topographic wetness index (TWI) (>7.0) showed correlation between SD and CPD (R2 up to 0.72). Further, future work should address a threshold of sensitivity to TWI and incidence angle to map snow depth in such environments and assess the potential of using interpolation tools to fill in gaps in SD information on drier vegetation types.
Published: 2023

21. EnVision: Taking the pulse of our twin planet

Author: Colin Wilson, Philippe Paillou, Lionel Wilson, Daphne Stam, Karl L. Mitchell, David Waltham, Sanjay S. Limaye, Joern Helbert, Manish R. Patel, Juliet Biggs, Philippa J. Mason, Matthew J. Genge, Jan-Erik Wahlund, Tamsin A. Mather, Chris Cochrane, Franck Montmessin, Upendra N. Singh, Fabio Rocca, Marina Galand, Neil Bowles, David Hall, R. C. Ghail, Imperial College London, Department of Atmospheric, Oceanic and Planetary Physics [Oxford] ( AOPP ), University of Oxford [Oxford], Astrium [Portsmouth], EADS - European Aeronautic Defense and Space, German Aerospace Center ( DLR ), IMPEC - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales ( LATMOS ), Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Department of Physics [Madison], University of Wisconsin-Madison [Madison], The Open University [Milton Keynes] ( OU ), SRON Netherlands Institute for Space Research ( SRON ), Swedish Institute of Space Physics [Uppsala] ( IRF ), Politecnico di Milano [Milan], Royal Holloway [University of London] ( RHUL ), Department of Earth Sciences [Oxford], University of Bristol [Bristol], Observatoire aquitain des sciences de l'univers ( OASU ), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'Astrophysique de Bordeaux [Pessac] ( LAB ), Université de Bordeaux ( UB ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Université Sciences et Technologies - Bordeaux 1, Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux ( L3AB ), Jet Propulsion Laboratory ( JPL ), NASA-California Institute of Technology ( CALTECH ), Lancaster University, NASA Langley Research Center [Hampton] ( LaRC ), Department of Atmospheric, Oceanic and Planetary Physics [Oxford] (AOPP), University of Oxford, German Aerospace Center (DLR), PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), University of Wisconsin-Madison, The Open University [Milton Keynes] (OU), SRON Netherlands Institute for Space Research (SRON), Swedish Institute of Space Physics [Uppsala] (IRF), Politecnico di Milano [Milan] (POLIMI), Royal Holloway [University of London] (RHUL), Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB), Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux (L3AB), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), NASA Langley Research Center [Hampton] (LaRC), and Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: 010504 meteorology & atmospheric sciences, [PHYS.ASTR.EP]Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], 7. Clean energy, 01 natural sciences, 010305 fluids & plasmas, Physics::Geophysics, Atmosphere, Atmosphere of Venus, LIDAR, InSAR, Venus atmosphere, Venus ionosphere, Planet, 0103 physical sciences, Altimeter, Physics::Atmospheric and Oceanic Physics, 0105 earth and related environmental sciences, Remote sensing, Astronomy and Astrophysics, Venus, [ SDU.ASTR.EP ] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Exoplanet, Lidar, [ PHYS.ASTR.EP ] Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], 13. Climate action, Space and Planetary Science, Physics::Space Physics, Astrophysics::Earth and Planetary Astrophysics, Ionosphere, Interplanetary spaceflight, Geology, Venus tectonics, Venus tectonics Venus atmosphere Venus ionosphere InSAR LIDAR
Abstract: EnVision is an ambitious but low-risk response to ESA's call for a medium-size mission opportunity for a launch in 2022. Venus is the planet most similar to Earth in mass, bulk properties and orbital distance, but has evolved to become extremely hostile to life. EnVision's 5-year mission objectives are to determine the nature of and rate of change caused by geological and atmospheric processes, to distinguish between competing theories about its evolution and to help predict the habitability of extrasolar planets. Three instrument suites will address specific surface, atmosphere and ionosphere science goals. The Surface Science Suite consists of a 2.2 m 2 radar antenna with Interferometer, Radiometer and Altimeter operating modes, supported by a complementary IR surface emissivity mapper and an advanced accelerometer for orbit control and gravity mapping. This suite will determine topographic changes caused by volcanic, tectonic and atmospheric processes at rates as low as 1 mm a -1. The Atmosphere Science Suite consists of a Doppler LIDAR for cloud top altitude, wind speed and mesospheric structure mapping, complemented by IR and UV spectrometers and a spectrophotopolarimeter, all designed to map the dynamic features and compositions of the clouds and middle atmosphere to identify the effects of volcanic and solar processes. The Ionosphere Science Suite uses a double Langmiur probe and vector magnetometer to understand the behaviour and long-term evolution of the ionosphere and induced magnetosphere. The suite also includes an interplanetary particle analyser to determine the delivery rate of water and other components to the atmosphere. © 2011 Springer Science+Business Media B.V.
Published: 2016

22. Macroscopic quantum resonators (MAQRO): 2015 Update

Author: Keith Schwab, Sougato Bose, Peter Barker, Ulrich Johann, Norman Gürlebeck, Claus Braxmaier, Časlav Brukner, Sabine Hossenfelder, Antoine Heidmann, Astrid Lambrecht, Gerald Hechenblaikner, Catalina Curceanu, Rupert Ursin, Gerard J. Milburn, Guglielmo M. Tino, Holger Müller, Myungshik Kim, Nikolai Kiesel, Klaus Döringshoff, Claus Lämmerzahl, Kai Bongs, Albert Roura, Markus Aspelmeyer, Jan Gieseler, Martin Tajmar, Markus Arndt, Wolfgang P. Schleich, Sven Herrmann, Serge Reynaud, Bruno Christophe, Jörg Schmiedmayer, Wolfgang Ertmer, Manuel Rodrigues, Rainer Kaltenbaek, André Pilan-Zanoni, M. Chwalla, Hendrik Ulbricht, Michael Mazilu, C. Jess Riedel, Kishan Dholakia, James Bateman, Pierre-François Cohadon, Igor Pikovski, Ernst M. Rasel, Thilo Schuldt, A. M. Cruise, Lukas Novotny, Achim Peters, Angelo Bassi, Loïc Rondin, Vlatko Vedral, Mauro Paternostro, Vienna Center for Quantum Science and Technology, TU Vienna, Department of Physics and Astronomy [UCL London], University College of London [London] ( UCL ), Istituto Nazionale di Fisica Nucleare, Sezione di Trieste ( INFN, Sezione di Trieste ), National Institute for Nuclear Physics ( INFN ), Department of Physics, University of Trieste, Trieste, Department of Physics, College of Science, Swansea University, School of Physics and Astronomy [Birmingham], University of Birmingham [Birmingham], German Aerospace Center ( DLR ), ZARM, University of Bremen, Institute of Quantum Optics and Quantum Information ( IQOQI ), Austrian Academy of Sciences ( OeAW ), ONERA - The French Aerospace Lab ( Chatillon ), ONERA, Airbus Defence and Space Germany, Laboratoire Kastler Brossel ( LKB (Jussieu) ), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris ( FRDPENS ), Centre National de la Recherche Scientifique ( CNRS ) -École normale supérieure - Paris ( ENS Paris ) -Centre National de la Recherche Scientifique ( CNRS ) -École normale supérieure - Paris ( ENS Paris ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratori Nazionali di Frascati dell’INFN, School of Physics and Astronomy, University of St Andrews, Wigner Research Center for Physics [Budapest], Hungarian Academy of Sciences [Budapest], Institut fur Physik, Humboldt Universitat zu Berlin, Humboldt Universität zu Berlin, Institut für Quantenoptik, Leibniz Universität Hannover [Hannover] ( LUH ), Photonics Laboratory, Eidgenössische Technische Hochschule [Zürich] ( ETH Zürich ), European Southern Observatory ( ESO ), Nordita, Royal Institute of Technology [Stockholm] ( KTH ), Quantum Optics and Laser Science, Blackett Laboratory, Blackett Laboratory, Imperial College London-Imperial College London, ARC Centre for Engineered Quantum Systems, University of Queensland [Brisbane], Department of Physics [Berkeley], University of California [Berkeley], Centre for Theoretical Atomic, Molecular and Optical Physics, Queen's University [Belfast] ( QUB ), Harvard-Smithsonian Center for Astrophysics ( CfA ), Harvard University [Cambridge]-Smithsonian Institution, EN-STI-TCD, CERN [Genève], Perimeter Institute for Theoretical Physics [Waterloo], Institut für Quantenphysik, Universität Ulm, Texas A & M University Institute for Advanced Study, Institute for Quantum Science and Engineering, Applied Physics, California Institute of Technology ( CALTECH ), Institut für Luft -und Raumfahrttechnik, Technische Universität Dresden ( TUD ), Dipartimento di Fisica e Astronomia and LENS, Università degli Studi di Firenze [Firenze], School of Physics and Astronomy [Southampton], University of Southampton [Southampton], Clarendon Laboratory, University of Oxford [Oxford], Center for Quantum Technologies, National University of Singapore ( NUS ), University College of London [London] (UCL), Istituto Nazionale di Fisica Nucleare, Sezione di Trieste (INFN, Sezione di Trieste), Istituto Nazionale di Fisica Nucleare (INFN), Department of Physics [Swansea], College of Science [Swansea], Swansea University-Swansea University, German Aerospace Center (DLR), Center of Applied Space Technology and Microgravity (ZARM), Universität Bremen, Institute of Quantum Optics and Quantum Information (IQOQI), Austrian Academy of Sciences (OeAW), ONERA - The French Aerospace Lab [Châtillon], ONERA-Université Paris Saclay (COmUE), Laboratoire Kastler Brossel (LKB (Jussieu)), Université Pierre et Marie Curie - Paris 6 (UPMC)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), SUPA School of Physics and Astronomy [University of St Andrews], University of St Andrews [Scotland]-Scottish Universities Physics Alliance (SUPA), Wigner Research Centre for Physics [Budapest], Hungarian Academy of Sciences (MTA), Humboldt-Universität zu Berlin, Leibniz Universität Hannover [Hannover] (LUH), Photonics Laboratory [ETH Zürich], Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), European Southern Observatory (ESO), Nordic Institute for Theoretical Physics (NORDITA), University of California-University of California, Queen's University [Belfast] (QUB), Harvard-Smithsonian Center for Astrophysics (CfA), Smithsonian Institution-Harvard University [Cambridge], Universität Ulm - Ulm University [Ulm, Allemagne], California Institute of Technology (CALTECH), Technische Universität Dresden = Dresden University of Technology (TU Dresden), Dipartimento di Fisica e Astronomia [Firenze], Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), University of Southampton, Clarendon Laboratory [Oxford], Centre for Quantum Technologies [Singapore] (CQT), National University of Singapore (NUS), Kaltenbaek, Rainer, Aspelmeyer, Marku, Barker, Peter F, Bassi, Angelo, Bateman, Jame, Bongs, Kai, Bose, Sougato, Braxmaier, Clau, Brukner, Časlav, Christophe, Bruno, Chwalla, Michael, Cohadon, Pierre-Françoi, Cruise, Adrian Michael, Curceanu, Catalina, Dholakia, Kishan, Diósi, Lajo, Döringshoff, Klau, Ertmer, Wolfgang, Gieseler, Jan, Gürlebeck, Norman, Hechenblaikner, Gerald, Heidmann, Antoine, Herrmann, Sven, Hossenfelder, Sabine, Johann, Ulrich, Kiesel, Nikolai, Kim, Myungshik, Lämmerzahl, Clau, Lambrecht, Astrid, Mazilu, Michael, Milburn, Gerard J, Müller, Holger, Novotny, Luka, Paternostro, Mauro, Peters, Achim, Pikovski, Igor, Zanoni, André Pilan, Rasel, Ernst M, Reynaud, Serge, Riedel, Charles Je, Rodrigues, Manuel, Rondin, Loïc, Roura, Albert, Schleich, Wolfgang P, Schmiedmayer, Jörg, Schuldt, Thilo, Schwab, Keith C, Tajmar, Martin, Tino, Guglielmo M, Ulbricht, Hendrik, Ursin, Rupert, Vedral, Vlatko, Università degli studi di Trieste = University of Trieste, Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Humboldt University Of Berlin, Leibniz Universität Hannover=Leibniz University Hannover, University of California [Berkeley] (UC Berkeley), University of California (UC)-University of California (UC), Harvard University-Smithsonian Institution, Università degli Studi di Firenze = University of Florence (UniFI), and University of Oxford
Subjects: DECOHERENCE, Matter waves, Atomic and Molecular Physics, and Optic, Computer science, Quantum physics, SPONTANEOUS LOCALIZATION, Space, Physics, Atomic, Molecular & Chemical, Space (mathematics), 7. Clean energy, 01 natural sciences, 010305 fluids & plasmas, Gravitation, quant-ph, Atomic and Molecular Physics, Quantum optomechanic, PHOTONIC CRYSTAL FIBER, Matter wave, WAVE-FUNCTION COLLAPSE, Quantum, Optical trapping, Quantum Science & Technology, Physics, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, GROUND-STATE, Physical Sciences, symbols, LEVITATED NANOSPHERE, Quantum physic, [ PHYS.QPHY ] Physics [physics]/Quantum Physics [quant-ph], FOS: Physical sciences, Condensed Matter Physic, Quantum optomechanics, symbols.namesake, Theoretical physics, [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph], 0103 physical sciences, Quality (philosophy), MAQRO, Electrical and Electronic Engineering, 010306 general physics, NANOMECHANICAL OSCILLATOR, Science & Technology, Optics, Control and Systems Engineering, Quantum technology, RANDOM-WALK, REDUCTION, CAVITY, and Optics, Quantum Physics (quant-ph), Schrödinger's cat
Abstract: Do the laws of quantum physics still hold for macroscopic objects - this is at the heart of Schr\"odinger's cat paradox - or do gravitation or yet unknown effects set a limit for massive particles? What is the fundamental relation between quantum physics and gravity? Ground-based experiments addressing these questions may soon face limitations due to limited free-fall times and the quality of vacuum and microgravity. The proposed mission MAQRO may overcome these limitations and allow addressing those fundamental questions. MAQRO harnesses recent developments in quantum optomechanics, high-mass matter-wave interferometry as well as state-of-the-art space technology to push macroscopic quantum experiments towards their ultimate performance limits and to open new horizons for applying quantum technology in space. The main scientific goal of MAQRO is to probe the vastly unexplored "quantum-classical" transition for increasingly massive objects, testing the predictions of quantum theory for truly macroscopic objects in a size and mass regime unachievable in ground-based experiments. The hardware for the mission will largely be based on available space technology. Here, we present the MAQRO proposal submitted in response to the (M4) Cosmic Vision call of the European Space Agency for a medium-size mission opportunity with a possible launch in 2025., Comment: 38 pages, 10 tables, 23 figures
Published: 2015

23. New insights on the binary Asteroid 121 Hermione

Author: Mikko Kaasalainen, P. Baudouin, Pascal Descamps, Franck Marchis, Raoul Behrend, Marcelo Assafin, Melissa C. Nysewander, J. B. Haislip, F. Manzini, Josh Emery, S. Sposetti, A. Peyrot, Daniel E. Reichart, Julio Camargo, Felipe Braga-Ribas, Alan W. Harris, Joe Pollock, K. M. Ivarsen, Roberto Vieira-Martins, F. Colas, Frédéric Vachier, L. Hutton, J. Greene, J. Lecacheux, L. Brunetto, Jérôme Berthier, Aaron P. LaCluyze, J. Durech, R. Roy, J. A. Crain, J.-P. Teng-Chuen-Yu, L. Bernasconi, Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Department of Astronomy [Berkeley], University of California [Berkeley], University of California-University of California, SETI Institute, Astronomical Institute of Charles University, Charles University [Prague] (CU), Department of Earth and Planetary Sciences [Knoxville], The University of Tennessee [Knoxville], DLR Institute of Planetary Research, German Aerospace Center (DLR), Department of Mathematics and Statistics, Makes Observatory, Department of Physics and Astronomy [Boone], Appalachian State University, University of North Carolina System (UNC)-University of North Carolina System (UNC), Observatório do Valongo/UFRJ [Rio de Janeiro], Universidade Federal do Rio de Janeiro (UFRJ), Observatório Nacional/MCT, Observatório do Valongo, Universidade Federal do Rio de Janeiro Ladeira do Pedro Antônio, Department of Physics and Astronomy [Chapel Hill], University of North Carolina [Chapel Hill] (UNC), Geneva Observatory, University of Geneva [Switzerland], Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Les Engarouines Observatory, Blauvac Observatory, Harfleur Observatory, Chercheur indépendant, Gnosca Observatory, Stazione Astronomica di Sozzago, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), University of California [Berkeley] (UC Berkeley), University of California (UC)-University of California (UC), Université de Genève = University of Geneva (UNIGE), Institut de Mécanique Céleste et de Calcul des Ephémérides ( IMCCE ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Observatoire de Paris-Université de Lille-Centre National de la Recherche Scientifique ( CNRS ), Astronomy Department [Berkeley], Charles University [Prague], German Aerospace Center ( DLR ), Department of Physics and Astronomy, Universidade Federal do Rio de Janeiro [Rio de Janeiro] ( UFRJ ), The University of North Carolina at Chapel Hill, Laboratoire d'études spatiales et d'instrumentation en astrophysique ( LESIA ), and Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Centre National de la Recherche Scientifique ( CNRS )
Subjects: Solar System, 010504 meteorology & atmospheric sciences, [PHYS.ASTR.EP]Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Eclipses, [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], FOS: Physical sciences, Asteroids: rotation, Equinox, surfaces, eclipses, rotation, 01 natural sciences, law.invention, Photometry, Photometry (optics), Telescope, satellites, Spitzer Space Telescope, law, 0103 physical sciences, Adaptive optics, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, Earth and Planetary Astrophysics (astro-ph.EP), Physics, Astronomy, Astronomy and Astrophysics, Light curve, [ SDU.ASTR.EP ] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Asteroids, [ PHYS.ASTR.EP ] Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Space and Planetary Science, Asteroid, Satellites of Asteroids, Astrophysics - Earth and Planetary Astrophysics
Abstract: We report on the results of a six-month photometric study of the main-belt binary C-type asteroid 121 Hermione, performed during its 2007 opposition. We took advantage of the rare observational opportunity afforded by one of the annual equinoxes of Hermione occurring close to its opposition in June 2007. The equinox provides an edge-on aspect for an Earth-based observer, which is well suited to a thorough study of Hermione's physical characteristics. The catalog of observations carried out with small telescopes is presented in this work, together with new adaptive optics (AO) imaging obtained between 2005 and 2008 with the Yepun 8-m VLT telescope and the 10-m Keck telescope. The most striking result is confirmation that Hermione is a bifurcated and elongated body, as suggested by Marchis et al., (2005). A new effective diameter of 187 +/- 6 km was calculated from the combination of AO, photometric and thermal observations. The new diameter is some 10% smaller than the hitherto accepted radiometric diameter based on IRAS data. The reason for the discrepancy is that IRAS viewed the system almost pole-on. New thermal observations with the Spitzer Space Telescope agree with the diameter derived from AO and lightcurve observations. On the basis of the new AO astrometric observations of the small 32-km diameter satellite we have refined the orbit solution and derived a new value of the bulk density of Hermione of 1.4 +0.5/-0.2 g cm-3. We infer a macroscopic porosity of ~33 +5/-20%., Comment: 39 pages, 4 Tables, 8 figures
Published: 2009

