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1. Calibration of the NOMAD-UVIS data

Author

Willame, Yannick, Depiesse, Cédric, Mason, Jonathon P., Thomas, Ian R., Patel, Manish R., Hathi, Brijen, Leese, Mark R., Bolsée, David, Wolff, Michael J., Trompet, Loïc, Vandaele, Ann Carine, Piccialli, Arianna, Aoki, Shohei, Ristic, Bojan, Neefs, Eddy, Beeckman, Bram, Berkenbosch, Sophie, Clairquin, Roland, Mahieux, Arnaud, Pereira, Nuno, Robert, Séverine, Viscardy, Sébastien, Wilquet, Valérie, Daerden, Frank, Lopez-Moreno, José Juan, and Bellucci, Giancarlo

Published
2022
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2. Advancing CubeSats Capabilities: Ground-Based Calibration of Uvsq-Sat NG Satellite's NIR Spectrometer and Determination of the Extraterrestrial Solar Spectrum.

Author

Meftah, Mustapha, Dufour, Christophe, Bolsée, David, Van Laeken, Lionel, Clavier, Cannelle, Chandran, Amal, Chang, Loren, Sarkissian, Alain, Galopeau, Patrick, Hauchecorne, Alain, Dahoo, Pierre-Richard, Damé, Luc, Vieau, André-Jean, Bertran, Emmanuel, Gilbert, Pierre, Ferreira, Fréderic, Engler, Jean-Luc, Montaron, Christophe, Mangin, Antoine, and Hembise Fanton d'Andon, Odile

Subjects
SPECTRAL irradiance, SPECTRAL sensitivity, SUN observations, TERRESTRIAL radiation, SPECTROGRAPHS, SOLAR spectra
Abstract

Uvsq-Sat NG is a French 6U CubeSat (10 × 20 × 30 cm) of the International Satellite Program in Research and Education (INSPIRE) designed primarily for observing greenhouse gases (GHG) such as CO2 and CH4, measuring the Earth's radiation budget (ERB), and monitoring solar spectral irradiance (SSI) at the top-of-atmosphere (TOA). It epitomizes an advancement in CubeSat technology, showcasing its enhanced capabilities for comprehensive Earth observation. Scheduled for launch in 2025, the satellite carries a compact and miniaturized near-infrared (NIR) spectrometer capable of performing observations in both nadir and solar directions within the wavelength range of 1100 to 2000 nm, with a spectral resolution of 7 nm and a 0.15° field of view. This study outlines the preflight calibration process of the Uvsq-Sat NG NIR spectrometer (UNIS), with a focus on the spectral response function and the absolute calibration of the instrument. The absolute scale of the UNIS spectrometer was accurately calibrated with a quartz-halogen lamp featuring a coiled-coil tungsten filament, certified by the National Institute of Standards and Technology (NIST) as a standard of spectral irradiance. Furthermore, this study details the ground-based measurements of direct SSI through atmospheric NIR windows conducted with the UNIS spectrometer. The measurements were obtained at the Pommier site (45.54°N, 0.83°W) in Charentes–Maritimes (France) on 9 May 2024. The objective of these measurements was to verify the absolute calibration of the UNIS spectrometer conducted in the laboratory and to provide an extraterrestrial solar spectrum using the Langley-plot technique. By extrapolating the data to AirMass Zero (AM0), we obtained high-precision results that show excellent agreement with SOLAR-HRS and TSIS-1 HSRS solar spectra. At 1.6 μm, the SSI was determined to be 238.59 ± 3.39 mW.m−2.nm−1 (k = 2). These results demonstrate the accuracy and reliability of the UNIS spectrometer for both SSI observations and GHG measurements, providing a solid foundation for future orbital data collection and analysis. [ABSTRACT FROM AUTHOR]

Published
2024
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4. Solar spectral ultraviolet irradiance variability observations during solar cycle 24 with the SOLAR/SOLSPEC instrument