24. CONSTRUCTING GEOLOGICAL CROSS-SECTIONS TO CONSTRAIN THE THREE-DIMENSIONAL STRATIGRAPHIC ARCHITECTURE OF THE JEZERO DELTA FRONT

Author: Barnes, Robert, Gupta, Sanjeev, Paar, Gerhard, Stack‐Morgan, Katie, Horgan, Briony, Crumpler, Larry, Tebolt, Michelle, Caravaca, Gwénaël, Holm-Alwmark, Sanna, Ortner, Thomas, Traxler, Christoph, Bechtold, A., Kalucha, Hemani, Broz, Adrian, Tate, Christian, Annex, Andrew M., Bell, Jim F., Maki, Justin, Kanine, Oak, Núñez, Jorge, Sholes, Steven, Kah, Linda C., Schmitz, Nicole, Williams, Rebecca M.E., Department of Earth Science and Engineering [Imperial College London], Imperial College London, JOANNEUM RESEARCH - Institute for Robotics and Mechatronics, Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Purdue University [West Lafayette], School of Aeronautics and Astronautics [Purdue], New Mexico Museum of Natural History and Science (NMMNHS), University of Texas at Austin [Austin], Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), University of Copenhagen = Københavns Universitet (UCPH), VRVis Research Center for Virtual Reality and Visualization, University of Vienna [Vienna], Austrian Academy of Sciences (OeAW), California Institute of Technology (CALTECH), Cornell University [New York], Division of Geological and Planetary Sciences [Pasadena], Arizona State University [Tempe] (ASU), Johns Hopkins University Applied Physics Laboratory [Laurel, MD] (APL), Department of Earth and Planetary Sciences [Knoxville], The University of Tennessee [Knoxville], DLR Institute of Planetary Research, German Aerospace Center (DLR), Planetary Science Institute [Tucson] (PSI), and Lunar and Planetary Institute
Subjects: delta, [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology, Mars2020? jezero crater, [SDU]Sciences of the Universe [physics], shenandoah formation, [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy, Mars, pro3D, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, photogrammetry, 3D
Abstract: International audience; The NASA Mars2020 rover Perseverance has been traversing series that represent the transition from crater floor lithologies to deposits of the Jezero western delta since Sol 422 of rover operations [1]. During that time, the mission has explored the exposed stratigraphic succession at the delta front, named the Shenandoah formation [2]. Here we analyse Mastcam-Z mosaics and 3D data products derived from Planetary Robotics processing and viewing tools (PRoViP and PRo3D [3]) to map the 3D geometry of key stratigraphic boundaries and document the 3D stratigraphic architecture at the sub-km- to m-scale within the Shenandoah formation.
Published: 2023

25. The impact of compositional changes on random forest predictions: applica-tion to chemcam libs data from gale crater, mars

Author: Rammelkamp, K., Gasnault, O., Bedford, C. C., Dehouck, E., Schroder, S., German Aerospace Center (DLR), DLR Institute of Optical Sensor Systems, Deutsches Zentrum für Luft- und Raumfahrt [Berlin] (DLR), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Universities Space Research Association (USRA), Astromaterials Research and Exploration Science (ARES), NASA Johnson Space Center (JSC), NASA-NASA, Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement (LGL-TPE), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS), and Lunar and Planetary Institute
Subjects: [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology, [SDU]Sciences of the Universe [physics], [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP]
Abstract: International audience
Published: 2023

26. External-cavity diode laser-based near-infrared broadband laser heterodyne radiometer for remote sensing of atmospheric CO 2

Author: Jingjing Wang, Tan Tu, Feng Zhang, Fengjiao Shen, Jian Xu, Zhensong Cao, Xiaoming Gao, Stéphane Plus, Weidong Chen, China Institute of Sport Science - Mass Sports Research Center, Chongqing University [Chongqing], German Aerospace Center (DLR), DLR Institut für Methodik der Fernerkundung / DLR Remote Sensing Technology Institute (IMF), Deutsches Zentrum für Luft- und Raumfahrt [Oberpfaffenhofen-Wessling] (DLR), Environmental Spectroscopy Laboratory, Anhui Institute of Optics & Fine Mechanics, Chinese Academy of Sciences [Beijing] (CAS), Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 (PhLAM), Université de Lille-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physico-Chimie de l'Atmosphère (LPCA), and Université du Littoral Côte d'Opale (ULCO)
Subjects: [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Atomic and Molecular Physics, and Optics
Abstract: A near-infrared broadband (1500–1640 nm) laser heterodyne radiometer (LHR) with a tunable external-cavity diode laser as the local oscillator is developed and the relative transmittance, which represents the absolute relationship between the measured spectral signals and the atmospheric transmittance, is derived. High-resolution (0.0087 cm-1) LHR spectra in the spectral region of 6248.5–6256 cm−1 were recorded for the observation of atmospheric CO2. Combined with the relative transmittance, the preprocessed measured LHR spectra, the optimal estimation method, and the Python scripts for computational atmospheric spectroscopy, the column-averaged dry-air mixing ratio of CO2 of 409.09 ± 8 ppmv in Dunkirk, France on February 23, 2019, was retrieved, which is consistent with GOSAT and TCCON data. The near-infrared external-cavity LHR demonstrated in the present work has a high potential for use in developing a robust, broadband, unattended, and all-fiber LHR for spacecraft and ground-based atmospheric sensing that offers more channel selection for inversion.
Published: 2023

27. Fast Yet Accurate Timing and Power Prediction of Artificial Neural Networks Deployed on Clock-Gated Multi-Core Platforms

Author: Dariol, Quentin, Le Nours, Sebastien, Helms, Domenik, Stemmer, Ralf, Pillement, Sebastien, Grüttner, Kim, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ), and German Aerospace Center (DLR)
Subjects: [SPI.OTHER]Engineering Sciences [physics]/Other, System Level Simulation, Power Model, Artificial Neural Networks, Multi-Core, [SPI.TRON]Engineering Sciences [physics]/Electronics
Abstract: International audience; When deploying Artificial Neural Networks (ANNs) onto multi-core embedded platforms, an intensive evaluation flow is necessaryto find implementations that optimize resource usage, timing andpower. ANNs require indeed significant amounts of computationaland memory resources to execute, while embedded execution plat-forms offer limited resources with strict power budget. Concurrentaccesses from processors to shared resources on multi-core plat-forms can lead to bottlenecks with impact on performance andpower. Existing approaches show limitations to deliver fast yetaccurate evaluation ahead of ANN deployment on the targetedhardware. In this paper, we present a modeling flow for timing andpower prediction in early design stage of fully-connected ANNs onmulti-core platforms. Our flow offers fast yet accurate predictionswith consideration of shared communication resources and scalabil-ity in regards of the number of cores used. The flow is evaluated onreal measurements for 42 mappings of 3 fully-connected ANNs exe-cuted on a clock-gated multi-core platform featuring two differentcommunication modes: polling or interrupt-based. Our modelingflow predicts timing with 97 % accuracy and power with 96 % accu-racy on the tested mappings for an average simulation time of 0.23 sfor 100 iterations. We then illustrate the application of our approachfor efficient design space exploration of ANN implementations.
Published: 2023

28. Diverse Lava Flow Morphologies in the Stratigraphy of the Jezero Crater Floor

Author: S. Alwmark, B. Horgan, A. Udry, A. Bechtold, S. Fagents, E. Ravanis, L. Crumpler, N. Schmitz, E. Cloutis, A. Brown, D. Flannery, O. Gasnault, J. Grotzinger, S. Gupta, L. Kah, P. Kelemen, K. Kinch, J. Núñez, Lund University [Lund], IT University of Copenhagen (ITU), Purdue University [West Lafayette], University of Nevada [Las Vegas] (WGU Nevada), University of Vienna [Vienna], Austrian Academy of Sciences (OeAW), University of Hawai‘i [Mānoa] (UHM), New Mexico Museum of Natural History and Science (NMMNHS), DLR Institute of Planetary Research, German Aerospace Center (DLR), Department of Geography [Winnipeg], University of Winnipeg, Queensland University of Technology [Brisbane] (QUT), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Christian-Albrechts-Universität zu Kiel (CAU), Department of Earth Science and Technology [Imperial College London], Imperial College London, The University of Tennessee [Knoxville], Lamont-Doherty Earth Observatory (LDEO), Columbia University [New York], Department of Earth and Environmental Sciences [New York], University of Copenhagen = Københavns Universitet (UCPH), and Johns Hopkins University Applied Physics Laboratory [Laurel, MD] (APL)
Subjects: Jezero crater, Geophysics, [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology, Mars2020 Perseverance Geology Geomorphology stratigraphy Jezero crater, Space and Planetary Science, Geochemistry and Petrology, [SDU]Sciences of the Universe [physics], Maaz formation, Earth and Planetary Sciences (miscellaneous), [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Mars 2020 Perseverance, Artuby, Lava
Abstract: International audience; We present a combined geomorphologic, multispectral, and geochemical analysis of crater floor rocks in Jezero crater based on data obtained by the Mastcam-Z and SuperCam instruments onboard the NASA Mars 2020 Perseverance rover. The combined data from this analysis together with the results of a comparative study with geologic sites on Earth allows us to interpret the origins of rocks exposed along the Artuby ridge, a ∼900 m long scarp of lower Máaz formation rocks. The ridge exposes rocks belonging to two morphologically distinct members, Artuby and Rochette, that both have basaltic composition and are spectrally indistinguishable in our analysis. Artuby rocks consist of morphologically distinct units that alternate over the ridge, bulbous, hummocky, layers with varying thicknesses that in places appear to have flowed over underlying strata, and sub-planar thinner laterally continuous layers with variable friability. The Rochette member has a massive appearance with pronounced pitting and sub-horizontal partings. Our findings are most consistent with a primary igneous emplacement as lava flows, through multiple eruptions, and we propose that the thin layers result either from preferential weathering, interbedded ash/tephra layers, ʻaʻā clinker layers, or aeolian deposition. Our analyses provide essential geologic context for the Máaz formation samples that will be returned to Earth and highlight the diversity and complexity of geologic processes on Mars not visible from orbit.
Published: 2023

29. Organic Compounds on the Nucleus of Comet 67/Churyumov-Gerasimenko as Revealed by COSAC Mass Spectrometry

Author: Goesmann , Fred, Rosenbauer , Helmut, Bredehoeft , Jan Hendrik, Cabane , Michel, Ehrenfreund , Pascale, Gauthier , Thomas, Giri , Chaitanya, Krueger , Harald, Le Roy , Léna, Mc Dermott , Alexandra, McKenna Lawlor , Susan, Meierhenrich , U., Munoz Caro , G., Raulin , François, Roll , R., Steele , A., Steininger , H., Sternberg , R., Szopa , Cyril, Thiemann , W., Ulamec , S., Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research (MPS), Max-Planck-Gesellschaft, Institute for Applied and Physical Chemistry [Bremen] (IAPC), University of Bremen, PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Leiden Observatory [Leiden], Universiteit Leiden, Space Policy Institute [Washington], The George Washington University (GW), NASA Goddard Space Flight Center (GSFC), Institut de Chimie de Nice (ICN), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Center for Space and Habitability (CSH), University of Bern, University of Houston [Clear Lake], Space Technology Ireland Limited, Centro de Astrobiologia [Madrid] (CAB), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Geophysical Laboratory [Carnegie Institution], Carnegie Institution for Science, German Aerospace Center (DLR), USRA Houston, Max Planck Institute for Solar System Research (MPS), Universiteit Leiden [Leiden], Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Instituto Nacional de Técnica Aeroespacial (INTA), Carnegie Institution for Science [Washington], Cardon, Catherine, Max Planck Institute for Solar System Research ( MPS ), Institute for Applied and Physical Chemistry [Bremen] ( IAPC ), IMPEC - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales ( LATMOS ), Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), George Washington University ( GW ), NASA Goddard Space Flight Center ( GSFC ), Institut de Chimie de Nice ( ICN ), Université Nice Sophia Antipolis ( UNS ), Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ), Center for Space and Habitability ( CSH ), University of Houston-Clear Lake, Centro de Astrobiologia [Madrid] ( CAB ), Instituto Nacional de Técnica Aeroespacial ( INTA ) -Consejo Superior de Investigaciones Científicas [Spain] ( CSIC ), Laboratoire inter-universitaire des systèmes atmosphèriques ( LISA ), Institut national des sciences de l'Univers ( INSU - CNRS ) -Université Paris Diderot - Paris 7 ( UPD7 ) -Université Paris-Est Créteil Val-de-Marne - Paris 12 ( UPEC UP12 ) -Centre National de la Recherche Scientifique ( CNRS ), German Aerospace Center ( DLR ), George Washington University (GW), Centre National de la Recherche Scientifique (CNRS)-Université Nice Sophia Antipolis (... - 2019) (UNS), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Spain] (CSIC), and Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], [SDU.ASTR.EP] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], [ SDU.ASTR.EP ] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP]
Abstract: International audience; The evolved gas analyzer COmetary SAmplingand Composition experiment (COSAC) aboardthe Philae Lander of ESA’s Rosetta mission was designedto make unique in situ chemical analyses ofnucleus material from comet 67P/Churyumov-Gerasimenko, with an emphasis on organic molecules.Twenty-five minutes after Philae’s initial touchdown,the COSAC mass spectrometer took a spectrum insniffing mode, which displayed an interesting suite oforganic compounds. The sampled material is likely tohave originated from the dust cloud produced by Philae’sfirst contact with the ground. Analysis of themass spectrum shows 16 compounds, among them sixdistinct organic homologous series: alcohols, carbonyls,amines, nitriles, amides and isocyanates. Nearlyall the molecules inferred from our data are potentialprecursors, products, adducts or by-products of eachother that can be formed either by surface reactions orby thermal and/or radiation processing of icy surfaces.A relatively abundant nitrogen source, such as NH3, isrequired to form the suite of N-bearing species. Severalorganic compounds have not been identified in cometsbefore or only upper limits have been derived. Overallthe identified compounds provide indications of severalpossible links between interstellar chemistry, cometaryorganic chemistry and terrestrial prebiotic chemistry.These unique COSAC measurements from a cometarysurface provide an unprecedented glimpse intothe early origins of our solar system, 4.6 billion yearsago.
Published: 2015

30. CASTALIA : A mission to a main belt comet

Author: Jones, G. H., Altwegg, K., Bertini, I., Bieler, A., Boehnhardt, H., Bowles, N., Braukhane, A., Capria, M., T., Coates, A. J., Ciarletti, Valérie, Davidsson, B., Engrand, Cécile, Fitzsimmons, A., Gibbings, A., Hainaut, O., Hallmann, M., Herique, Alain, Hilchenbach, M., Homeister, M., Hsieh, H., Jehin, E., Kofman, W., Lara, L. M., Licandro, J., Lowry, S.C., Moreno, F., Muinonen, Karri, Paetzold, M., Penttilä, Antti, Plettmeier, Dirk, Prialnik, D., Marboeuf, U., Marzari, F., Meech, Karen J., Rotundi, A., Smith, A., Snodgrass, C., Thomas, I., Trieloff, M., Mullard Space Science Laboratory (MSSL), University College of London [London] (UCL), Physikalisches Institut [Bern], Universität Bern [Bern], Centro di Ateneo di Studi e Attività Spaziali 'Giuseppe Colombo' (CISAS), Universita degli Studi di Padova, Department of Atmospheric, Oceanic, and Space Sciences [Ann Arbor] (AOSS), University of Michigan [Ann Arbor], University of Michigan System-University of Michigan System, Max-Planck-Institut für Sonnensystemforschung (MPS), Max-Planck-Gesellschaft, Department of Atmospheric, Oceanic and Planetary Physics [Oxford] (AOPP), University of Oxford [Oxford], DLR Institute of Space Systems, German Aerospace Center (DLR), Istituto di Astrofisica e Planetologia Spaziali - INAF (IAPS), Istituto Nazionale di Astrofisica (INAF), PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Department of Physics and Astronomy [Uppsala], Uppsala University, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Astrophysics Research Centre [Belfast] (ARC), Queen's University [Belfast] (QUB), Department of Mechanical and Aerospace Engineering [Univ Strathclyde], University of Strathclyde [Glasgow], European Southern Observatory (ESO), Institut de Planétologie et d'Astrophysique de Grenoble (IPAG ), Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), OHB Systems AG, Institute for Astronomy [Honolulu], University of Hawai‘i [Mānoa] (UHM), Academia Sinica Institute of Astronomy and Astrophysics (ASIAA), Academia Sinica, Institut d'Astrophysique et de Géophysique [Liège], Université de Liège, Instituto de Astrofísica de Andalucía (IAA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Instituto de Astrofisica de Canarias (IAC), Centre for Astrophysics and Planetary Science [Canterbury] (CAPS), University of Kent [Canterbury], Department of Physics [Helsinki], Falculty of Science [Helsinki], University of Helsinki-University of Helsinki, Universität zu Köln, Helsinki Institute of Physics (HIP), University of Helsinki, Technische Universität Dresden = Dresden University of Technology (TU Dresden), Tel Aviv University [Tel Aviv], Istituto Nazionale di Fisica Nucleare, Sezione di Padova (INFN, Sezione di Padova), Istituto Nazionale di Fisica Nucleare (INFN), Universita degli studi di Napoli 'Parthenope' [Napoli], The Open University [Milton Keynes] (OU), Universität Heidelberg [Heidelberg], IMPEC - LATMOS, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Department of Mechanical and Aerospace Engineering [Glasgow], University of Strathclyde, Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Centre National d'Études Spatiales [Toulouse] (CNES)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Consejo Superior de Investigaciones Científicas [Spain] (CSIC), Technische Universität Dresden (TUD), National Institute for Nuclear Physics (INFN), Cardon, Catherine, Universität Bern [Bern] (UNIBE), Università degli Studi di Padova = University of Padua (Unipd), Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research (MPS), University of Oxford, Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Orbitale Hochtechnologie Bremen (OHB Systems AG), Helsingin yliopisto = Helsingfors universitet = University of Helsinki-Helsingin yliopisto = Helsingfors universitet = University of Helsinki, Universität zu Köln = University of Cologne, Helsingin yliopisto = Helsingfors universitet = University of Helsinki, Tel Aviv University (TAU), Università degli Studi di Napoli 'Parthenope' = University of Naples (PARTHENOPE), Universität Heidelberg [Heidelberg] = Heidelberg University, Mullard Space Science Laboratory ( MSSL ), University College of London [London] ( UCL ), Centro di Ateneo di Studi e Attività Spaziali 'Giuseppe Colombo' ( CISAS ), Universita degli Studi di Padova = University of Padua = Université de Padoue, Department of Atmospheric, Oceanic, and Space Sciences [Ann Arbor] ( AOSS ), Max-Planck-Institut für Sonnensystemforschung ( MPS ), Department of Atmospheric, Oceanic and Planetary Physics [Oxford] ( AOPP ), German Aerospace Center ( DLR ), Istituto di Astrofisica e Planetologia Spaziali ( IAPS ), Istituto Nazionale di Astrofisica ( INAF ), Laboratoire Atmosphères, Milieux, Observations Spatiales ( LATMOS ), Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse ( CSNSM ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Astrophysics Research Centre [Belfast] ( ARC ), Queen's University [Belfast] ( QUB ), European Southern Observatory ( ESO ), Institut de Planétologie et d'Astrophysique de Grenoble ( IPAG ), Observatoire des Sciences de l'Univers de Grenoble ( OSUG ), Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ) -Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ) -Centre National de la Recherche Scientifique ( CNRS ), University of Hawaii at Manoa ( UHM ), Institute of Astronomy and Astrophysics [Taipei] ( ASIAA ), Instituto de Astrofísica de Andalucía ( IAA ), Consejo Superior de Investigaciones Científicas [Spain] ( CSIC ), Instituto de Astrofisica de Canarias ( IAC ), Centre for Astrophysics and Planetary Science [Canterbury] ( CAPS ), University of Helsinki [Helsinki], Helsinki Institute of Physics ( HIP ), Technische Universität Dresden ( TUD ), Istituto Nazionale di Fisica Nucleare, Sezione di Padova ( INFN, Sezione di Padova ), National Institute for Nuclear Physics ( INFN ), and The Open University [Milton Keynes] ( OU )
Subjects: [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], [SDU.ASTR.EP] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], [ SDU.ASTR.EP ] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP]
Abstract: International audience; Main Belt Comets (MBCs), a type of Active Asteroid , constitute a newly identified class of solar system objects. They have stable, asteroid-like orbits and some exhibit a recurrent comet-like appearance. It is believed that they survived the age of the solar system in a dormant state and that their current ice sublimation driven activity only began recently. Buried water ice is the only volatile expected to survive under an insulating surface. Excavation by an impact can expose the ice and trigger the start of MBC activity. We present the case for a mission to one of these objects, to be submitted to the European Space Agency's current call for an M-class mission. The specific science goals of the Castalia mission are: 1. Characterize a new Solar System family, the MBCs, by in-situ investigation 2. Understand the physics of activity on MBCs 3. Directly sample water in the asteroid belt and test if MBCs are a viable source for Earth's water 4. Use the observed structure of an MBC as a tracer of planetary system formation and evolution.
Published: 2015

31. Organic compounds on comet 67P/Churyumov-Gerasimenko revealed by COSAC mass spectrometry

Author: Michel Cabane, Pascale Ehrenfreund, A. J. MacDermott, Thomas Gautier, Uwe J. Meierhenrich, Wolfram Thiemann, Harald Steininger, Guillermo M. Muñoz Caro, H. Rosenbauer, Cyril Szopa, Chaitanya Giri, Robert Sternberg, Andrew Steele, Stephan Ulamec, Fred Goesmann, Jan Hendrik Bredehöft, Léna Le Roy, Reinhard Roll, Susan McKenna-Lawlor, François Raulin, Harald Krüger, Max Planck Institute for Solar System Research ( MPS ), Institute for Applied and Physical Chemistry [Bremen] ( IAPC ), University of Bremen, IMPEC - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales ( LATMOS ), Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Leiden Observatory [Leiden], Universiteit Leiden [Leiden], Space Policy Institute [Washington], George Washington University ( GW ), NASA Goddard Space Flight Center ( GSFC ), Institut de Chimie de Nice ( ICN ), Université Nice Sophia Antipolis ( UNS ), Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ), Center for Space and Habitability ( CSH ), University of Bern, University of Houston-Clear Lake, Space Technology Ireland Limited, Centro de Astrobiologia [Madrid] ( CAB ), Instituto Nacional de Técnica Aeroespacial ( INTA ) -Consejo Superior de Investigaciones Científicas [Spain] ( CSIC ), Laboratoire inter-universitaire des systèmes atmosphèriques ( LISA ), Institut national des sciences de l'Univers ( INSU - CNRS ) -Université Paris Diderot - Paris 7 ( UPD7 ) -Université Paris-Est Créteil Val-de-Marne - Paris 12 ( UPEC UP12 ) -Centre National de la Recherche Scientifique ( CNRS ), Geophysical Laboratory [Carnegie Institution], Carnegie Institution for Science [Washington], German Aerospace Center ( DLR ), Max Planck Institute for Solar System Research (MPS), Max-Planck-Gesellschaft, Institute for Applied and Physical Chemistry [Bremen] (IAPC), PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), The George Washington University (GW), NASA Goddard Space Flight Center (GSFC), Institut de Chimie de Nice (ICN), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA), Center for Space and Habitability (CSH), University of Houston [Clear Lake], Centro de Astrobiologia [Madrid] (CAB), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Instituto Nacional de Técnica Aeroespacial (INTA), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), German Aerospace Center (DLR), George Washington University (GW), Centre National de la Recherche Scientifique (CNRS)-Université Nice Sophia Antipolis (... - 2019) (UNS), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Spain] (CSIC), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research (MPS), Universiteit Leiden, Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), and Carnegie Institution for Science
Subjects: Solar System, 010504 meteorology & atmospheric sciences, Comet, [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Mass spectrometry, 01 natural sciences, Astrobiology, chemistry.chemical_compound, comet, 0103 physical sciences, Acetone, 010303 astronomy & astrophysics, Refractory (planetary science), mass spectrometry, 0105 earth and related environmental sciences, 67P, Multidisciplinary, COSAC, Chemistry, Propionaldehyde, Philae, [ SDU.ASTR.EP ] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Gas analyzer, 13. Climate action, In situ analysis, organic compounds
Abstract: International audience; Comets harbor the most pristine material in our solar system in the form of ice, dust, silicates, and refractory organic material with some interstellar heritage. The evolved gas analyzer Cometary Sampling and Composition (COSAC) experiment aboard Rosetta’s Philae lander was designed for in situ analysis of organic molecules on comet 67P/Churyumov-Gerasimenko. Twenty-five minutes after Philae’s initial comet touchdown, the COSAC mass spectrometer took a spectrum in sniffing mode, which displayed a suite of 16 organic compounds, including many nitrogen-bearing species but no sulfur-bearing species, and four compounds—methyl isocyanate, acetone, propionaldehyde, and acetamide—that had not previously been reported in comets.
Published: 2015

32. Time variability and heterogeneity in the coma of 67P/Churyumov-Gerasimenko

Author: Peter Eberhardt, André Bieler, Bernard Marty, Sébastien Gasc, Martin Rubin, B. Fiethe, Tobias Owen, Tamas I. Gombosi, Carmen Tornow, Myrtha Hässig, Henri Rème, Ekkehard Kührt, Annette Jäckel, Stephen A. Fuselier, Eddy Neefs, J. De Keyser, J. H. Waite, Hans Balsiger, Christelle Briois, Akiva Bar-Nun, Peter Wurz, Marina Galand, Chia-Yu Tzou, Kathrin Altwegg, Léna Le Roy, Ursina Calmonte, Kirk C. Hansen, Ulrich Mall, Michael R. Combi, Thierry Sémon, Olivier Mousis, Peter Bochsler, E. Kopp, A. Korth, Jean-Jacques Berthelier, H. U. Keller, Space Science Division [San Antonio], Southwest Research Institute [San Antonio] (SwRI), Physikalisches Institut [Bern], Universität Bern [Bern], Center for Space and Habitability (CSH), University of Bern, Department of Geosciences [Tel Aviv], Tel Aviv University [Tel Aviv], PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Department of Atmospheric, Oceanic, and Space Sciences [Ann Arbor] (AOSS), University of Michigan [Ann Arbor], University of Michigan System-University of Michigan System, Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Centre for Mathematical Plasma-Astrophysics [Leuven] (CmPA), Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB), Institute of Computer and Network Engineering [Braunschweig] (IDA), Technische Universität Braunschweig = Technical University of Braunschweig [Braunschweig], Space Science and Engineering Division [San Antonio], Imperial College London, DLR Institute of Planetary Research, German Aerospace Center (DLR), Institut für Geophysik und Extraterrestrische Physik [Braunschweig] (IGEP), Max-Planck-Institut für Sonnensystemforschung (MPS), Max-Planck-Gesellschaft, Centre de Recherches Pétrographiques et Géochimiques (CRPG), Université de Lorraine (UL)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Institute for Astronomy [Honolulu], University of Hawai‘i [Mānoa] (UHM), Institut de recherche en astrophysique et planétologie (IRAP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), European Space Agency PRODEX Program, CNES, ANR-11-IDEX-0001,Amidex,INITIATIVE D'EXCELLENCE AIX MARSEILLE UNIVERSITE(2011), European Project: 267255,EC:FP7:ERC,ERC-2010-AdG_20100224,NOGAT(2011), Universität Bern [Bern] (UNIBE), Department of Geophysics [Tel Aviv] (TAU), Tel Aviv University (TAU), Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research (MPS), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Southwest Research Institute [San Antonio] ( SwRI ), Center for Space and Habitability ( CSH ), IMPEC - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales ( LATMOS ), Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Department of Atmospheric, Oceanic, and Space Sciences [Ann Arbor] ( AOSS ), Laboratoire de Physique et Chimie de l'Environnement et de l'Espace ( LPC2E ), Centre National de la Recherche Scientifique ( CNRS ) -Université d'Orléans ( UO ) -Institut national des sciences de l'Univers ( INSU - CNRS ), Centre for Mathematical Plasma-Astrophysics [Leuven] ( CmPA ), Katholieke Universiteit Leuven ( KU Leuven ), Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique ( BIRA-IASB ), Institute of Computer and Network Engineering [Braunschweig] ( IDA ), Technische Universität Braunschweig [Braunschweig], German Aerospace Center ( DLR ), Institut für Geophysik und Extraterrestrische Physik [Braunschweig] ( IGEP ), Max-Planck-Institut für Sonnensystemforschung ( MPS ), Centre de Recherches Pétrographiques et Géochimiques ( CRPG ), Université de Lorraine ( UL ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'Astrophysique de Marseille ( LAM ), Centre National de la Recherche Scientifique ( CNRS ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Aix Marseille Université ( AMU ) -Centre National d'Etudes Spatiales ( CNES ), University of Hawaii at Manoa ( UHM ), Institut de recherche en astrophysique et planétologie ( IRAP ), Université Paul Sabatier - Toulouse 3 ( UPS ) -Observatoire Midi-Pyrénées ( OMP ) -Centre National de la Recherche Scientifique ( CNRS ), ANR-11-IDEX-0001-02/11-IDEX-0001,Amidex,Amidex ( 2011 ), European Project : 267255,EC:FP7:ERC,ERC-2010-AdG_20100224,NOGAT ( 2011 ), Science and Technology Facilities Council (STFC), and Science and Technology Facilities Council [2006-2012]
Subjects: 67P/Churyumov-Gerasimenko, Solar System, General Science & Technology, Comet, [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Coma (optics), Astrophysics, ROSINA, Astrobiology, Latitude, law.invention, Orbiter, comet, law, [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry, [ SDU.STU.PG ] Sciences of the Universe [physics]/Earth Sciences/Paleontology, Physics, Science & Technology, Multidisciplinary, Spectrometer, COMETS, food and beverages, Planetary system, [ SDU.STU.GC ] Sciences of the Universe [physics]/Earth Sciences/Geochemistry, [ SDU.ASTR.EP ] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Multidisciplinary Sciences, Outgassing, 13. Climate action, Science & Technology - Other Topics, time variability, sense organs, [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology
Abstract: International audience; Comets contain the best-preserved material from the very beginning of our planetary system. Their nuclei and comae composition reveal clues about physical and chemical conditions during the early Solar system when comets formed. ROSINA/DFMS (Rosetta Orbiter Spectrometer for Ion and Neutral Analysis / Double Focusing Mass Spectrometer) onboard the Rosetta spacecraft has measured the coma composition of comet 67P/Churyumov-Gerasimenko (67P) with excellent time resolution and compositional detail. Measurements were made over many comet rotation periods and a wide range of latitudes. These measurements show large fluctuations in composition in a heterogeneous coma that has diurnal and possibly seasonal variations in the major outgassing species: H2O, CO, and CO2. These results indicate a complex coma-nucleus relationship where seasonal variations may be driven by temperature differences near the comet surface.
Published: 2015

33. CyCU-Net: Cycle-Consistency Unmixing Network by Learning Cascaded Autoencoders

Author: Jocelyn Chanussot, Zhu Han, Lianru Gao, Danfeng Hong, Bing Zhang, Chinese Academy of Sciences [Beijing] (CAS), German Aerospace Center (DLR), GIPSA - Signal Images Physique (GIPSA-SIGMAPHY), GIPSA Pôle Sciences des Données (GIPSA-PSD), Grenoble Images Parole Signal Automatique (GIPSA-lab), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Grenoble Alpes (UGA), Apprentissage de modèles à partir de données massives (Thoth), Inria Grenoble - Rhône-Alpes, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire Jean Kuntzmann (LJK), Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), and ANR-19-P3IA-0003,MIAI,MIAI @ Grenoble Alpes(2019)
Subjects: remote sensing (RS), business.industry, Computer science, Deep learning, 0211 other engineering and technologies, Process (computing), Hyperspectral imaging, Pattern recognition, 02 engineering and technology, cycle consistency, Net (mathematics), Autoencoder, Cascaded autoencoders (AEs), hyperspectral unmixing (HU), Term (time), self-perception, Consistency (database systems), deep learning (DL), [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Curve fitting, General Earth and Planetary Sciences, Artificial intelligence, Electrical and Electronic Engineering, business, 021101 geological & geomatics engineering
Abstract: International audience; In recent years, deep learning (DL) has attracted increasing attention in hyperspectral unmixing (HU) applications due to its powerful learning and data fitting ability. The autoencoder (AE) framework, as an unmixing baseline network, achieves good performance in HU by automatically learning low-dimensional embeddings and reconstructing data. Nevertheless, the conventional AE-based architecture, which focuses more on the pixel-level reconstruction loss, tends to lose some significant detailed information of certain materials (e.g., material-related properties) in the reconstruction process. Therefore, inspired by the perception mechanism, we propose a cycle-consistency unmixing network, called CyCU-Net, by learning two cascaded AEs in an end-to-end fashion, to enhance the unmixing performance more effectively. CyCU-Net is capable of reducing the detailed and material-related information loss in the process of reconstruction by relaxing the original pixel-level reconstruction assumption to cycle consistency dominated by the cascaded AEs. More specifically, cycle consistency can be achieved by a newly proposed self-perception loss, which consists of two spectral reconstruction terms and one abundance reconstruction term. By taking advantage of the self-perception loss in the network, the high-level semantic information can be well preserved in the unmixing process. Moreover, we investigate the performance gain of CyCU-Net with extensive ablation studies. Experimental results on one synthetic and three real hyperspectral data sets demonstrate the effectiveness and competitiveness of the proposed CyCU-Net in comparison with several state-of-the-art unmixing algorithms.
Published: 2022

34. Community-driven Governance of FAIRness Assessment: An Open Issue, an Open Discussion Authorship Community

Author: Wilkinson, Mark D., Sansone, Susanna-Assunta, Méndez, Eva, David, Romain, Dennis, Richard, Hecker, David, Kleemola, Mari, Lacagnina, Carlo, Nikiforova, Anastasija, Centro de Biotecnología y Genómica de Plantas (CBGP), Universidad Politécnica de Madrid (UPM), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria = National Institute for Agricultural and Food Research and Technology (INIA), University of Oxford, Universidad Carlos III de Madrid [Madrid] (UC3M), European Research Infrastructure on Highly Pathogenic Agents (ERINHA-AISBL), University of Copenhagen = Københavns Universitet (UCPH), Royal Danish Library, German Aerospace Center (DLR), Tampere University of Technology [Tampere] (TUT), Finnish Social Science Data Archive, Barcelona Supercomputing Center - Centro Nacional de Supercomputacion (BSC - CNS), Institute of Computer Science [University of Tartu, Estonie], University of Tartu, EOSC Association, EOSC, European Project: 824087,EOSC-Life, and European Project: EOSC Association
Subjects: Governance, Reusable, FAIRness, Findable, Recommendation, ACM: K.: Computing Milieux, EOSC, Open Science, ACM: H.: Information Systems, Interoperable, [INFO]Computer Science [cs], Accessible, ACM: C.: Computer Systems Organization, digital objects
Abstract: Although FAIR Research Data Principles are targeted at and implemented by different communities, research disciplines, and research stakeholders (data stewards, curators, etc.), there is no conclusive way to determine the level of FAIRness intended or required to make research artefacts (including, but not limited to, research data) Findable, Accessible, Interoperable, and Reusable.The FAIR Principles cover all types of digital objects, metadata, and infrastructures. However, they focus their narrative on data features that support their reusability. FAIR defines principles, not standards, and therefore they do not propose a mechanism to achieve the behaviours they describe in an attempt to be technology/implementation neutral.FAIR is evolving in some expected and some unexpected ways. FAIR “Reusability” sub-principle R1.3 states that "(meta)data should meet domain-relevant community standards," which predicts a proliferation of FAIR interpretations by individual communities as they select their preferred approach to FAIRness. Similarly, as expected, there is an active movement around the adaptation of the FAIR Principles to digital objects other than data (e.g., software and workflows), again with individual communities interpreting what FAIRness means in these expanded contexts. However, there have also been attempts to expand the FAIR Principles themselves in recent years, including features of digital objects beyond reusability, including popularity (reuse/citation), reproducibility, reliability, data quality, etc. All of this is occurring with no overall coordination or planning.A range of FAIR assessment metrics and tools have been designed that measure FAIRness. Unfortunately, the same digital objects assessed by different tools often exhibit widely different outcomes because of these independent interpretations of FAIR. This results in confusion among the publishers, the funders, and the users of digital research objects. Moreover, in the absence of a standard and transparent definition of what constitutes FAIR behaviours, there is a temptation to define existing approaches as being FAIR-compliant rather than having FAIR define the expectedbehaviours. While it is anticipated that communities will define domain-specific FAIR metrics and tests, it is desirable to avoid "gaming the system" and have broadly agreed-upon approaches to FAIRness that do not favour a specific implementation of technology.These observations suggest a growing need to align the different interpretations of the FAIR Principles. However, this whitepaper does not suggest that the FAIR Principles themselves require governance. Indeed, the document argues that the Principles should remain untouched. Specialised communities should extend/edit those Principles to adapt and make them more relevant to their community and their specific research outcome intended to be FAIR.This whitepaper identifies three high-level stakeholder categories -FAIR decision and policymakers, FAIR custodians, and FAIR practitioners - and provides examples outlining specific stakeholders' (hypothetical but anticipated) needs. It also examines possible models for governance based on the existing peer efforts, standardisation bodies, and other ways to acknowledge specifications and potential benefits.This whitepaper can serve as a starting point to foster an open discussion around FAIRness governance and the mechanism(s) that could be used to implement it, to be trusted, broadly representative, appropriately scoped, and sustainable.
Published: 2022