Author

Damé, Luc, Meftah, Mustapha, Snow, Martin, and Bolsée, David

Abstract

Solar spectral irradiance (SSI) is the wavelength-dependent energy input to the top of the Earth’s atmosphere. Among it, the ultraviolet (UV) part of the irradiance represents the primary forcing mechanism for the photochemistry, heating, and dynamics of the Earth’s atmosphere. Both temporal and spectral variations in UV irradiance represent crucial inputs to the modelling and understanding of the behaviour of the Earth’s atmosphere. Therefore, measuring long-term UV irradiance variations over the 11-year solar activity cycle (and even over longer timescales) is fundamental. The new solar spectral irradiance dataset based on long-term solar UV irradiance observations (165-300 nm) of the SOLAR/SOLSPEC space-based instrument, provides measurements of the full-disk SSI during solar cycle 24 (from April 5, 2008 to February 10, 2017) and is used for further investigations of the long-term trend of solar activity and the construction of a homogeneous solar spectral irradiance record. A new method based on an adaptation of the Multiple Same-Irradiance-Level (MuSIL) technique was used to separate solar variability from any uncorrected instrumental trends in the UV irradiance measurements, allowing to correct degradation of the UV irradiance records to provide new solar cycle variability results during most of solar cycle 24. In particular, in the important 165-242 nm spectral region (including the Herzberg continuum), the SOLAR/SOLSPEC data agrees with the observations (SORCE/SOLSTICE) and models (SATIRE-S, NRLSSI 2) to within a 1-sigma error envelope while, between 242 and 300 nm, SOLAR/SOLSPEC agrees only with the models. New measurements are required: perspectives for new instrumentation will also be presented., The 28th IUGG General Assembly (IUGG2023) (Berlin 2023)

Published
2023

6. UV Index monitoring in Europe

Author

Schmalwieser, Alois W., Gröbner, Julian, Blumthaler, Mario, Klotz, Barbara, De Backer, Hugo, Bolsée, David, Werner, Rolf, Tomsic, Davor, Metelka, Ladislav, Eriksen, Paul, Jepsen, Nis, Aun, Margit, Heikkilä, Anu, Duprat, Thierry, Sandmann, Henner, Weiss, Tilman, Bais, Alkis, Toth, Zoltan, Siani, Anna-Maria, Vaccaro, Luisa, Diémoz, Henri, Grifoni, Daniele, Zipoli, Gaetano, Lorenzetto, Giuseppe, Petkov, Boyan H., di Sarra, Alcide Giorgio, Massen, Francis, Yousif, Charles, Aculinin, Alexandr A., den Outer, Peter, Svendby, Tove, Dahlback, Arne, Johnsen, Bjørn, Biszczuk-Jakubowska, Julita, Krzyscin, Janusz, Henriques, Diamantino, Chubarova, Natalia, Kolarž, Predrag, Mijatovic, Zoran, Groselj, Drago, Pribullova, Anna, Gonzales, Juan Ramon Moreta, Bilbao, Julia, Guerrero, José Manuel Vilaplana, Serrano, Antonio, Andersson, Sandra, Vuilleumier, Laurent, Webb, Ann, and O’Hagan, John

Published
2017
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7. Multi-instrument observations of the solar eclipse on 20 March 2015 and its effects on the ionosphere over Belgium and Europe

Author

Stankov Stanimir M., Bergeot Nicolas, Berghmans David, Bolsée David, Bruyninx Carine, Chevalier Jean-Marie, Clette Frédéric, De Backer Hugo, De Keyser Johan, D’Huys Elke, Dominique Marie, Lemaire Joseph F., Magdalenić Jasmina, Marqué Christophe, Pereira Nuno, Pierrard Viviane, Sapundjiev Danislav, Seaton Daniel B., Stegen Koen, Van der Linden Ronald, Verhulst Tobias G.W., and West Matthew J.

Subjects
Sun, Solar eclipse, Eclipse geometry, Ionosphere, Irregularities, Meteorology. Climatology, QC851-999
Abstract

A total solar eclipse occurred on 20 March 2015, with a totality path passing mostly above the North Atlantic Ocean, which resulted in a partial solar eclipse over Belgium and large parts of Europe. In anticipation of this event, a dedicated observational campaign was set up at the Belgian Solar-Terrestrial Centre of Excellence (STCE). The objective was to perform high-quality observations of the eclipse and the associated effects on the geospace environment by utilising the advanced space- and ground-based instrumentation available to the STCE in order to further our understanding of these effects, particularly on the ionosphere. The study highlights the crucial importance of taking into account the eclipse geometry when analysing the ionospheric behaviour during eclipses and interpreting the eclipse effects. A detailed review of the eclipse geometry proves that considering the actual obscuration level and solar zenith angle at ionospheric heights is much more important for the analysis than at the commonly referenced Earth’s surface or at the plasmaspheric heights. The eclipse occurred during the recovery phase of a strong geomagnetic storm which certainly had an impact on (some of) the ionospheric characteristics and perhaps caused the omission of some “low-profile” effects. However, the analysis of the ionosonde measurements, carried out at unprecedented high rates during the eclipse, suggests the occurrence of travelling ionospheric disturbances (TIDs). Also, the high temporal and spatial resolution measurements proved very important in revealing and estimating some finer details of the delay in the ionospheric reaction and the ionospheric disturbances.