35. From Single Cells to Flowers – Biological Complexity Driving Plant Reproductive Development

Author: Xiaocai Xu, Jian Xu, Teva Vernoux, Kerstin Kaufmann, Rosario Vega, Sebastian Marquardt, Isabel Schwarz, Lucia Colombo, Manuel Neumann, Letizia Cornaro, University of Copenhagen = Københavns Universitet (UCPH), Humboldt State University (HSU), Humboldt University Of Berlin, Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB), Reproduction et développement des plantes (RDP), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), German Aerospace Center (DLR), DLR Institut für Methodik der Fernerkundung / DLR Remote Sensing Technology Institute (IMF), and Deutsches Zentrum für Luft- und Raumfahrt [Oberpfaffenhofen-Wessling] (DLR)
Subjects: agricultural_sciences_agronomy, epigenetics, Evolutionary biology, RNA biology, single cell biology, [SDV.BBM.GTP]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Genomics [q-bio.GN], flower development, Genomics, Epigenetics, Biology, [SDV.BDD]Life Sciences [q-bio]/Development Biology
Abstract: The rise of data science in biology stimulates interdisciplinary collaborations to address fundamental questions. Here, we report the outcome of the first SINFONIA symposium focused on revealing the mechanisms governing plant reproductive development across biological scales. The intricate and dynamic target networks of known regulators of flower development remain poorly understood. To analyze development from the genome to the final floral organ morphology, high-resolution data that capture spatiotemporal regulatory activities are necessary and require advanced computational methods for analysis and modeling. Moreover, frameworks to share data, practices and approaches that facilitate the combination of varied expertise to advance the field are called for. Training young researchers in interdisciplinary approaches and science communication offers the opportunity to establish a collaborative mindset to shape future research.
Published: 2022

36. Survey Harmonisation with New Technologies Improvement –SHANTI

Author: ARMOOGUM, Jimmy, BONSALL, Peter, Browne, Michael, CHRISTENSEN, Linda, COOLS, MarIO, Cornelis, Eric, DIANA, Marco, GUILLOUX, Tristan, HARDER, HENRIK, HEGNER REINAU, Kristian, Hubert, Jean-Paul, KAGERBAUER, Martin, KUHNIMHOF, Tobias, MADRE, Jean Loup, MOISEEVA, Anastasia, POLAK, John, SCHULZ, Angelica, TEBAR, Maria, VIDALAKIS, Lycurgo, Dynamiques Economiques et Sociales des Transports (IFSTTAR/AME/DEST), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Communauté Université Paris-Est, Institute for Transport Studies, University of Leeds-Affiliation nécessaire..., School of Architecture and the Built Environment, University of Westminster [London] (UOW)-Affiliation nécessaire..., DTU Transport, Technical University of Denmark [Lyngby] (DTU), Local Environment Mangement and Analysis, Université de Liège-Affiliation nécessaire..., Transportation Research Group, Université de Namur [Namur], Departamento di Idraulica, Trasporti e Infrastrutture Civili, Politecnico di Torino [Torino] (Polito), Centre d'Etudes et d'Expertise sur les Risques, l'Environnement, la Mobilité et l'Aménagement - Direction Territoires et Ville (Cerema Direction Territoires et Ville), Centre d'Etudes et d'Expertise sur les Risques, l'Environnement, la Mobilité et l'Aménagement (Cerema), Department of Architecture, Design and Media Technology, Aalborg University [Denmark] (AAU)-Affiliation nécessaire..., Karlsruhe Institute of Technology (KIT), Institute for Mobility Research, Urban Planning Group, Eindhoven University of Technology [Eindhoven] (TU/e)-Affiliation nécessaire...-Technische Universiteit Eindhoven (TU/e), Imperial College London, German Aerospace Center (DLR), Interuniversity Department of Régional and Urban Studies and Planning, Université de Namur [Namur] (UNamur), Politecnico di Torino = Polytechnic of Turin (Polito), Department of Architecture, Design and Media Technology [Aalborg], Aalborg University [Denmark] (AAU), Eindhoven University of Technology [Eindhoven] (TU/e)-Technische Universiteit Eindhoven (TU/e)-Affiliation nécessaire..., Dynamiques Economiques et Sociales des Transports ( IFSTTAR/AME/DEST ), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux ( IFSTTAR ) -Communauté Université Paris-Est, University of Westminster [London] ( UOW ) -Affiliation nécessaire..., Technical University of Denmark [Lyngby] ( DTU ), Politecnico di Torino [Torino] ( Polito ), Centre d'Etudes et d'Expertise sur les Risques, l'Environnement, la Mobilité et l'Aménagement - Direction Territoires et Ville ( Cerema Direction Territoires et Ville ), Centre d'Etudes et d'Expertise sur les Risques, l'Environnement, la Mobilité et l'Aménagement ( Cerema ), Aalborg University [Denmark] ( AAU ) -Affiliation nécessaire..., Karlsruhe Institute of Technology ( KIT ), Eindhoven University of Technology [Eindhoven] ( TU/e ) -Affiliation nécessaire...-Technische Universiteit Eindhoven, and German Aerospace Center ( DLR )
Subjects: TRAITEMENT DES DONNEES, TECHNOLOGIE, ENQUETE SUR LES DEPLACEMENTS, BASE DE DONNEES, DEPLACEMENT, [SDE.ES]Environmental Sciences/Environmental and Society, [ SDE.ES ] Environmental Sciences/Environmental and Society
Abstract: Au cours des quatre dernières années, nous avons coordonné des travaux de recherche sur l’harmonisation des enquêtes de mobilité en Europe pour l’Action COST SHANTI (Survey Harmonization with New Technologies Improvement). 36 laboratoires de 21 pays (d’Europe, mais aussi l’Australie) ont oeuvré ensemble, en 20 réunions et 4 groupes de travail, notamment pour harmoniser les méthodes de production et de traitement de données nationales sur la mobilité, tenant compte des derniers apports des nouvelles technologies (traces gps, gsm, rds, etc.), afin de pouvoir réaliser des comparaisons internationales. Ainsi, des travaux portant sur la correction des biais de méthodes entre enquêtes des différents pays ont permis de produire des estimateurs de mobilité quotidienne robustes et cohérents. Cette Action a été un espace de discussion non seulement pour faire émerger (avec Eurostat et la DG Move) de nouveaux projets autour des données, sur la collecte en continu et la standardisation permise par ces nouvelles technologies, mais aussi pour produire des articles et communications scientifiques.
Published: 2014

37. Science goals and mission concept for the future exploration of Titan and Enceladus

Author: Jason M. Soderblom, François Raulin, Frank Postberg, Katrin Stephan, Joseph Westlake, Anezina Solomonidou, Robert A. West, Francis Nimmo, Nathalie Carrasco, E.R. Stofan, Elizabeth P. Turtle, Dirk Schulze-Makuch, Roland Wagner, Giuseppe Mitri, A. Lefèvre, Daniel Cordier, Gabriel Tobie, Athena Coustenis, Ralf Jaumann, Timothy A. Livengood, Andrew J. Coates, L. Norman, Jean-Pierre Lebreton, Robert T. Pappalardo, Wolf D. Geppert, R. de Kok, Juergen Schmidt, Sebastien Rodriguez, Conor A. Nixon, Kathleen Mandt, Nicholas A Teanby, Laboratoire de Planétologie et Géodynamique UMR6112 (LPG), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Nantes - Faculté des Sciences et des Techniques, Université de Nantes (UN)-Université de Nantes (UN)-Université d'Angers (UA), School of Earth Sciences [Bristol], University of Bristol [Bristol], Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), DLR Institute of Planetary Research, German Aerospace Center (DLR), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS), University of Potsdam, IMPEC - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Mullard Space Science Laboratory (MSSL), University College of London [London] (UCL), Univers, Transport, Interfaces, Nanostructures, Atmosphère et environnement, Molécules (UMR 6213) (UTINAM), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), SRON Netherlands Institute for Space Research (SRON), Stockholm University, Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Centre National d'Études Spatiales [Toulouse] (CNES)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), NASA Goddard Space Flight Center (GSFC), Space Science and Engineering Division [San Antonio], Southwest Research Institute [San Antonio] (SwRI), Department of Earth and Planetary Sciences [Santa Cruz], University of California [Santa Cruz] (UCSC), University of California-University of California, Jet Propulsion Laboratory (JPL), California Institute of Technology (CALTECH)-NASA, Universität Heidelberg [Heidelberg], Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Washington State University (WSU), Massachusetts Institute of Technology (MIT), Johns Hopkins University Applied Physics Laboratory [Laurel, MD] (APL), Laboratoire de Planétologie et Géodynamique [UMR 6112] (LPG), Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), University of Potsdam = Universität Potsdam, PLANETO - LATMOS, Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Department of Physics [Stockholm], European Space Research and Technology Centre (ESTEC), Agence Spatiale Européenne = European Space Agency (ESA), University of California [Santa Cruz] (UC Santa Cruz), University of California (UC)-University of California (UC), NASA-California Institute of Technology (CALTECH), Institut für Geowissenschaften [Heidelberg], Universität Heidelberg [Heidelberg] = Heidelberg University, Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Department of Earth, Atmospheric and Planetary Sciences [MIT, Cambridge] (EAPS), Faculty of Geology and Geoenvironment [Athens], National and Kapodistrian University of Athens (NKUA), DLR Institut für Planetenforschung, Deutsches Zentrum für Luft- und Raumfahrt [Berlin] (DLR), Institut de Planétologie et d'Astrophysique de Grenoble (IPAG ), Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), Laboratoire de Planétologie et Géodynamique de Nantes ( LPGN ), Université de Nantes ( UN ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'études spatiales et d'instrumentation en astrophysique ( LESIA ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Centre National de la Recherche Scientifique ( CNRS ), German Aerospace Center ( DLR ), Laboratoire inter-universitaire des systèmes atmosphèriques ( LISA ), Institut national des sciences de l'Univers ( INSU - CNRS ) -Université Paris Diderot - Paris 7 ( UPD7 ) -Université Paris-Est Créteil Val-de-Marne - Paris 12 ( UPEC UP12 ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Atmosphères, Milieux, Observations Spatiales ( LATMOS ), Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Mullard Space Science Laboratory ( MSSL ), University College of London [London] ( UCL ), Laboratoire d'astrophysique de l'observatoire de Besançon ( LAOB ), Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Franche-Comté ( UFC ), SRON Netherlands Institute for Space Research ( SRON ), Institut de Planétologie et d'Astrophysique de Grenoble ( IPAG ), Observatoire des Sciences de l'Univers de Grenoble ( OSUG ), Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ) -Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ) -Centre National de la Recherche Scientifique ( CNRS ), NASA Goddard Space Flight Center ( GSFC ), Southwest Research Institute [San Antonio] ( SwRI ), University of California [Santa Cruz] ( UCSC ), Jet Propulsion Laboratory ( JPL ), NASA-California Institute of Technology ( CALTECH ), Astrophysique Interactions Multi-échelles ( AIM - UMR 7158 - UMR E 9005 ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Paris Diderot - Paris 7 ( UPD7 ), Washington State University ( WSU ), Massachusetts Institute of Technology ( MIT ), Johns Hopkins University Applied Physics Laboratory [Laurel, MD] ( APL ), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Université de Franche-Comté (UFC)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)
Subjects: Exploration of Saturn, Ocean, Solar System, [PHYS.ASTR.EP]Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], 7. Clean energy, Missions, Space exploration, Astrobiology, symbols.namesake, Enceladus, Interior, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], Atmosphere, Institut für Physik und Astronomie, Astronomy, Astronomy and Astrophysics, Planetengeologie, Surface, [ PHYS.PHYS.PHYS-AO-PH ] Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], 13. Climate action, Space and Planetary Science, symbols, Titan (rocket family), Titan, Geology
Abstract: International audience; Saturn's moons, Titan and Enceladus, are two of the Solar System's most enigmatic bodies and are prime targets for future space exploration. Titan provides an analogue for many processes relevant to the Earth, more generally to outer Solar System bodies, and a growing host of newly discovered icy exoplanets. Processes represented include: atmospheric dynamics, complex organic chemistry, meteorological cycles (with methane as a working fluid), astrobiology, surface liquids and lakes, geology, fluvial and aeolian erosion, and interactions with an external plasma environment. In addition, exploring Enceladus over multiple targeted flybys will give us a unique opportunity to further study the most active icy moon in our Solar System as revealed by Cassini and to analyse in situ its active plume with highly capable instrumentation addressing its complex chemistry and dynamics. Enceladus' plume likely represents the most accessible samples from an extra-terrestrial liquid water environment in the Solar system, which has far reaching implications for many areas of planetary and biological science. Titan with its massive atmosphere and Enceladus with its active plume are prime planetary objects in the Outer Solar System to perform in situ investigations. In the present paper, we describe the science goals and key measurements to be performed by a future exploration mission involving a Saturn-Titan orbiter and a Titan balloon, which was proposed to ESA in response to the call for definition of the science themes of the next Large-class mission in 2013. The mission scenario is built around three complementary science goals: (A) Titan as an Earth-like system; (B) Enceladus as an active cryovolcanic moon; and (C) Chemistry of Titan and Enceladus – clues for the origin of life. The proposed measurements would provide a step change in our understanding of planetary processes and evolution, with many orders of magnitude improvement in temporal, spatial, and chemical resolution over that which is possible with Cassini-Huygens. This mission concept builds upon the successes of Cassini-Huygens and takes advantage of previous mission heritage in both remote sensing and in-situ measurement technologies.
Published: 2014

38. Result of the MICROSCOPE weak equivalence principle test

Author: Pierre Touboul, Gilles Métris, Manuel Rodrigues, Joel Bergé, Alain Robert, Quentin Baghi, Yves André, Judicael Bedouet, Damien Boulanger, Stefanie Bremer, Patrice Carle, Ratana Chhun, Bruno Christophe, Valerio Cipolla, Thibault Damour, Pascale Danto, Louis Demange, Hansjoerg Dittus, Océane Dhuicque, Pierre Fayet, Bernard Foulon, Pierre-Yves Guidotti, Daniel Hagedorn, Emilie Hardy, Phuong-Anh Huynh, Patrick Kayser, Stephanie Lala, Claus Lämmerzahl, Vincent Lebat, Françoise Liorzou, Meike List, Frank Löffler, Isabelle Panet, Martin Pernot-Borràs, Laurent Perraud, Sandrine Pires, Benjamin Pouilloux, Pascal Prieur, Alexandre Rebray, Serge Reynaud, Benny Rievers, Hanns Selig, Laura Serron, Timothy Sumner, Nicolas Tanguy, Patrizia Torresi, Pieter Visser, ONERA, Université Paris Saclay [Palaiseau], ONERA-Université Paris-Saclay, Géoazur (GEOAZUR 7329), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), DPHY, ONERA, Université Paris Saclay [Châtillon], Centre National d'Études Spatiales [Toulouse] (CNES), ONERA, Université Paris Saclay [Châtillon], ONERA / DTIS, Université de Toulouse [Toulouse], ONERA-PRES Université de Toulouse, DLR Institute of Space Systems, German Aerospace Center (DLR), Institut des Hautes Études Scientifiques (IHES), IHES, Laboratoire de physique de l'ENS - ENS Paris (LPENS), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Département de Physique de l'ENS-PSL, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Centre de Physique Théorique [Palaiseau] (CPHT), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), DTIS, ONERA, Université Paris Saclay [Palaiseau], Institut de Physique du Globe de Paris (IPGP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS), École nationale des sciences géographiques (ENSG), Institut National de l'Information Géographique et Forestière [IGN] (IGN)-Université Gustave Eiffel, Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Kastler Brossel (LKB [Collège de France]), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Collège de France (CdF (institution))-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
Subjects: High Energy Physics - Theory, analyse de données, Physics and Astronomy (miscellaneous), equivalence principle: validity test, satellite, Relativité générale, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), space mission, General Relativity and Quantum Cosmology, principe d'équivalence, [SPI]Engineering Sciences [physics], experimental gravitation, general relativity, stochastic, platinum, Instrumentation and Methods for Astrophysics (astro-ph.IM), MICROSCOPE, [PHYS]Physics [physics], Eötvös parameter, acceleration, gravitation expérimentale, space accelerometers, error: statistical, paramètre d'Eovos, High Energy Physics - Theory (hep-th), equivalence principle, gravitation, mission spatiale, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], Astrophysics - Instrumentation and Methods for Astrophysics, titanium: alloy
Abstract: The space mission MICROSCOPE dedicated to the test of the Equivalence Principle (EP) operated from April 25, 2016 until the deactivation of the satellite on October 16, 2018. In this analysis we compare the free-fall accelerations ($a_{\rm A}$ and $a_{\rm B}$) of two test masses in terms of the E\"otv\"os parameter $\eta({\rm{A, B}}) = 2 \frac{a_{\rm A}- a_{\rm B}}{a_{\rm A}+ a_{\rm B}}$. No EP violation has been detected for two test masses, made from platinum and titanium alloys, in a sequence of 19 segments lasting from 13 to 198 hours down to the limit of the statistical error which is smaller than $10^{-14}$ for $ \eta({\rm{Ti, Pt}})$. Accumulating data from all segments leads to $\eta({\rm{Ti, Pt}}) =[-1.5\pm{}2.3{\rm (stat)}\pm{}1.5{\rm (syst)}] \times{}10^{-15}$ showing no EP violation at the level of $2.7\times{}10^{-15}$ if we combine stochastic and systematic errors quadratically. This represents an improvement of almost two orders of magnitude with respect to the previous best such test performed by the E\"ot-Wash group. The reliability of this limit has been verified by comparing the free falls of two test masses of the same composition (platinum) leading to a null E\"otv\"os parameter with a statistical uncertainty of $1.1\times{}10^{-15}$., Comment: Class. Quantum Grav. 39 204009
Published: 2022

39. Iron Metabolism Regulation in Females and Males Exposed to Simulated Microgravity: results from the Randomized Trial AGBRESA