Published
2017
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8. MAJIS VIS-NIR channel: performances of the focal plane unit - flight model

Author

Haffoud, Paolo, primary, Arondel, Antoine, additional, Bolsée, David, additional, Carlier, Vincent, additional, Carter, John, additional, Cisneros-González, Miriam, additional, Dubois, Jean-Pierre, additional, Dumesnil, Cydalise, additional, Filacchione, Gianrico, additional, Gonnod, Ludovic, additional, Hannou, Cyrille, additional, Hervier, Véronique, additional, Karatekin, Özgür, additional, Ketchazo, Christian, additional, Langevin, Yves, additional, Le Clec'h, Jean-Christophe, additional, Lecomte, Benoit, additional, Morinaud, Gilles, additional, Pereira, Nuno, additional, Piccioni, Giuseppe, additional, Vandaele, Ann Carine, additional, Van Laeken, Lionel, additional, Vincendon, Mathieu, additional, and Poulet, François, additional

Published
2022
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10. Calibration of the NOMAD-UVIS data

Author

Ministerio de Ciencia e Innovación (España), European Commission, Belgian Science Policy Office, Willame, Yannick, Depiesse, Cédric, Mason, Jonathon P., Thomas, Ian R., Patel, Manish R., Hathi, Brijen, Leese, Mark R., Bolsée, David, Wolff, Michael J., Trompet, Loïc, Vandaele, Ann Carine, Piccialli, Arianna, Aoki, Shohei, Ristic, Bojan, Neefs, Eddy, Beeckman, Bram, Berkenbosch, Sophie, Clairquin, Roland, Mahieux, Arnaud, Pereira, Nuno, Robert, Séverine, Viscardy, Sébastien, Wilquet, Valérie, Daerden, Frank, López-Moreno, José Juan, Bellucci, Giancarlo, Ministerio de Ciencia e Innovación (España), European Commission, Belgian Science Policy Office, Willame, Yannick, Depiesse, Cédric, Mason, Jonathon P., Thomas, Ian R., Patel, Manish R., Hathi, Brijen, Leese, Mark R., Bolsée, David, Wolff, Michael J., Trompet, Loïc, Vandaele, Ann Carine, Piccialli, Arianna, Aoki, Shohei, Ristic, Bojan, Neefs, Eddy, Beeckman, Bram, Berkenbosch, Sophie, Clairquin, Roland, Mahieux, Arnaud, Pereira, Nuno, Robert, Séverine, Viscardy, Sébastien, Wilquet, Valérie, Daerden, Frank, López-Moreno, José Juan, and Bellucci, Giancarlo

Abstract

The Ultraviolet and VIsible Spectrometer (UVIS), covering the 200–650 ​nm range, is one of three spectrometers that comprise the NOMAD instrument on the ExoMars 2016 Trace Gas Orbiter (TGO). UVIS can operate in solar occultation, nadir and limb viewing mode and was designed to monitor ozone and aerosols in the Martian atmosphere. Here, we describe the calibration procedure to convert the UVIS raw data into a calibrated data product ready for scientific exploitation. The calibration includes the CCD offset and dark current subtraction, the wavelength assignment, the noise identification and removal, the smearing removal, and the radiance or transmittance conversion. A straylight correction, critical for some parts of the UVIS spectral range, is also applied during the data reduction process, which is described in more detail in two companion papers [Mason et al., 2022; Depiesse et al., In prep] corresponding to two different and independent methods giving consistent results. The solar occultation observations are converted into transmittance and are therefore self-calibrating, while nadir and limb measurements require an absolute radiometric calibration. A comparison with coincident nadir MRO/MARCI measurements is provided as a final validation and generally shows a ±10% agreement on the radiances measured by both instruments. © 2022 The Authors. Published by Elsevier Ltd.