Author: Horeau, M., Report, M., Mulder, E., Tank, J., Frings-Meuthen, P., Armbrecht, G., Loréal, O., Derbré, F., Jonchère, Laurent, Nutrition, Métabolismes et Cancer (NuMeCan), Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Laboratoire Mouvement Sport Santé (M2S), Université de Rennes (UR)-École normale supérieure - Rennes (ENS Rennes)-Université de Brest (UBO)-Université de Rennes 2 (UR2)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique ), CHU Pontchaillou [Rennes], German Aerospace Center (DLR), Charité - UniversitätsMedizin = Charité - University Hospital [Berlin], and The AGBRESA study was funded by DLR, ESA (contractnumber: 4000113871/15/NL/PG), and NASA (contract number: 80JSC018P0078). Theanalyses related to this study were supported by grants from the French 'Centre Nationald'Etudes Spatiales' (CNES) and the Brittany Council. The authors thank ElisabettaAndermarcher for expert manuscript editing
Subjects: spaceflight, [SDV] Life Sciences [q-bio], [SDV.AEN] Life Sciences [q-bio]/Food and Nutrition, inflammation, [SDV]Life Sciences [q-bio], metals, trace elements, disuse, [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition
Abstract: International audience; BACKGROUND: Iron metabolism imbalance could contribute to physical deconditioning experienced by astronauts due to its essential role in energy metabolism, cellular respiration, and oxygen transport. OBJECTIVES: In this clinical exploratory study, we wanted to determine whether artificial gravity (AG) training modulated iron metabolism, red blood cell indices, and body lean mass in male and female healthy participants exposed to head-down tilt (HDT) bed rest, the reference ground-based model of microgravity. METHODS: We recruited 8 female and 16 male healthy participants who were all exposed to HDT bed rest for 60 days. In addition, they were assigned to three experimental groups (n = 8/each): controls, continuous AG training in a short-arm centrifuge (1×30 min/day), and intermittent AG training (6 × 5 min/day). RESULTS: The iron metabolism responses to simulated microgravity of AG training groups do not significantly differ from the responses of controls. Independently from AG, we found that both serum iron (+31.3%, P = 0.027) and transferrin saturation levels (+28.4%, P = 0.009) increased in males after 6 days of HDT bed rest, as well as serum hepcidin levels (+36.9% P = 0.005). The increase of transferrin saturation levels persisted after 57 days of HDT bed rest (+13.5%, P = 0.026), suggesting that long-term exposure to microgravity sustainably increases serum iron availability in males, and consequently the risk of iron excess or misdistribution. In females, 6 and 57 days of HDT bed rest did not significantly change serum iron, transferrin saturation, and hepcidin levels. CONCLUSIONS: The data from this exploratory study suggest that 1) AG training does not influence the iron metabolism responses to microgravity; 2) iron metabolism parameters, especially iron availability for cells, are significantly increased in males, but not in females, exposed to long-term simulated microgravity. Due to the small sample size of females, we nevertheless must be cautious before concluding that iron metabolism could differently respond to microgravity in females. Clinical trial registry number: DRKS00015677.
Published: 2022

40. JUpiter ICy moons Explorer (JUICE): An ESA mission to orbit Ganymede and to characterise the Jupiter system

Author: Leigh N. Fletcher, Norbert Krupp, Paolo Tortora, Olivier Grasset, Christian Erd, H. Hussmann, Michel Blanc, T. Van Hoolst, Jean-Pierre Lebreton, Ralf Jaumann, M. K. Dougherty, Athena Coustenis, Federico Tosi, Andrew J. Coates, Olga Prieto-Ballesteros, Dmitrij V. Titov, Emma J. Bunce, Pierre Drossart, Laboratoire de Planétologie et Géodynamique de Nantes ( LPGN ), Université de Nantes ( UN ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Space and Atmospheric Physics Group [London], Blackett Laboratory, Imperial College London-Imperial College London, Laboratoire d'études spatiales et d'instrumentation en astrophysique ( LESIA ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Centre National de la Recherche Scientifique ( CNRS ), European Space Research and Technology Centre ( ESTEC ), European Space Agency ( ESA ), Centre d'étude spatiale des rayonnements ( CESR ), Université Paul Sabatier - Toulouse 3 ( UPS ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Observatoire Midi-Pyrénées ( OMP ) -Centre National de la Recherche Scientifique ( CNRS ), Mullard Space Science Laboratory ( MSSL ), University College of London [London] ( UCL ), Department of Atmospheric, Oceanic and Planetary Physics [Oxford] ( AOPP ), University of Oxford [Oxford], German Aerospace Center ( DLR ), DLR Institute of Planetary Research, Max Planck Institute for Solar System Research ( MPS ), Laboratoire de Physique et Chimie de l'Environnement et de l'Espace ( LPC2E ), Institut national des sciences de l'Univers ( INSU - CNRS ) -Université d'Orléans ( UO ) -Centre National de la Recherche Scientifique ( CNRS ), Research and Scientific Support Department, ESTEC ( RSSD ), European Space Agency ( ESA ) -European Space Agency ( ESA ), Centro de Astrobiologia [Madrid] ( CAB ), Instituto Nacional de Técnica Aeroespacial ( INTA ) -Consejo Superior de Investigaciones Científicas [Spain] ( CSIC ), Istituto di Astrofisica e Planetologia Spaziali ( IAPS ), Istituto Nazionale di Astrofisica ( INAF ), Royal Observatory of Belgium [Brussels], Laboratoire de Planétologie et Géodynamique [UMR 6112] (LPG), Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), European Space Research and Technology Centre (ESTEC), European Space Agency (ESA), Centre d'étude spatiale des rayonnements (CESR), Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Mullard Space Science Laboratory (MSSL), University College of London [London] (UCL), Department of Atmospheric, Oceanic and Planetary Physics [Oxford] (AOPP), German Aerospace Center (DLR), Max Planck Institute for Solar System Research (MPS), Max-Planck-Gesellschaft, Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Research and Scientific Support Department, ESTEC (RSSD), European Space Agency (ESA)-European Space Agency (ESA), Centro de Astrobiologia [Madrid] (CAB), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Istituto di Astrofisica e Planetologia Spaziali - INAF (IAPS), Istituto Nazionale di Astrofisica (INAF), Royal Observatory of Belgium [Brussels] (ROB), O. Grasset, M.K. Dougherty, A. Cousteni, E.J. Bunce, C. Erd, D. Titov, M. Blanc, A. Coate, P. Drossart, L.N. Fletcher, H. Hussmann, R. Jaumann, N. Krupp, J.-P. Lebreton, O. Prieto-Ballestero, P. Tortora, F. Tosi, T. Van Hoolst, Agence Spatiale Européenne = European Space Agency (ESA), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), University of Oxford, Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research (MPS), and Agence Spatiale Européenne = European Space Agency (ESA)-Agence Spatiale Européenne = European Space Agency (ESA)
Subjects: Moons of Jupiter, 010504 meteorology & atmospheric sciences, Jovian system, Gas giant, 01 natural sciences, Astrobiology, Jupiter, symbols.namesake, Exploration of Jupiter, Planet, Ganymede, 0103 physical sciences, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, Space exploration, Callisto, Astronomy, Astronomy and Astrophysics, Icy moon, Galilean moons, Galileian Satellite, 13. Climate action, Space and Planetary Science, [SDU]Sciences of the Universe [physics], Physics::Space Physics, symbols, Natural satellite, Astrophysics::Earth and Planetary Astrophysics, Jupiter exploration, Europa, Geology, [ SDU ] Sciences of the Universe [physics]
Abstract: International audience; Past exploration of Jupiter's diverse satellite system has forever changed our understanding of the unique environments to be found around gas giants, both in our solar system and beyond. The detailed investigation of three of Jupiter's Galilean satellites (Ganymede, Europa, and Callisto), which are believed to harbour subsurface water oceans, is central to elucidating the conditions for habitability of icy worlds in planetary systems in general. The study of the Jupiter system and the possible existence of habitable environments offer the best opportunity for understanding the origins and formation of the gas giants and their satellite systems. The JUpiter ICy moons Explorer (JUICE) mission, selected by ESA in May 2012 to be the first large mission within the Cosmic Vision Program 2015-2025, will perform detailed investigations of Jupiter and its system in all their inter-relations and complexity with particular emphasis on Ganymede as a planetary body and potential habitat. The investigations of the neighbouring moons, Europa and Callisto, will complete a comparative picture of the Galilean moons and their potential habitability. Here we describe the scientific motivation for this exciting new European-led exploration of the Jupiter system in the context of our current knowledge and future aspirations for exploration, and the paradigm it will bring in the study of giant (exo) planets in general. [All rights reserved Elsevier].
Published: 2013

41. The Resolved Asteroid Program - Size, shape, and pole of (52) Europa

Author: Clark R. Chapman, William J. Merline, Peter Tamblyn, Benoit Carry, Jack D. Drummond, Christophe Dumas, Anders Erikson, Al Conrad, Julian C. Christou, Stefano Mottola, G. Rousseau, C. Neyman, G. Casalnuovo, Mikko Kaasalainen, Josef Ďurech, Raoul Behrend, B. Chinaglia, Southwest Research Institute [Boulder] ( SwRI ), Starfire Optical Range [AFRL] ( SOR ), United States Air Force ( USAF ), Institut de Mécanique Céleste et de Calcul des Ephémérides ( IMCCE ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Observatoire de Paris-Université de Lille-Centre National de la Recherche Scientifique ( CNRS ), European Space Astronomy Centre ( ESA ), European Space Astronomy Centre, Max-Planck-Institut für Astronomie ( MPIA ), W.M. Keck Observatory, European Southern Observatory ( ESO ), Department of Mathematics [Tampere], Tampere University of Technology [Tampere] ( TUT ), DLR Institute of Planetary Research, German Aerospace Center ( DLR ), Astronomical Institute of Charles University, Charles University [Prague], Courbes de rotation d'astéroïdes, de comètes et d'étoiles variables ( CdR & CdL group ), CdR & CdL group, Geneva Observatory, University of Geneva [Switzerland], Eurac Observatory, Gemini Observatory, Southwest Research Institute [Boulder] (SwRI), Starfire Optical Range [AFRL] (SOR), United States Air Force (USAF), Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), European Space Astronomy Centre (ESAC), Agence Spatiale Européenne = European Space Agency (ESA), Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, European Southern Observatory (ESO), Tampere University of Technology [Tampere] (TUT), German Aerospace Center (DLR), Charles University [Prague] (CU), Courbes de rotation d'astéroïdes, de comètes et d'étoiles variables (CdR & CdL group), Université de Genève = University of Geneva (UNIGE), Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), and European Space Agency (ESA)
Subjects: Rotation period, Adaptative optics, [PHYS.ASTR.EP]Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], media_common.quotation_subject, [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], FOS: Physical sciences, Asteroids Adaptive optics Photometry Occultations, 01 natural sciences, law.invention, Photometry, 010309 optics, Telescope, Impact crater, law, 0103 physical sciences, 10. No inequality, 010303 astronomy & astrophysics, media_common, Physics, Earth and Planetary Astrophysics (astro-ph.EP), Ecliptic, Astronomy, Astronomy and Astrophysics, [ SDU.ASTR.EP ] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Ellipsoid, Asteroids, Astron, [ PHYS.ASTR.EP ] Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Space and Planetary Science, Sky, Asteroid, Occultations, Astrophysics - Earth and Planetary Astrophysics
Abstract: With the adaptive optics (AO) system on the 10 m Keck-II telescope, we acquired a high quality set of 84 images at 14 epochs of asteroid (52) Europa on 2005 January 20. The epochs covered its rotation period and, by following its changing shape and orientation on the plane of sky, we obtained its triaxial ellipsoid dimensions and spin pole location. An independent determination from images at three epochs obtained in 2007 is in good agreement with these results. By combining these two data sets, along with a single epoch data set obtained in 2003, we have derived a global fit for (52) Europa of diameters (379x330x249) +/- (16x8x10) km, yielding a volume-equivalent spherical-diameter of 315 +/- 7 km, and a rotational pole within 7 deg of [RA; Dec] = [257,+12] in an Equatorial J2000 reference frame (ECJ2000: 255,+35). Using the average of all mass determinations available forEuropa, we derive a density of 1.5 +/- 0.4, typical of C-type asteroids. Comparing our images with the shape model of Michalowski et al. (A&A 416, 2004), derived from optical lightcurves, illustrates excellent agreement, although several edge features visible in the images are not rendered by the model. We therefore derived a complete 3-D description of Europa's shape using the KOALA algorithm by combining our imaging epochs with 4 stellar occultations and 49 lightcurves. We use this 3-D shape model to assess these departures from ellipsoidal shape. Flat facets (possible giant craters) appear to be less distinct on (52) Europa than on other C-types that have been imaged in detail. We show that fewer giant craters, or smaller craters, is consistent with its expected impact history. Overall, asteroid (52) Europa is still well modeled as a smooth triaxial ellipsoid with dimensions constrained by observations obtained over several apparitions., Accepted for publication in Icarus
Published: 2013
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42. THERMAL TOMOGRAPHY OF ASTEROID SURFACE STRUCTURE

Author: Drube, Line [German Aerospace Center (DLR) Institute of Planetary Research, Rutherfordstrasse 2, D-12489 Berlin (Germany)]
Published: 2016
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43. Supporting Mars exploration: BIOMEX in Low Earth Orbit and further astrobiological studies on the Moon using Raman and PanCam technology

Author: Thomas Leya, Ulrich Szewzyk, Mickael Baqué, Elke Rabbow, Jörg Fritz, René Demets, Pascale Ehrenfreund, Laura Zucconi, Laura Selbmann, Jean-Pierre de Vera, Paloma Serrano, Björn Huwe, C. Meyer, Andreas Elsaesser, Heinz-Wilhelm Hübers, Caroline Lange, Ralf Möller, F. J. Sánchez, Silvano Onofri, Daniela Billi, J. Meessen, Dana Grunow, Jochen Jänchen, Frances Westall, Nicole Schmitz, N. Feyh, Natalia Kozyrovska, Bernard Foing, Maria Bohmeier, Rosa de la Torre Noetzel, Ralf Jaumann, Tilman Spohn, Petra Rettberg, Thomas Berger, Sieglinde Ott, Charles S. Cockell, Dirk Wagner, Ute Boettger, Howell G. M. Edwards, Günther Reitz, Casey Bryce, Jasmin Joshi, Gerda Horneck, DLR Institut für Planetenforschung, Deutsches Zentrum für Luft- und Raumfahrt [Berlin] ( DLR ), Instituto Nacional de Técnica Aeroespacial ( INTA ), Technische Universität Berlin ( TUB ), Università degli Studi di Roma Tor Vergata [Roma], Institut des Biomolécules Max Mousseron [Pôle Chimie Balard] ( IBMM ), Ecole Nationale Supérieure de Chimie de Montpellier ( ENSCM ) -Université de Montpellier ( UM ) -Centre National de la Recherche Scientifique ( CNRS ), Deutsches Zentrum für Luft- und Raumfahrt [Köln] ( DLR ), Centre de biophysique moléculaire ( CBM ), Université d'Orléans ( UO ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Centre National de la Recherche Scientifique ( CNRS ), Technische Hochschule Wildau ( TH Wildau ), Centre Pluridisciplinaire Textes et Cultures ( CPTC ), Université de Bourgogne ( UB ), Museum für Naturkunde [Berlin], Università degli studi della Tuscia [Viterbo], National Academy of Sciences of Ukraine ( NASU ), Fraunhofer - Institut für Biomedizinische Technik ( IBMT ), European Space Research and Technology Centre ( ESTEC ), European Space Agency ( ESA ), School of Physics and Astronomy [Edinburgh], University of Edinburgh, Design of Distributed Operating Systems ( SOLIDOR ), Institut de Recherche en Informatique et Systèmes Aléatoires ( IRISA ), Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -Institut National de Recherche en Informatique et en Automatique ( Inria ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Rennes 1 ( UR1 ), Université de Rennes ( UNIV-RENNES ) -Université de Rennes ( UNIV-RENNES ) -Institut National des Sciences Appliquées - Rennes ( INSA Rennes ) -Institut National de Recherche en Informatique et en Automatique ( Inria ) -Centre National de la Recherche Scientifique ( CNRS ) -INRIA Rennes, Institut National de Recherche en Informatique et en Automatique ( Inria ), GeoForschungsZentrum - Helmholtz-Zentrum Potsdam ( GFZ ), Joint Center for Structural Genomics ( JCSG ), Stanford University [Stanford], Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung ( AWI ), University of Sheffield [Sheffield], University of Bradford, Universität Potsdam, Leiden Observatory [Leiden], Universiteit Leiden [Leiden], Space Policy Institute [Washington], George Washington University ( GW ), Heinrich-Heine-Universität Düsseldorf [Düsseldorf], DLR Institute of Planetary Research, German Aerospace Center ( DLR ), Deutsches Zentrum für Luft- und Raumfahrt [Berlin] (DLR), Instituto Nacional de Técnica Aeroespacial (INTA), Technische Universität Berlin (TU), Institut des Biomolécules Max Mousseron [Pôle Chimie Balard] (IBMM), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM), Deutsches Zentrum für Luft- und Raumfahrt [Köln] (DLR), Centre de biophysique moléculaire (CBM), Université d'Orléans (UO)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Technische Hochschule Wildau (TH Wildau), Centre Pluridisciplinaire Textes et Cultures (CPTC), Université de Bourgogne (UB), National Academy of Sciences of Ukraine (NASU), Fraunhofer Institute for Biomedical Engineering [Sulzbach] (Fraunhofer IBMT), Fraunhofer (Fraunhofer-Gesellschaft), European Space Research and Technology Centre (ESTEC), European Space Agency (ESA), SUPA School of Physics and Astronomy [Edinburgh], GeoForschungsZentrum - Helmholtz-Zentrum Potsdam (GFZ), Joint Center for Structural Genomics (JCSG), Stanford University, Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), The George Washington University (GW), Heinrich Heine Universität Düsseldorf = Heinrich Heine University [Düsseldorf], German Aerospace Center (DLR), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Université d'Orléans (UO)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Design of Distributed Operating Systems (SOLIDOR), Institut de Recherche en Informatique et Systèmes Aléatoires (IRISA), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-INRIA Rennes, Institut National de Recherche en Informatique et en Automatique (Inria), and Publica
Subjects: BIOMEX, Settore BIO/01, Mars, 550 - Earth sciences, Life on Mars, Exploration of Mars, 01 natural sciences, 7. Clean energy, Space exploration, Astrobiology, Lunar Lander, 03 medical and health sciences, 0103 physical sciences, International Space Station, Low Earth Orbit, Biosignature, Space research, Moon, 010303 astronomy & astrophysics, Lunar lander, Instrumentation, Spectroscopy, 030304 developmental biology, 0303 health sciences, Institut für Physik und Astronomie, Astronomy and Astrophysics, Mars Exploration Program, Lithopanspermia, 13. Climate action, Space and Planetary Science, [SDU]Sciences of the Universe [physics], Environmental science, Extraterrestrial Environment, Exploration, [ SDU ] Sciences of the Universe [physics]
Abstract: International audience; The Low Earth Orbit (LEO) experiment Biology and Mars Experiment (BIOMEX) is an interdisciplinary and international space research project selected by ESA. The experiment will be accommodated on the space exposure facility EXPOSE-R2 on the International Space Station (ISS) and is foreseen to be launched in 2013. The prime objective of BIOMEX is to measure to what extent biomolecules, such as pigments and cellular components, are resistant to and able to maintain their stability under space and Mars-like conditions. The results of BIOMEX will be relevant for space proven biosignature definition and for building a biosignature data base (e.g. the proposed creation of an international Raman library). The library will be highly relevant for future space missions such as the search for life on Mars. The secondary scientific objective is to analyze to what extent terrestrial extremophiles are able to survive in space and to determine which interactions between biological samples and selected minerals (including terrestrial, Moon- and Mars analogs) can be observed under space and Mars-like conditions. In this context, the Moon will be an additional platform for performing similar experiments with negligible magnetic shielding and higher solar and galactic irradiation compared to LEO. Using the Moon as an additional astrobiological exposure platform to complement ongoing astrobiological LEO investigations could thus enhance the chances of detecting organic traces of life on Mars. We present a lunar lander mission with two related objectives: a lunar lander equipped with Raman and PanCam instruments which can analyze the lunar surface and survey an astrobiological exposure platform. This dual use of testing mission technology together with geo- and astrobiological analyses will significantly increase the science return, and support the human preparation objectives. It will provide knowledge about the Moon′s surface itself and, in addition, monitor the stability of life-markers, such as cells, cell components and pigments, in an extraterrestrial environment with much closer radiation properties to the surface of Mars. The combination of a Raman data base of these data together with data from LEO and space simulation experiments, will lead to further progress on the analysis and interpretation of data that we will obtain from future Moon and Mars exploration missions.
Published: 2012

44. RECOG RL01: correcting GRACE total water storage estimates for global lakes/reservoirs and earthquakes

Author: Helena Gerdener, Anita Thea Saraswati, Stefan Mayr, Kerstin Schulze, Laurent Longuevergne, Tonie van Dam, Christian Schwatke, Lennart Schawohl, Denise Dettmering, Laura Ellenbeck, Simon Deggim, Igor Klein, Jürgen Kusche, Annette Eicker, Olga Engels, University of Hamburg, Universität Bonn = University of Bonn, University of Luxembourg [Luxembourg], Technische Universität Munchen - Université Technique de Munich [Munich, Allemagne] (TUM), German Aerospace Center (DLR), Géosciences Rennes (GR), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS), German Research Foundation (DFG), Luxembourg National Research Fund FOR2630, University of Bonn, Technical University of Munich (TUM), Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES), and Deutsches Geodätisches Forschungsinstitut (DGFI-TUM)
Subjects: 010504 meteorology & atmospheric sciences, 0207 environmental engineering, 02 engineering and technology, 01 natural sciences, 03 medical and health sciences, Data assimilation, 0302 clinical medicine, Gravitational field, GRACE, GE1-350, Water cycle, [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology, 020701 environmental engineering, Dynamik der Landoberfläche, 0105 earth and related environmental sciences, correction for localized storage changes in lakes/reservoirs, 030304 developmental biology, 0303 health sciences, QE1-996.5, global terrestrial water storage, Water storage, Geology, 6. Clean water, ddc, Environmental sciences, GNSS applications, 13. Climate action, Climatology, General Earth and Planetary Sciences, Environmental science, Satellite, Scale (map), Surface water, 030217 neurology & neurosurgery
Abstract: Observations of changes in terrestrial water storage obtained from the satellite mission GRACE (Gravity Recovery and Climate Experiment) have frequently been used for water cycle studies and for the improvement of hydrological models by means of calibration and data assimilation. However, due to a low spatial resolution of the gravity field models spatially localized water storage changes, such as those occurring in lakes and reservoirs, cannot properly be represented in the GRACE estimates. As surface storage changes can represent a large part of total water storage, this leads to leakage effects and results in surface water signals becoming erroneously assimilated into other water storage compartments of neighboring model grid cells. As a consequence, a simple mass balance at grid/regional scale is not sufficient to deconvolve the impact of surface water on TWS. Furthermore, non-hydrology related phenomena contained in the GRACE time series, such as the mass redistribution caused by major earthquakes, hamper the use of GRACE for hydrological studies in affected regions. In this paper, we present the first release (RL01) of the global correction product RECOG (REgional COrrections for GRACE), which accounts for both the surface water (lakes & reservoirs, RECOG-LR) and earthquake effects (RECOG-EQ). RECOG-LR is computed from forward-modelling surface water volume estimates derived from satellite altimetry and (optical) remote sensing and allows both a removal of these signals from GRACE and a re-location of the mass change to its origin within the outline of the lakes/reservoirs. The earthquake correction RECOG-EQ includes both the co-seismic and post-seismic signals of two major earthquakes with magnitudes above 9 Mw. We can show that applying the correction dataset (1) reduces the GRACE signal variability by up to 75 % around major lakes and explains a large part of GRACE seasonal variations and trends, (2) avoids the introduction of spurious trends caused by leakage signals of nearby lakes when calibrating/assimilating hydrological models with GRACE, even in neighboring river basins, and (3) enables a clearer detection of hydrological droughts in areas affected by earthquakes. A first validation of the corrected GRACE time series using GPS-derived vertical station displacements shows a consistent improvement of the fit between GRACE and GNSS after applying the correction. Data are made available as open access via the Pangea database (RECOG-LR: Deggim et al. (2020a) https://doi.org/10.1594/PANGAEA.921851; RECOG-EQ: Gerdener et al. (2020b, under revision), https://doi.pangaea.de/10.1594/PANGAEA.921923).
Published: 2021

45. New and updated convex shape models of asteroids based on optical data from a large collaboration network

Author: J. Hanuš, J. Ďurech, D. A. Oszkiewicz, R. Behrend, B. Carry, M. Delbo, O. Adam, V. Afonina, R. Anquetin, P. Antonini, L. Arnold, M. Audejean, P. Aurard, M. Bachschmidt, B. Baduel, E. Barbotin, P. Barroy, P. Baudouin, L. Berard, N. Berger, L. Bernasconi, J-G. Bosch, S. Bouley, I. Bozhinova, J. Brinsfield, L. Brunetto, G. Canaud, J. Caron, F. Carrier, G. Casalnuovo, S. Casulli, M. Cerda, L. Chalamet, S. Charbonnel, B. Chinaglia, A. Cikota, F. Colas, J.-F. Coliac, A. Collet, J. Coloma, M. Conjat, E. Conseil, R. Costa, R. Crippa, M. Cristofanelli, Y. Damerdji, A. Debackère, A. Decock, Q. Déhais, T. Déléage, S. Delmelle, C. Demeautis, M. Dróżdż, G. Dubos, T. Dulcamara, M. Dumont, R. Durkee, R. Dymock, A. Escalante del Valle, N. Esseiva, R. Esseiva, M. Esteban, T. Fauchez, M. Fauerbach, M. Fauvaud, S. Fauvaud, E. Forné, C. Fournel, D. Fradet, J. Garlitz, O. Gerteis, C. Gillier, M. Gillon, R. Giraud, J.-P. Godard, R. Goncalves, Hiroko Hamanowa, Hiromi Hamanowa, K. Hay, S. Hellmich, S. Heterier, D. Higgins, R. Hirsch, G. Hodosan, M. Hren, A. Hygate, N. Innocent, H. Jacquinot, S. Jawahar, E. Jehin, L. Jerosimic, A. Klotz, W. Koff, P. Korlevic, E. Kosturkiewicz, P. Krafft, Y. Krugly, F. Kugel, O. Labrevoir, J. Lecacheux, M. Lehký, A. Leroy, B. Lesquerbault, M. J. Lopez-Gonzales, M. Lutz, B. Mallecot, J. Manfroid, F. Manzini, A. Marciniak, A. Martin, B. Modave, R. Montaigut, J. Montier, E. Morelle, B. Morton, S. Mottola, R. Naves, J. Nomen, J. Oey, W. Ogłoza, M. Paiella, H. Pallares, A. Peyrot, F. Pilcher, J.-F. Pirenne, P. Piron, M. Polińska, M. Polotto, R. Poncy, J. P. Previt, F. Reignier, D. Renauld, D. Ricci, F. Richard, C. Rinner, V. Risoldi, D. Robilliard, D. Romeuf, G. Rousseau, R. Roy, J. Ruthroff, P. A. Salom, L. Salvador, S. Sanchez, T. Santana-Ros, A. Scholz, G. Séné, B. Skiff, K. Sobkowiak, P. Sogorb, F. Soldán, A. Spiridakis, E. Splanska, S. Sposetti, D. Starkey, R. Stephens, A. Stiepen, R. Stoss, J. Strajnic, J.-P. Teng, G. Tumolo, A. Vagnozzi, B. Vanoutryve, J. M. Vugnon, B. D. Warner, M. Waucomont, O. Wertz, M. Winiarski, M. Wolf, Charles University [Prague] (CU), Astronomical Institute of Charles University, Department of Physics [Helsinki], Falculty of Science [Helsinki], Helsingin yliopisto = Helsingfors universitet = University of Helsinki-Helsingin yliopisto = Helsingfors universitet = University of Helsinki, Geneva Observatory, Université de Genève = University of Geneva (UNIGE), European Space Astronomy Centre (ESAC), Agence Spatiale Européenne = European Space Agency (ESA), Joseph Louis LAGRANGE (LAGRANGE), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Observatoire de Bédoin, Observatoire de Chinon, Association des Utilisateurs de Détecteurs Electroniques, Laboratoire de Physique de la Matière Condensée - UR UPJV 2081 (LPMC), Université de Picardie Jules Verne (UPJV), Harfleur Observatory, Ressources des terroirs - UMR 8575, Centre National de la Recherche Scientifique (CNRS), Les Engarouines Observatory, Géosciences Paris Sud (GEOPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Chercheur indépendant, Laboratoire d'optique des solides (LOS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Observatoire Astronomique de l'Université de Genève (ObsGE), Centre de Recherche Saint-Antoine (UMRS893), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM), Association T60, Observatoire Midi-Pyrénées, Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France, Courbes de rotation d'astéroïdes, de comètes et d'étoiles variables (CdR & CdL group), CdR & CdL group, Physik-Institut, Universität Zürich [Zürich] = University of Zurich (UZH), Gestion environnementale et traitement biologique des déchets (UR GERE), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Observatorio de San Gervasi, Observatoire de Cabris, Observatoire astronomique de Strasbourg (ObAS), Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Observatorio Astronómico de Tradate, Observatoire N°139 d'Antibes, Observatoire de Haute-Provence (OHP), Institut Pythéas (OSU PYTHEAS), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Centre National de la Recherche Scientifique (CNRS), 138 Village-Neuf, Science et Ingénierie des Matériaux et Procédés (SIMaP ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Shed of Science Observatory, Association AstroQueyras, Laboratoire d’Optique Atmosphérique - UMR 8518 (LOA), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Observatoire du Bois de Bardon, Interactions et dynamique des environnements de surface (IDES), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Instituto de Ciências Exatas e Tecnológicas [Viçosa], Universidade Federal de Viçosa = Federal University of Viçosa (UFV), Hamanowa Astronomical Observatory, DLR Institut für Planetenforschung, Deutsches Zentrum für Luft- und Raumfahrt [Berlin] (DLR), European Southern Observatory (ESO), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Observatoire Chante-Perdrix, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut d'Astrophysique et de Géophysique [Liège], Université de Liège, Stazione Astronomica di Sozzago, Milieux aquatiques, écologie et pollutions (UR MALY), German Aerospace Center (DLR), Observatorio Montcabre, Observatorio Astronómico de Mallorca (OAM), Observatorio Astronómico de Mallorca, Kingsgrove Observatory, Gestion Territoriale de l'Eau et de l'environnement (UMR GESTE), École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Organ Mesa Observatory, Astronomical Observatory [Poznan], Adam Mickiewicz University in Poznań (UAM), Association des Utilisateurs de Détecteurs Electroniques (AUDE), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon, Laboratoire de Recherche sur la Réactivité des Solides (LRRS), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'intégration, du matériau au système (IMS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), Gnosca Observatory, DeKalb Observatory, Laboratoire de Physique Atmosphérique et Planétaire (LPAP), Observatoire astronomique des Makes, INAF - Osservatorio Astronomico di Padova (OAPD), Istituto Nazionale di Astrofisica (INAF), Argelander Institute for Astronomy (AlfA), Rheinische Friedrich-Wilhelms-Universität Bonn, Institute of Neuropathology, University hospital of Zurich [Zurich], Charles University [Prague], University of Helsinki-University of Helsinki, University of Geneva [Switzerland], European Space Agency (ESA), Université Nice Sophia Antipolis (... - 2019) (UNS), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique de la Matière Condensée (EA 2081), Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Université de Genève (UNIGE), Centre de Recherche Saint-Antoine (CR Saint-Antoine), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées, Universität Zürich [Zürich] (UZH), L2EP - Équipe Réseaux, Laboratoire d’Électrotechnique et d’Électronique de Puissance - EA 2697 (L2EP), Ecole Centrale de Lille-École Nationale Supérieure d'Arts et Métiers (ENSAM), Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Haute Etude d'Ingénieurs-Université de Lille-Ecole Centrale de Lille-École Nationale Supérieure d'Arts et Métiers (ENSAM), HESAM Université (HESAM)-HESAM Université (HESAM)-Haute Etude d'Ingénieurs-Université de Lille, Science et Ingénierie des Matériaux et Procédés (SIMaP), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Observatoire Midi-Pyrénées and Association T60, Laboratoire de photonique et de nanostructures (LPN), Universidade Federal de Vicosa (UFV), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre d'études de chimie métallurgique (CECM), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), University of St Andrews. School of Physics and Astronomy, Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD), Laboratoire d’Électrotechnique et d’Électronique de Puissance - ULR 2697 (L2EP), Centrale Lille-Haute Etude d'Ingénieurs-Université de Lille-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Centrale Lille-Haute Etude d'Ingénieurs-Université de Lille-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut de Recherche pour le Développement (IRD), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), National Science Centre (Poland), Czech Science Foundation, Centre National D'Etudes Spatiales (France), Charles University [Prague] [CU], European Space Astronomy Centre [ESAC], Joseph Louis LAGRANGE [LAGRANGE], Institut de Recherches Subatomiques [IReS], Laboratoire d'Annecy de Physique des Particules [LAPP], Géosciences Paris Sud [GEOPS], Laboratoire d'optique des solides [LOS], Observatoire Astronomique de l'Université de Genève [ObsGE], Gestion environnementale et traitement biologique des déchets [UR GERE], Observatoire astronomique de Strasbourg [ObAS], Science et Ingénierie des Matériaux et Procédés [SIMaP], Laboratoire d’Optique Atmosphérique - UMR 8518 [LOA], Interactions et dynamique des environnements de surface [IDES], Laboratoire de photonique et de nanostructures [LPN], European Southern Observatory [ESO], Institut de recherche en astrophysique et planétologie [IRAP], Laboratoire d'études spatiales et d'instrumentation en astrophysique [LESIA], Milieux aquatiques, écologie et pollutions [UR MALY], German Aerospace Center [DLR], Laboratoire de l'Accélérateur Linéaire [LAL], Université Claude Bernard Lyon 1 [UCBL], Laboratoire de Recherche sur la Réactivité des Solides [LRRS], Laboratoire de l'intégration, du matériau au système [IMS], Laboratoire de Physique Atmosphérique et Planétaire [LPAP], INAF - Osservatorio Astronomico di Padova [OAPD], Argelander Institute for Astronomy [AlfA], ITA, USA, GBR, FRA, DEU, and ESP
Subjects: Solar System, 010504 meteorology & atmospheric sciences, Computer science, media_common.quotation_subject, FOS: Physical sciences, Inverse transform sampling, 01 natural sciences, Gravitation, Photometry (optics), Methods: observational, 0103 physical sciences, QB Astronomy, observational [Methods], Shape optimization, asteroids: general / techniques: photometric / methods: observational / methods: numerical, 010303 astronomy & astrophysics, Scaling, QC, ComputingMilieux_MISCELLANEOUS, QB, 0105 earth and related environmental sciences, media_common, Earth and Planetary Astrophysics (astro-ph.EP), [PHYS]Physics [physics], numerical [Methods], Methods: numerical, photometric [Techniques], Minor planets, Astronomy, Astronomy and Astrophysics, 3rd-DAS, QC Physics, Minor planets, asteroids: general, Space and Planetary Science, Sky, Asteroid, Physics::Space Physics, minor planets, Astrophysics::Earth and Planetary Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], general [Asteroids], Techniques: photometric, Astrophysics - Earth and Planetary Astrophysics, general [minor planets, asteroids]
Abstract: Context. Asteroid modeling efforts in the last decade resulted in a comprehensive dataset of almost 400 convex shape models and their rotation states. These efforts already provided deep insight into physical properties of main-belt asteroids or large collisional families. Going into finer detail (e.g., smaller collisional families, asteroids with sizes 20 km) requires knowledge of physical parameters of more objects. Aims. We aim to increase the number of asteroid shape models and rotation states. Such results provide important input for further studies, such as analysis of asteroid physical properties in different populations, including smaller collisional families, thermophysical modeling, and scaling shape models by disk-resolved images, or stellar occultation data. This provides bulk density estimates in combination with known masses, but also constrains theoretical collisional and evolutional models of the solar system. Methods. We use all available disk-integrated optical data (i.e., classical dense-in-time photometry obtained from public databases and through a large collaboration network as well as sparse-in-time individual measurements from a few sky surveys) as input for the convex inversion method, and derive 3D shape models of asteroids together with their rotation periods and orientations of rotation axes. The key ingredient is the support of more that 100 observers who submit their optical data to publicly available databases. Results. We present updated shape models for 36 asteroids, for which mass estimates are currently available in the literature, or for which masses will most likely be determined from their gravitational influence on smaller bodies whose orbital deflections will be observed by the ESA Gaia astrometric mission. Moreover, we also present new shape model determinations for 250 asteroids, including 13 Hungarias and three near-Earth asteroids. The shape model revisions and determinations were enabled by using additional optical data from recent apparitions for shape optimization. © 2016 ESO., J.H. greatly appreciates the CNES post-doctoral fellowship program. J.H. and M.D. were supported by the project under the contract 11-BS56-008 (SHOCKS) of the French Agence National de la Recherche (ANR), JD by grant GACR 15-04816S of the Czech Science Foundation, DO by the grant NCN 2012/S/ST9/00022 of Polish National Science Center, and A. Marciniak by grant 2014/13/D/ST9/01818 of Polish National Science Center.
Published: 2016