Published
2022

11. Publisher Correction: Martian dust storm impact on atmospheric H2O and D/H observed by ExoMars Trace Gas Orbiter

Author

Vandaele, Ann Carine, Korablev, Oleg, Daerden, Frank, Aoki, Shohei, Thomas, Ian R., Altieri, Francesca, López-Valverde, Miguel, Villanueva, Geronimo, Liuzzi, Giuliano, Smith, Michael D., Erwin, Justin T., Trompet, Loïc, Fedorova, Anna A., Montmessin, Franck, Trokhimovskiy, Alexander, Belyaev, Denis A., Ignatiev, Nikolay I., Luginin, Mikhail, Olsen, Kevin S., Baggio, Lucio, Alday, Juan, Bertaux, Jean-Loup, Betsis, Daria, Bolsée, David, Clancy, R. Todd, Cloutis, Edward, Depiesse, Cédric, Funke, Bernd, Garcia-Comas, Maia, Gérard, Jean-Claude, Giuranna, Marco, Gonzalez-Galindo, Francisco, Grigoriev, Alexey V., Ivanov, Yuriy S., Kaminski, Jacek, Karatekin, Ozgur, Lefèvre, Franck, Lewis, Stephen, López-Puertas, Manuel, Mahieux, Arnaud, Maslov, Igor, Mason, Jon, Mumma, Michael J., Neary, Lori, Neefs, Eddy, Patrakeev, Andrey, Patsaev, Dmitry, Ristic, Bojan, Robert, Séverine, Schmidt, Frédéric, Shakun, Alexey, Teanby, Nicholas A., Viscardy, Sébastien, Willame, Yannick, Whiteway, James, Wilquet, Valérie, Wolff, Michael J., Bellucci, Giancarlo, Patel, Manish R., López-Moreno, Jose-Juan, Forget, François, Wilson, Colin F., Young, Roland, Svedhem, Håkan, Vago, Jorge L., Rodionov, Daniel, NOMAD Science Team, and ACS Science Team

Published
2019
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12. Performances and calibrations of new disruptive UVC β-Ga2O3 sensors for new space applications

Author

Damé, Luc, primary, Ghorbel, Halima, additional, Meftah, Mustapha, additional, Arrateig, Xavier, additional, Gilbert, Pierre, additional, Maso, Pierre, additional, Bolsée, David, additional, Pereira, Nuno, additional, Rogers, David J., additional, Bove, Philippe, additional, Sandana, Vinod E., additional, and Teherani, Féréchteh H., additional

Published
2022
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13. INSPIRE-SAT 7, a Second CubeSat to Measure the Earth’s Energy Budget and to Probe the Ionosphere

Author

Meftah, Mustapha, primary, Boust, Fabrice, additional, Keckhut, Philippe, additional, Sarkissian, Alain, additional, Boutéraon, Thomas, additional, Bekki, Slimane, additional, Damé, Luc, additional, Galopeau, Patrick, additional, Hauchecorne, Alain, additional, Dufour, Christophe, additional, Finance, Adrien, additional, Vieau, André-Jean, additional, Bertran, Emmanuel, additional, Gilbert, Pierre, additional, Caignard, Nicolas, additional, Dias, Clément, additional, Engler, Jean-Luc, additional, Lacroix, Patrick, additional, Grossel, Kévin, additional, Rannou, Véronique, additional, Saillant, Stéphane, additional, Avelino, Yannick, additional, Azoulay, Benjamin, additional, Brand, Cyril, additional, Dominguez, Carlos, additional, Haasz, Akos, additional, Paskeviciute, Agne, additional, Segura, Kevin, additional, Maso, Pierre, additional, Ancelin, Sébastien, additional, Mercier, Christophe, additional, Stee, Valentin, additional, Mangin, Antoine, additional, Bolsée, David, additional, and Billard, Catherine, additional

Published
2022
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14. The thermal-vacuum and security system of the characterization facility for MAJIS/JUICE VIS-NIR FM and SM detectors

Author

Cisneros González, Miriam Estefania, primary, Bolsée, David, additional, Van Laeken, Lionel, additional, Pereira, Nuno, additional, Gérard, Pierre, additional, Robert, Séverine, additional, Vandaele, Ann Carine, additional, Karatekin, Özgür, additional, Poulet, François, additional, Dumesnil, Cydalise, additional, Dubois, Jean Pierre, additional, Hansotte, Jérémie, additional, Le Du, Michel, additional, and Picot, Laurent, additional

Published
2020
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15. MAJIS/JUICE VIS-NIR FM and SM detectors characterization