46. Uranus Pathfinder: exploring the origins and evolution of Ice Giant planets

Author: Abigail Rymer, S. Kemble, Elias Roussos, Sebastien Hess, Benoît Noyelles, Imke de Pater, Nick Sergis, Glyn Collinson, Stas Barabash, Ravit Helled, Jared Leisner, Chris S. Arridge, Nicholas A Teanby, Baptiste Cecconi, Andy F. Cheng, Norbert Krupp, Andrew Bacon, Joachim Saur, Yves Langevin, Andrew Fazakerley, Steve Miller, Jaques Gustin, Matthew S. Tiscareno, Christopher T. Russell, Mathieu Barthelemy, Nadine Nettelmann, Richard Holme, Philippe Zarka, Ingo Müller-Wodarg, Apostolos A. Christou, Andrew J. Coates, Robert Ebert, Thomas P. Andert, Olivier Mousis, Sandrine Vinatier, Paul M. Schenk, Gerald Schubert, Laurent Lamy, Michael Guest, Craig B. Agnor, Régis Courtin, Daniel Gautier, Jan-Erik Wahlund, Cesar Bertucci, Ulrich R. Christensen, Pontus Brandt, Javier Martin-Torres, Adam Masters, Don Banfield, Silvia Tellmann, Elizabeth P. Turtle, Matthew M. Hedman, Frank Sohl, Mark Hofstadter, Leigh N. Fletcher, Özgür Karatekin, Chris Paranicas, Kunio M. Sayanagi, Nicolas André, Agustín Sánchez-Lavega, Tom Stallard, Kevin H. Baines, Eric Quémerais, Martin Pätzold, Supriya Chakrabarti, Marina Galand, L. Peacocke, Pierre Henri, John F. Cooper, Gabriel Tobie, Marta Entradas, Nicholas Achilleos, Michele K. Dougherty, Renée Prangé, C. P. Chaloner, Henrik Melin, Geraint H. Jones, Jonathan J. Fortney, Edward C. Sittler, Mullard Space Science Laboratory (MSSL), University College of London [London] (UCL), School of Physics and Astronomy [London], Queen Mary University of London (QMUL), Centre d'étude spatiale des rayonnements (CESR), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Department of Atmospheric, Oceanic and Planetary Physics [Oxford] (AOPP), University of Oxford [Oxford], Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Univers, Transport, Interfaces, Nanostructures, Atmosphère et environnement, Molécules (UMR 6213) (UTINAM), Université de Franche-Comté (UFC)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), University of Rostock [Germany], Institute of Geophysics and Planetary Physics [Los Angeles] (IGPP), University of California [Los Angeles] (UCLA), University of California-University of California, Department of Physics and Astronomy [Leicester], University of Leicester, Cornell University, Laboratoire de Planétologie et Géodynamique UMR6112 (LPG), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Nantes - Faculté des Sciences et des Techniques, Université de Nantes (UN)-Université de Nantes (UN)-Université d'Angers (UA), Astrium [Stevenage], EADS - European Aeronautic Defense and Space, Department of Physics and Astronomy [UCL London], Universität der Bundeswehr München [Neubiberg], Swedish Institute of Space Physics [Uppsala] (IRF), Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Centre National d'Études Spatiales [Toulouse] (CNES)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Instituto de Astronomía y Física del Espacio [Buenos Aires] (IAFE), Universidad de Buenos Aires [Buenos Aires] (UBA)-Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET), Johns Hopkins University Applied Physics Laboratory [Laurel, MD] (APL), Center for Space Physics [Boston] (CSP), Boston University [Boston] (BU), Max Planck Institute for Solar System Research (MPS), Max-Planck-Gesellschaft, Armagh Observatory [Armagh], NASA Goddard Space Flight Center (GSFC), Blackett Laboratory, Imperial College London, Southwest Research Institute [San Antonio] (SwRI), Department of Science and Technology Studies [London] (STS), University of California [Santa Cruz] (UCSC), University of California, Laboratoire de Physique Atmosphérique et Planétaire (LPAP), Université de Liège, Department of Earth and Space Sciences [Los Angeles], University of Colorado [Boulder], School of Environmental Sciences [Liverpool], University of Liverpool, Royal Observatory of Belgium [Brussels], University of Iowa [Iowa City], Centro de Astrobiologia [Madrid] (CAB), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Spain] (CSIC), Space Research Centre [Leicester], Fondation Universitaire Notre Dame de la Paix (FUNDP), Facultés Universitaires Notre-Dame de la Paix, Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Department of Astronomy [Berkeley], University of California [Berkeley], Rhenish Institute for Environmental Research (RIU), University of Cologne, HEPPI - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), University of the Basque Country/Euskal Herriko Unibertsitatea (UPV/EHU), Institute for Geophysics and Meteorology [Köln] (IGM), Lunar and Planetary Institute [Houston] (LPI), Office for Space Research and Applications [Athens], Academy of Athens, DLR Institute of Planetary Research, German Aerospace Center (DLR), School of Earth Sciences [Bristol], University of Bristol [Bristol], Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), University of Oxford, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), University of Rostock, University of California (UC)-University of California (UC), Cornell University [New York], Laboratoire de Planétologie et Géodynamique [UMR 6112] (LPG), Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de Planétologie et d'Astrophysique de Grenoble (IPAG ), Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET)-Universidad de Buenos Aires [Buenos Aires] (UBA), Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research (MPS), University of California [Santa Cruz] (UC Santa Cruz), University of California (UC), Royal Observatory of Belgium [Brussels] (ROB), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Facultés Universitaires Notre Dame de la Paix (FUNDP), University of California [Berkeley] (UC Berkeley), HELIOS - LATMOS, Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, California Institute of Technology (CALTECH)-NASA, Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Instituto Nacional de Técnica Aeroespacial (INTA), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Universität der Bundeswehr München [Neubiberg] = Bundeswehr University, Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Consejo Superior de Investigaciones Científicas [Spain] (CSIC)-Instituto Nacional de Técnica Aeroespacial (INTA), Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Observatoire de Paris, Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Mullard Space Science Laboratory ( MSSL ), University College of London [London] ( UCL ), Queen Mary University of London ( QMUL ), Centre d'étude spatiale des rayonnements ( CESR ), Université Paul Sabatier - Toulouse 3 ( UPS ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Observatoire Midi-Pyrénées ( OMP ) -Centre National de la Recherche Scientifique ( CNRS ), Jet Propulsion Laboratory ( JPL ), NASA-California Institute of Technology ( CALTECH ), Department of Atmospheric, Oceanic and Planetary Physics [Oxford] ( AOPP ), Laboratoire d'études spatiales et d'instrumentation en astrophysique ( LESIA ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Centre National de la Recherche Scientifique ( CNRS ), Institut d'astrophysique spatiale ( IAS ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Univers, Transport, Interfaces, Nanostructures, Atmosphère et environnement, Molécules ( UTINAM ), Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Franche-Comté ( UFC ), Institute of Geophysics and Planetary Physics [Los Angeles] ( IGPP ), University of California at Los Angeles [Los Angeles] ( UCLA ), Laboratoire de Planétologie et Géodynamique de Nantes ( LPGN ), Université de Nantes ( UN ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Swedish Institute of Space Physics [Uppsala] ( IRF ), Institut de Planétologie et d'Astrophysique de Grenoble ( IPAG ), Observatoire des Sciences de l'Univers de Grenoble ( OSUG ), Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ) -Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ) -Centre National de la Recherche Scientifique ( CNRS ), Instituto de Astronomia y Fisica del Espacio ( IAFE ), Consejo Nacional de Investigaciones Científicas y Técnicas ( CONICET ) -Universidad de Buenos Aires [Buenos Aires], Johns Hopkins University Applied Physics Laboratory [Laurel, MD] ( APL ), Center for Space Physics [Boston] ( CSP ), Boston University [Boston] ( BU ), Max Planck Institute for Solar System Research ( MPS ), NASA Goddard Space Flight Center ( GSFC ), Southwest Research Institute [San Antonio] ( SwRI ), Department of Science and Technology Studies [London] ( STS ), University of California [Santa Cruz] ( UCSC ), Laboratoire de Physique Atmosphérique et Planétaire ( LPAP ), University of Colorado Boulder [Boulder], University of Iowa [Iowa], Centro de Astrobiologia [Madrid] ( CAB ), Instituto Nacional de Técnica Aeroespacial ( INTA ) -Consejo Superior de Investigaciones Científicas [Spain] ( CSIC ), Fondation Universitaire Notre Dame de la Paix ( FUNDP ), Institut de Mécanique Céleste et de Calcul des Ephémérides ( IMCCE ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Observatoire de Paris-Université de Lille-Centre National de la Recherche Scientifique ( CNRS ), Astronomy Department [Berkeley], Rhenish Institute for Environmental Research ( RIU ), Laboratoire Atmosphères, Milieux, Observations Spatiales ( LATMOS ), Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), University of the Basque Country/Euskal Herriko Unibertsitatea ( UPV/EHU ), Institute for Geophysics and Meteorology [Köln] ( IGM ), Lunar and Planetary Institute [Houston] ( LPI ), and German Aerospace Center ( DLR )
Subjects: Solar System, 010504 meteorology & atmospheric sciences, [PHYS.ASTR.EP]Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Ciencias Físicas, Uranus, [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], interior, Natural satellite, 7. Clean energy, 01 natural sciences, Astrobiology, Ice Giant, Orbiter, Neptune, Planet, 0103 physical sciences, 010303 astronomy & astrophysics, ICE GIANT, 0105 earth and related environmental sciences, Physics, [PHYS]Physics [physics], natural satellite, ice giants, Nice model, Giant planet atmosphere, Astronomy, Astronomy and Astrophysics, Planetary system, [ SDU.ASTR.EP ] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Ring system, Dynamo, Astronomía, [ PHYS.ASTR.EP ] Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], URANUS, 13. Climate action, Space and Planetary Science, Exploration of Uranus, Magnetosphere, GIANT PLANET ATMOSPHERE, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], ORBITER, CIENCIAS NATURALES Y EXACTAS, Ice giant
Abstract: The “Ice Giants” Uranus and Neptune are a different class of planet compared to Jupiter and Saturn. Studying these objects is important for furthering our understanding of the formation and evolution of the planets, and unravelling the fundamental physical and chemical processes in the Solar System. The importance of filling these gaps in our knowledge of the Solar System is particularly acute when trying to apply our understanding to the numerous planetary systems that have been discovered around other stars. The Uranus Pathfinder (UP) mission thus represents the quintessential aspects of the objectives of the European planetary community as expressed in ESA’s Cosmic Vision 2015–2025. UP was proposed to the European Space Agency’s M3 call for medium-class missions in 2010 and proposed to be the first orbiter of an Ice Giant planet. As the most accessible Ice Giant within the M-class mission envelope Uranus was identified as the mission target. Although not selected for this call the UP mission concept provides a baseline framework for the exploration of Uranus with existing low-cost platforms and underlines the need to develop power sources suitable for the outer Solar System. The UP science case is based around exploring the origins, evolution, and processes at work in Ice Giant planetary systems. Three broad themes were identified: (1) Uranus as an Ice Giant, (2) An Ice Giant planetary system, and (3) An asymmetric magnetosphere. Due to the long interplanetary transfer from Earth to Uranus a significant cruise-phase science theme was also developed. The UP mission concept calls for the use of a Mars Express/Rosetta-type platform to launch on a Soyuz–Fregat in 2021 and entering into an eccentric polar orbit around Uranus in the 2036–2037 timeframe. The science payload has a strong heritage in Europe and beyond and requires no significant technology developments. Fil: Arridge, Christopher S.. University College London; Estados Unidos Fil: Agnor, Craig B.. Queen Mary University of London; Reino Unido Fil: Andre, Nicolas. Centre National de la Recherche Scientifique; Francia Fil: Baines, Kevin H.. National Aeronautics And Space Administration; Estados Unidos Fil: Fletcher, Leigh N.. University of Oxford; Reino Unido Fil: Gautier, Daniel. Centre National de la Recherche Scientifique. Observatoire de Paris; Francia Fil: Hofstadter, Mark D.. National Aeronautics And Space Administration; Estados Unidos Fil: Jones, Geraint H.. University College London; Estados Unidos Fil: Lamy, Laurent. Centre National de la Recherche Scientifique. Observatoire de Paris; Francia Fil: Langevin, Yves. Centre National de la Recherche Scientifique; Francia Fil: Mousis, Olivier. Centre National de la Recherche Scientifique; Francia Fil: Nettelmann, Nadine. Universitat Rostock; Alemania Fil: Russell, Christopher T.. University of California at Los Angeles; Estados Unidos Fil: Stallard, Tom. University of Leicester; Reino Unido Fil: Tiscareno, Matthew S.. Cornell University; Estados Unidos Fil: Tobie, Gabriel. Centre de Recherche de Nantes; Francia Fil: Bacon, Andrew. Systems Engineering and Asssessment Ltd; Reino Unido Fil: Chaloner, Chris. Systems Engineering and Asssessment Ltd; Reino Unido Fil: Guest, Michael. Systems Engineering and Asssessment Ltd; Reino Unido Fil: Kemble, Steve. Astrium; Reino Unido Fil: Peacocke, Lisa. Astrium; Reino Unido Fil: Achilleos, Nicholas. University College London; Estados Unidos Fil: Andert, Thomas P.. Universität der Bundeswehr; Alemania Fil: Banfield, Don. Cornell University; Estados Unidos Fil: Barabash, Stas. Sweden Institute of Space Physics; Suecia Fil: Barthelemy, Matthieu. Universite Joseph Fourier; Francia Fil: Bertucci, Cesar. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina Fil: Brandt, Pontus. University Johns Hopkins; Estados Unidos Fil: Cecconi, Baptiste. Centre National de la Recherche Scientifique. Observatoire de Paris; Francia Fil: Chakrabarti, Supriya. Boston University; Estados Unidos
Published: 2012

47. Spectrophotometric properties of the nucleus of comet 67P/Churyumov-Gerasimenko from the OSIRIS instrument onboard the ROSETTA spacecraft

Author: J. Knollenberg, F. La Forgia, Olivier Groussin, Nilda Oklay, Sebastien Besse, M. Küppers, Wing-Huen Ip, Maurizio Pajola, H. U. Keller, V. Da Deppo, Carsten Güttler, Holger Sierks, Frank Scholten, Jean-Loup Bertaux, Francesco Marzari, Pedro Hasselmann, Detlef Koschny, S. F. Hviid, Ivano Bertini, Rafael Rodrigo, Harald Michalik, Nicolas Thomas, Gábor L. Kovács, M. F. A'Hearn, C. Feller, Laurent Jorda, Marco Fulle, Xian Shi, Stefano Debei, Fernando Moreno, Sonia Fornasier, Giampiero Naletto, Ekkehard Kührt, Stefano Mottola, P. J. Gutiérrez, Björn Davidsson, Luisa Lara, Cecilia Tubiana, Frank Preusker, Antoine Pommerol, M. De Cecco, R. Kramm, Gabriele Cremonese, Monica Lazzarin, Jean-Baptiste Vincent, M. A. Barucci, Hans Rickman, Colin Snodgrass, Cesare Barbieri, Klaus-Dieter Matz, C. Leyrat, J. J. Lopez Moreno, Philippe Lamy, Jessica Agarwal, Université Paris Diderot - Paris 7 ( UPD7 ), Laboratoire d'études spatiales et d'instrumentation en astrophysique ( LESIA ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Centre National de la Recherche Scientifique ( CNRS ), Observatorio Nacional [Rio de Janeiro], Research and Scientific Support Department, ESTEC ( RSSD ), European Space Research and Technology Centre ( ESTEC ), European Space Agency ( ESA ) -European Space Agency ( ESA ), Instituto de Astrofísica de Andalucía ( IAA ), Consejo Superior de Investigaciones Científicas [Spain] ( CSIC ), Max-Planck-Institut für Sonnensystemforschung ( MPS ), DLR Institute of Planetary Research, German Aerospace Center ( DLR ), Dipartimento di Fisica e Astronomia 'Galileo Galilei', Universita degli Studi di Padova = University of Padua = Université de Padoue, Laboratoire d'Astrophysique de Marseille ( LAM ), Aix Marseille Université ( AMU ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National d'Etudes Spatiales ( CNES ) -Centre National de la Recherche Scientifique ( CNRS ), International Space Science Institute ( ISSI ), Centro de Astrobiologia [Madrid] ( CAB ), Instituto Nacional de Técnica Aeroespacial ( INTA ) -Consejo Superior de Investigaciones Científicas [Spain] ( CSIC ), Space Research Centre [Warsaw] ( CBK ), Polska Akademia Nauk ( PAN ), Department of Physics and Astronomy [Uppsala], Uppsala University, Institut für Geophysik und Extraterrestrische Physik [Braunschweig] ( IGEP ), Technische Universität Braunschweig [Braunschweig], Department of Astronomy [College Park], University of Maryland [College Park], IMPEC - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales ( LATMOS ), Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Versailles Saint-Quentin-en-Yvelines ( UVSQ ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS ), Centro di Ateneo di Studi e Attività Spaziali 'Giuseppe Colombo' ( CISAS ), INAF - Osservatorio Astronomico di Padova ( OAPD ), Istituto Nazionale di Astrofisica ( INAF ), CNR Institute for Photonics and Nanotechnologies ( IFN ), Consiglio Nazionale delle Ricerche [Roma] ( CNR ), Department of Industrial Engineering [Padova], University of Trento [Trento], INAF - Osservatorio Astronomico di Trieste ( OAT ), Institute of Space Science [Taiwan], National Central University [Taiwan] ( NCU ), Operations Department (ESAC), European Space Astronomy Center ( ESAC ), Institut für Datentechnik und Kommunikationsnetze, Department of Information Engineering [Padova] ( DEI ), Physikalisches Institut [Bern], Universität Bern [Bern], School of Physical Sciences [Milton Keynes], The Open University [Milton Keynes] ( OU ), ITA, USA, GBR, FRA, DEU, Université Paris Diderot - Paris 7 (UPD7), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Research and Scientific Support Department, ESTEC (RSSD), European Space Research and Technology Centre (ESTEC), Agence Spatiale Européenne = European Space Agency (ESA)-Agence Spatiale Européenne = European Space Agency (ESA), Instituto de Astrofísica de Andalucía (IAA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research (MPS), Max-Planck-Gesellschaft, German Aerospace Center (DLR), Università degli Studi di Padova = University of Padua (Unipd), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), International Space Science Institute [Bern] (ISSI), Centro de Astrobiologia [Madrid] (CAB), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Space Research Centre of Polish Academy of Sciences (CBK), Polska Akademia Nauk = Polish Academy of Sciences (PAN), Institut für Geophysik und Extraterrestrische Physik [Braunschweig] (IGEP), Technische Universität Braunschweig = Technical University of Braunschweig [Braunschweig], University of Maryland System-University of Maryland System, PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Centro di Ateneo di Studi e Attività Spaziali 'Giuseppe Colombo' (CISAS), INAF - Osservatorio Astronomico di Padova (OAPD), Istituto Nazionale di Astrofisica (INAF), CNR Institute for Photonics and Nanotechnologies (IFN), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), INAF - Osservatorio Astronomico di Trieste (OAT), National Central University [Taiwan] (NCU), European Space Astronomy Centre (ESAC), Department of Information Engineering [Padova] (DEI), Universität Bern [Bern] (UNIBE), Faculty of Science, Technology, Engineering and Mathematics [Milton Keynes], The Open University [Milton Keynes] (OU)-The Open University [Milton Keynes] (OU), European Space Agency (ESA)-European Space Agency (ESA), Max-Planck-Institut für Sonnensystemforschung (MPS), Universita degli Studi di Padova, Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Instituto Nacional de Técnica Aeroespacial (INTA), and Consiglio Nazionale delle Ricerche [Roma] (CNR)
Subjects: 67P/Churyumov-Gerasimenko, Absolute magnitude, Opposition surge, [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Data analysis, FOS: Physical sciences, Astrophysics, Photometry, photometric, Methods: data analysis, Geometric albedo, Spectrophotometry, Comets: individual: 67P/Churyumov-Gerasimenko, Techniques: photometric, Spectral slope, Comets, medicine, Earth and Planetary Astrophysics (astro-ph.EP), Physics, Spacecraft, medicine.diagnostic_test, biology, business.industry, Astronomy and Astrophysics, biology.organism_classification, [ SDU.ASTR.EP ] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], medicine.anatomical_structure, Space and Planetary Science, Comet, Osiris, business, Nucleus, Astrophysics - Earth and Planetary Astrophysics
Abstract: The Rosetta mission of the European Space Agency has been orbiting the comet 67P/Churyumov-Gerasimenko (67P) since August 2014 and is now in its escort phase. A large complement of scientific experiments designed to complete the most detailed study of a comet ever attempted are onboard Rosetta. We present results for the photometric and spectrophotometric properties of the nucleus of 67P derived from the OSIRIS imaging system, which consists of a Wide Angle Camera (WAC) and a Narrow Angle Camera (NAC). The disk-averaged phase function of the nucleus of 67P shows a strong opposition surge with a G parameter value of -0.13$\pm$0.01 in the HG system formalism and an absolute magnitude $H_v(1,1,0)$ = 15.74$\pm$0.02 mag. The integrated spectrophotometry in 20 filters covering the 250-1000 nm wavelength range shows a red spectral behavior, without clear absorption bands except for a potential absorption centered at $\sim$ 290 nm that is possibly due to SO$_2$ ice. The nucleus shows strong phase reddening, with disk-averaged spectral slopes increasing from 11\%/(100 nm) to 16\%/(100 nm) in the 1.3$^{\circ}$--54$^{\circ}$ phase angle range. The geometric albedo of the comet is 6.5$\pm$0.2\% at 649 nm, with local variations of up to $\sim$ 16\% in the Hapi region. From the disk-resolved images we computed the spectral slope together with local spectrophotometry and identified three distinct groups of regions (blue, moderately red, and red). The Hapi region is the brightest, the bluest in term of spectral slope, and the most active surface on the comet. Local spectrophotometry shows an enhancement of the flux in the 700-750 nm that is associated with coma emissions., 18, pages, 14 figures, Astronomy and Astrophysics, in press
Published: 2015

48. Hybrid Performance Prediction Models for Fully-Connected Neural Networks on MPSoC

Author: Dariol, Quentin, Le Nours, Sebastien, Pillement, Sebastien, Stemmer, Ralf, Helms, Domenik, Grüttner, Kim, Institut d'Électronique et des Technologies du numéRique (IETR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS)-Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ), German Aerospace Center (DLR), and Charlier, Sandrine
Subjects: [SPI.OTHER]Engineering Sciences [physics]/Other, [SPI.OTHER] Engineering Sciences [physics]/Other, Model of Performance, Multi Processor, [SPI.TRON] Engineering Sciences [physics]/Electronics, Artificial Neural Networks, SystemC simulation, [SPI.TRON]Engineering Sciences [physics]/Electronics
Abstract: National audience; Predicting the performance of Artificial NeuralNetworks (ANNs) on embedded multi-core platforms is tedious.Concurrent accesses to shared resources are hard to model dueto congestion effects on the shared communication medium,which affect the performance of the application. In this paperwe present a hybrid modeling environment to enable fast yetaccurate timing prediction for fully-connected ANNs deployedon multi-core platforms. The modeling flow is based on theintegration of an analytical computation time model with acommunication time model which are both calibrated throughmeasurement inside a system level simulation using SystemC. Theproposed flow enables the prediction of the end-to-end latencyfor different mappings of several fully-connected ANNs with anaverage of more than 99 % accuracy.
Published: 2022

49. Time-Sensitive Aspects of Mars Sample Return (MSR) Science

Author: Tosca, N. J., Agee, Carl, Cockell, C., Glavin, D P, Hutzler, Aurore, Marty, B., McCubbin, F. M., Regberg, Aaron, Velbel, Michael, Kminek, G., Meyer, M., Beaty, D.W., Carrier, B. L., Haltigin, T., Hays, Lindsay, Busemann, H., Cavalazzi, Barbara, Debaille, V, Grady, M., Hauber, Ernst, Pratt, Lisa, Smith, Alvin, Smith, C., Summons, R E, Swindle, T. D., Tait, Kimberly, Udry, Arya, Usui, Tomohiro, Wadhwa, M., Westall, F., Zorzano, M.-P., Tosca N. J., Beaty D. W., Carrier B. L., Agee C. B., Cockell C. S., Glavin D. P., Hutzler A., Marty B., McCubbin F. M., Regberg A. B., Velbel M. A., Kminek G., Meyer M. A., Haltigin T., Busemann H., Cavalazzi B., Debaille V., Grady M. M., Hauber E., Hays L. E., Pratt L. M., Smith A. L., Smith C. L., Summons R. E., Swindle T. D., Tait K. T., Udry A., Usui T., Wadhwa M., Westall F., Zorzano M. -P., University of Cambridge [UK] (CAM), The University of New Mexico [Albuquerque], University of Edinburgh, NASA Goddard Space Flight Center (GSFC), European Space Agency (ESA), Centre de Recherches Pétrographiques et Géochimiques (CRPG), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), NASA Johnson Space Center (JSC), NASA, Michigan State University [East Lansing], Michigan State University System, Smithsonian Institution, NASA Headquarters, California Institute of Technology (CALTECH), Canadian Space Agency (CSA), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), University of Bologna, Université libre de Bruxelles (ULB), The Open University [Milton Keynes] (OU), German Aerospace Center (DLR), Indiana University [Bloomington], Indiana University System, The Natural History Museum [London] (NHM), University of Glasgow, Massachusetts Institute of Technology (MIT), University of Arizona, Royal Ontario Museum, University of Nevada [Las Vegas] (WGU Nevada), Japan Aerospace Exploration Agency [Sagamihara] (JAXA), Arizona State University [Tempe] (ASU), Centre de biophysique moléculaire (CBM), Université d'Orléans (UO)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), University of Aberdeen, Tosca, Nicholas [0000-0003-4415-4231], and Apollo - University of Cambridge Repository
Subjects: Minerals, geology, Extraterrestrial Environment, laboratory experiments, Sulfates, [SDV]Life Sciences [q-bio], astrobiology, Mars, Space Flight, Mars Sample Return (MSR) Science, sample return, Agricultural and Biological Sciences (miscellaneous), Space and Planetary Science, Exobiology, Clay, Gases
Abstract: Samples returned from Mars would be placed under quarantine at a Sample Receiving Facility (SRF) until they are considered safe to release to other laboratories for further study. The process of determining whether samples are safe for release, which may involve detailed analysis and/or sterilization, is expected to take several months. However, the process of breaking the sample tube seal and extracting the headspace gas will perturb local equilibrium conditions between gas and rock and set in motion irreversible processes that proceed as a function of time. Unless these time-sensitive processes are understood, planned for, and/or monitored during the quarantine period, scientific information expected from further analysis may be lost forever. At least four processes underpin the time-sensitivity of Mars returned sample science: (1) degradation of organic material of potential biological origin, (2) modification of sample headspace gas composition, (3) mineral-volatile exchange, and (4) oxidation/reduction of redox-sensitive materials. Available constraints on the timescales associated with these processes supports the conclusion that an SRF must have the capability to characterize attributes such as sample tube headspace gas composition, organic material of potential biological origin, as well as volatiles and their solid-phase hosts. Because most time-sensitive investigations are also sensitive to sterilization, these must be completed inside the SRF and on timescales of several months or less. To that end, we detail recommendations for how sample preparation and analysis could complete these investigations as efficiently as possible within an SRF. Finally, because constraints on characteristic timescales that define time-sensitivity for some processes are uncertain, future work should focus on: (1) quantifying the timescales of volatile exchange for core material physically and mineralogically similar to samples expected to be returned from Mars, and (2) identifying and developing stabilization or temporary storage strategies that mitigate volatile exchange until analysis can be completed. Executive Summary Any samples returned from Mars would be placed under quarantine at a Sample Receiving Facility (SRF) until it can be determined that they are safe to release to other laboratories for further study. The process of determining whether samples are safe for release, which may involve detailed analysis and/or sterilization, is expected to take several months. However, the process of breaking the sample tube seal and extracting the headspace gas would perturb local equilibrium conditions between gas and rock and set in motion irreversible processes that proceed as a function of time. Unless these processes are understood, planned for, and/or monitored during the quarantine period, scientific information expected from further analysis may be lost forever. Specialist members of the Mars Sample Return Planning Group Phase 2 (MSPG-2), referred to here as the Time-Sensitive Focus Group, have identified four processes that underpin the time-sensitivity of Mars returned sample science: (1) degradation of organic material of potential biological origin, (2) modification of sample headspace gas composition, (3) mineral-volatile exchange, and (4) oxidation/reduction of redox-sensitive materials (Figure 2). Consideration of the timescales and the degree to which these processes jeopardize scientific investigations of returned samples supports the conclusion that an SRF must have the capability to characterize: (1) sample tube headspace gas composition, (2) organic material of potential biological origin, (3) volatiles bound to or within minerals, and (4) minerals or other solids that host volatiles (Table 4). Most of the investigations classified as time-sensitive in this report are also sensitive to sterilization by either heat treatment and/or gamma irradiation (Velbel et al., 2022). Therefore, these investigations must be completed inside biocontainment and on timescales that minimize the irrecoverable loss of scientific information (i.e., several months or less; Section 5). To that end, the Time-Sensitive Focus Group has outlined a number of specific recommendations for sample preparation and instrumentation in order to complete these investigations as efficiently as possible within an SRF (Table 5). Constraints on the characteristic timescales that define time-sensitivity for different processes can range from relatively coarse to uncertain (Section 4). Thus, future work should focus on: (1) quantifying the timescales of volatile exchange for variably lithified core material physically and mineralogically similar to samples expected to be returned from Mars, and (2) identifying and developing stabilization strategies or temporary storage strategies that mitigate volatile exchange until analysis can be completed. List of Findings FINDING T-1: Aqueous phases, and oxidants liberated by exposure of the sample to aqueous phases, mediate and accelerate the degradation of critically important but sensitive organic compounds such as DNA. FINDING T-2: Warming samples increases reaction rates and destroys compounds making biological studies much more time-sensitive. MAJOR FINDING T-3: Given the potential for rapid degradation of biomolecules, (especially in the presence of aqueous phases and/or reactive O-containing compounds) Sample Safety Assessment Protocol (SSAP) and parallel biological analysis are time sensitive and must be carried out as soon as possible. FINDING T-4: If molecules or whole cells from either extant or extinct organisms have persisted under present-day martian conditions in the samples, then it follows that preserving sample aliquots under those same conditions (i.e., 6 mbar total pressure in a dominantly CO2 atmosphere and at an average temperature of -80°C) in a small isolation chamber is likely to allow for their continued persistence. FINDING T-5: Volatile compounds (e.g., HCN and formaldehyde) have been lost from Solar System materials stored under standard curation conditions. FINDING T-6: Reactive O-containing species have been identified in situ at the martian surface and so may be present in rock or regolith samples returned from Mars. These species rapidly degrade organic molecules and react more rapidly as temperature and humidity increase. FINDING T-7: Because the sample tubes would not be closed with perfect seals and because, after arrival on Earth, there will be a large pressure gradient across that seal such that the probability of contamination of the tube interiors by terrestrial gases increases with time, the as-received sample tubes are considered a poor choice for long-term gas sample storage. This is an important element of time sensitivity. MAJOR FINDING T-8: To determine how volatiles may have been exchanged with headspace gas during transit to Earth, the composition of martian atmosphere (in a separately sealed reservoir and/or extracted from the witness tubes), sample headspace gas composition, temperature/time history of the samples, and mineral composition (including mineral-bound volatiles) must all be quantified. When the sample tube seal is breached, mineral-bound volatile loss to the curation atmosphere jeopardizes robust determination of volatile exchange history between mineral and headspace. FINDING T-9: Previous experiments with mineral powders show that sulfate minerals are susceptible to H2O loss over timescales of hours to days. In addition to volatile loss, these processes are accompanied by mineralogical transformation. Thus, investigations targeting these minerals should be considered time-sensitive. FINDING T-10: Sulfate minerals may be stabilized by storage under fixed relative-humidity conditions, but only if the identity of the sulfate phase(s) is known a priori. In addition, other methods such as freezing may also stabilize these minerals against volatile loss. FINDING T-11: Hydrous perchlorate salts are likely to undergo phase transitions and volatile exchange with ambient surroundings in hours to days under temperature and relative humidity ranges typical of laboratory environments. However, the exact timescale over which these processes occur is likely a function of grain size, lithification, and/or cementation. FINDING T-12: Nanocrystalline or X-ray amorphous materials are typically stabilized by high proportions of surface adsorbed H2O. Because this surface adsorbed H2O is weakly bound compared to bulk materials, nanocrystalline materials are likely to undergo irreversible ripening reactions in response to volatile loss, which in turn results in decreases in specific surface area and increases in crystallinity. These reactions are expected to occur over the timescale of weeks to months under curation conditions. Therefore, the crystallinity and specific surface area of nanocrystalline materials should be characterized and monitored within a few months of opening the sample tubes. These are considered time-sensitive measurements that must be made as soon as possible. FINDING T-13: Volcanic and impact glasses, as well as opal-CT, are metastable in air and susceptible to alteration and volatile exchange with other solid phases and ambient headspace. However, available constraints indicate that these reactions are expected to proceed slowly under typical laboratory conditions (i.e., several years) and so analyses targeting these materials are not considered time sensitive. FINDING T-14: Surface adsorbed and interlayer-bound H2O in clay minerals is susceptible to exchange with ambient surroundings at timescales of hours to days, although the timescale may be modified depending on the degree of lithification or cementation. Even though structural properties of clay minerals remain unaffected during this process (with the exception of the interlayer spacing), investigations targeting H2O or other volatiles bound on or within clay minerals should be considered time sensitive upon opening the sample tube. FINDING T-15: Hydrated Mg-carbonates are susceptible to volatile loss and recrystallization and transformation over timespans of months or longer, though this timescale may be modified by the degree of lithification and cementation. Investigations targeting hydrated carbonate minerals (either the volatiles they host or their bulk mineralogical properties) should be considered time sensitive upon opening the sample tube. MAJOR FINDING T-16: Current understanding of mineral-volatile exchange rates and processes is largely derived from monomineralic experiments and systems with high surface area; lithified sedimentary rocks (accounting for some, but not all, of the samples in the cache) will behave differently in this regard and are likely to be associated with longer time constants controlled in part by grain boundary diffusion. Although insufficient information is available to quantify this at the present time, the timescale of mineral-volatile exchange in lithified samples is likely to overlap with the sample processing and curation workflow (i.e., 1-10 months; Table 4). This underscores the need to prioritize measurements targeting mineral-hosted volatiles within biocontainment. FINDING T-17: The liberation of reactive O-species through sample treatment or processing involving H2O (e.g., rinsing, solvent extraction, particle size separation in aqueous solution, or other chemical extraction or preparation protocols) is likely to result in oxidation of some component of redox-sensitive materials in a matter of hours. The presence of reactive O-species should be examined before sample processing steps that seek to preserve or target redox-sensitive minerals. Electron paramagnetic resonance spectroscopy (EPR) is one example of an effective analytical method capable of detecting and characterizing the presence of reactive O-species. FINDING T-18: Environments that maintain anoxia under inert gas containing <
Published: 2022

50. Final report of the MSR Science Planning Group 2 (MSPG2)

Author: Meyer, Michael A, Kminek, Gerhard, Beaty, David W, Carrier, Brandi Lee, Haltigin, Timothy, Hays, Lindsay E, Agee, Carl B., Busemann, Henner, Cavalazzi, Barbara, Cockell, Charles S., Debaille, Vinciane, Glavin, Daniel P., Grady, Monica M., Hauber, Ernst, Hutzler, Aurore, Marty, Bernard, McCubbin, Francis M., Pratt, Lisa M, Regberg, Aaron B., Smith, Alvin L, Smith, Caroline L, Summons, Roger E., Swindle, Timothy D, Tait, Kimberly T, Tosca, Nicholas J., Udry, Arya, Usui, Tomohiro, Velbel, Michael A., Wadhwa, Meenakshi, Westall, Frances, Zorzano, Maria-Paz, NASA Headquarters, European Space Agency (ESA), California Institute of Technology (CALTECH), Canadian Space Agency (CSA), The University of New Mexico [Albuquerque], Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), University of Bologna, University of Edinburgh, Université libre de Bruxelles (ULB), NASA Goddard Space Flight Center (GSFC), The Open University [Milton Keynes] (OU), German Aerospace Center (DLR), Centre de Recherches Pétrographiques et Géochimiques (CRPG), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Astromaterials Research and Exploration Science (ARES), NASA Johnson Space Center (JSC), NASA-NASA, Indiana University [Bloomington], Indiana University System, NASA, The Natural History Museum [London] (NHM), University of Glasgow, Massachusetts Institute of Technology (MIT), University of Arizona, Royal Ontario Museum, University of Cambridge [UK] (CAM), University of Nevada [Las Vegas] (WGU Nevada), Japan Aerospace Exploration Agency [Sagamihara] (JAXA), Michigan State University [East Lansing], Michigan State University System, Smithsonian Institution, Arizona State University [Tempe] (ASU), Centre de biophysique moléculaire (CBM), Université d'Orléans (UO)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), University of Aberdeen, Meyer M. A., Kminek G., Beaty D. W., Carrier B. L., Haltigin T., Hays L. E., Agee C. B., Busemann H., Cavalazzi B., Cockell C. S., Debaille V., Glavin D. P., Grady M. M., Hauber E., Hutzler A., Marty B., McCubbin F. M., Pratt L. M., Regberg A. B., Smith A. L., Smith C. L., Summons R. E., Swindle T. D., Tait K. T., Tosca N. J., Udry A., Usui T., Velbel M. A., Wadhwa M., Westall F., and Zorzano M. -P.
Subjects: [SDU]Sciences of the Universe [physics], Mars Sample Return (MSR) Campaign
Abstract: International audience; The Mars Sample Return (MSR) Campaign must meet a series of scientific and technical achievements to be successful. While the respective engineering responsibilities to retrieve the samples have been formalized through a Memorandum of Understanding between ESA and NASA, the roles and responsibilities of the scientific elements have yet to be fully defined. In April 2020, ESA and NASA jointly chartered the MSR Science Planning Group 2 (MSPG2) to build upon previous planning efforts in defining 1) an end-to-end MSR Science Program and 2) needed functionalities and design requirements for an MSR Sample Receiving Facility (SRF). The challenges for the first samples brought from another planet include not only maintaining and providing samples in pristine condition for study, but also maintaining biological containment until the samples meet sample safety criteria for distribution outside of biocontainment. The MSPG2 produced six reports outlining 66 findings. Abbreviated versions of the five additional high-level MSPG2 summary findings are: Summary-1. A long-term NASA/ESA MSR Science Program, along with the necessary funding and human resources, will be required to accomplish the end-to-end scientific objectives of MSR. Summary-2. MSR curation will need to be done concurrently with Biosafety Level-4 containment. This would lead to complex first-of-a-kind curation implementations and require further technology development. Summary-3. Most aspects of MSR sample science can, and should, be performed on samples deemed safe in laboratories outside of the SRF. However, other aspects of MSR sample science are both time-sensitive and sterilization-sensitive and would need to be carried out in the SRF. Summary-4. To meet the unique science, curation, and planetary protection needs of MSR, substantial analytical and sample management capabilities would be required in an SRF. Summary-5. Because of the long lead-time for SRF design, construction, and certification, it is important that preparations begin immediately, even if there is delay in the return of samples.
Published: 2022

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