Author

Cisneros González, Miriam Estefania, primary, Bolsée, David, additional, Pereira, Nuno, additional, Van Laeken, Lionel, additional, Depiesse, Cédric, additional, Jacobs, Lars, additional, Robert, Séverine, additional, Vandaele, Ann Carine, additional, Gissot, Samuel, additional, Karatekin, Özgür, additional, Poulet, François, additional, Langevin, Yves, additional, Dumesnil, Cydalise, additional, Dubois, Jean Pierre, additional, Arondel, Antoine, additional, Haffoud, Paolo, additional, Ketchazo, Christian, additional, Hervier, Veronique, additional, and Crane, Bruno, additional

Published
2020
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16. Solar UV radiation measurements in Marambio, Antarctica, during years 2017–2019

Author

Aun, Margit, primary, Lakkala, Kaisa, additional, Sanchez, Ricardo, additional, Asmi, Eija, additional, Nollas, Fernando, additional, Meinander, Outi, additional, Sogacheva, Larisa, additional, De Bock, Veerle, additional, Arola, Antti, additional, de Leeuw, Gerrit, additional, Aaltonen, Veijo, additional, Bolsée, David, additional, Cizkova, Klara, additional, Mangold, Alexander, additional, Metelka, Ladislav, additional, Jakobson, Erko, additional, Svendby, Tove, additional, Gillotay, Didier, additional, and Van Opstal, Bert, additional

Published
2020
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17. Second solar ultraviolet radiometer comparison campaign UVC-II

Author

Hülsen, Gregor, primary, Gröbner, Julian, additional, Bais, Alkis, additional, Blumthaler, Mario, additional, Diémoz, Henri, additional, Bolsée, David, additional, Diaz, Ana, additional, Fountoulakis, Ilias, additional, Naranen, Erik, additional, Schreder, Josef, additional, Stefania, Facta, additional, and Manuel Vilaplana Guerrero, José, additional

Published
2020
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19. Martian dust storm impact on atmospheric H2O and D/H observed by ExoMars Trace Gas Orbiter

Author

Vandaele, Ann Carine, Korablev, Oleg, Daerden, Frank, Aoki, Shohei, Thomas, Ian R., ALTIERI, FRANCESCA, López-Valverde, Miguel, Villanueva, Geronimo, Liuzzi, Giuliano, Smith, Michael D., Erwin, Justin T., Trompet, Loïc, Fedorova, Anna A., Montmessin, Franck, Trokhimovskiy, Alexander, Belyaev, Denis A., Ignatiev, Nikolay I., Luginin, Mikhail, Olsen, Kevin S., Baggio, Lucio, Alday, Juan, Bertaux, Jean-Loup, Betsis, Daria, Bolsée, David, Clancy, R. Todd, CLOUTIS, EDWARD, Depiesse, Cédric, Funke, Bernd, Garcia-Comas, Maia, Gérard, Jean-Claude, GIURANNA, MARCO, Gonzalez-Galindo, Francisco, Grigoriev, Alexey V., Ivanov, Yuriy S., Kaminski, Jacek, Karatekin, Ozgur, Lefèvre, Franck, Lewis, Stephen, López-Puertas, Manuel, Mahieux, Arnaud, Maslov, Igor, Mason, Jon, Mumma, Michael J., Neary, Lori, Neefs, Eddy, Patrakeev, Andrey, Patsaev, Dmitry, Ristic, Bojan, Robert, Séverine, Schmidt, Frédéric, Shakun, Alexey, Teanby, Nicholas A., Viscardy, Sébastien, Willame, Yannick, Whiteway, James, Wilquet, Valérie, Wolff, Michael J., BELLUCCI, Giancarlo, Patel, Manish R., López-Moreno, Jose-Juan, Forget, François, Wilson, Colin F., Svedhem, Håkan, Vago, Jorge L., Rodionov, Daniel, NOMAD Science Team, Alonso-Rodrigo, Gustavo, Bauduin, Sophie, Carrozzo, Giacomo, Crismani, Matteo, da Pieve, Fabiana, D'AVERSA, EMILIANO, Etiope, Giuseppe, Fussen, Didier, Geminale, Anna, Gkouvelis, Leo, Holmes, James, Hubert, Benoît, Ignatiev, Nicolay I., Kasaba, Yasumasa, Kass, David, Kleinböhl, Armin, LANCIANO, ORIETTA, Nakagawa, Hiromu, Novak, Robert E., Oliva, Fabrizio, Piccialli, Arianna, Renotte, Etienne, Ritter, Birgit, Schneider, Nick, SINDONI, Giuseppe, Thiemann, Ed, Vander Auwera, Jean, Wilquet, Valerie, WOLKENBERG, PAULINA MARIA, Yelle, Roger, ACS Science Team, Anufreychik, Konstantin, Arnold, Gabriele, Duxbury, Natalia, Fouchet, Thierry, GRASSI, Davide, Guerlet, Sandrine, Hartogh, Paul, Khatuntsev, Igor, Kokonkov, Nikita, Krasnopolsky, Vladimir, Kuzmin, Ruslan, Lacombe, Gaétan, Lellouch, Emmanuel, Määttänen, Anni, Marcq, Emmanuel, Martin-Torres, Javier, Medvedev, Alexander, Millour, Ehouarn, Moshkin, Boris, Quantin-Nataf, Cathy, Rodin, Alexander, Shematovich, Valery, Thomas, Nicolas, Trokhimovsky, Alexander, Vazquez, Luis, Vincendon, Matthieu, Young, Roland, Zasova, Ludmila, Zelenyi, Lev, Zorzano, Maria Paz, Parejo, J, Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB), Space Research Institute of the Russian Academy of Sciences (IKI), Russian Academy of Sciences [Moscow] (RAS), Main Astronomical Observatory of NAS of Ukraine (MAO), National Academy of Sciences of Ukraine (NASU), European Space Research and Technology Centre (ESTEC), European Space Agency (ESA), Instituto de Astrofísica de Andalucía (IAA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Istituto di Astrofisica e Planetologia Spaziali - INAF (IAPS), Istituto Nazionale di Astrofisica (INAF), Instituto Universitario de Microgravedad 'Ignacio Da Riva' (IDR), Universidad Politécnica de Madrid (UPM), Spectroscopie de l'atmosphère, Service de Chimie Quantique et Photophysique, Université libre de Bruxelles (ULB), Space Science Institute [Boulder] (SSI), Department of Geography [Winnipeg], University of Winnipeg, NASA Goddard Space Flight Center (GSFC), Laboratoire de Physique Atmosphérique et Planétaire (LPAP), Université de Liège, School of Physical Sciences [Milton Keynes], Faculty of Science, Technology, Engineering and Mathematics [Milton Keynes], The Open University [Milton Keynes] (OU)-The Open University [Milton Keynes] (OU), Institute of Geophysics [Warsaw], Polska Akademia Nauk = Polish Academy of Sciences (PAN), Royal Observatory of Belgium [Brussels] (ROB), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Agenzia Spaziale Italiana (ASI), Graduate School of Information Sciences [Sendai], Tohoku University [Sendai], Advanced Mechanical and Optical Systems SA (AMOS), Géosciences Paris Sud (GEOPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Laboratory for Atmospheric and Space Physics [Boulder] (LASP), University of Colorado [Boulder], School of Earth Sciences [Bristol], University of Bristol [Bristol], Centre for Research in Earth and Space Science [Toronto] (CRESS), York University [Toronto], Lunar and Planetary Laboratory [Tucson] (LPL), University of Arizona, Department of Physics [Oxford], University of Oxford [Oxford], DLR Institut für Planetenforschung, Deutsches Zentrum für Luft- und Raumfahrt [Berlin] (DLR), PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), Lomonosov Moscow State University (MSU), Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), 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)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Max-Planck-Institut für Sonnensystemforschung (MPS), Max-Planck-Gesellschaft, Institute for Astrophysics and Computational Sciences [Washington], Catholic University of America, Department of Computer Science, Electrical and Space Engineering [Luleå], Luleå University of Technology (LUT), Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement [Lyon] (LGL-TPE), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École normale supérieure - Lyon (ENS Lyon), Moscow Institute of Physics and Technology [Moscow] (MIPT), Institute of Astronomy of the Russian Academy of Sciences (INASAN), University of Bern, Universidad Complutense de Madrid = Complutense University of Madrid [Madrid] (UCM), 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), Centro de Astrobiologia [Madrid] (CAB), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Instituto Nacional de Técnica Aeroespacial (INTA), Consejo Superior de Investigaciones Científicas [Spain] (CSIC), Université Libre de Bruxelles [Bruxelles] (ULB), The Open University [Milton Keynes] (OU), Polska Akademia Nauk (PAN), Royal Observatory of Belgium [Brussels], IMPEC - LATMOS, Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Paris (ENS Paris)-École normale supérieure - Paris (ENS Paris), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Universidad Complutense de Madrid [Madrid] (UCM), Consejo Superior de Investigaciones Científicas [Spain] (CSIC)-Instituto Nacional de Técnica Aeroespacial (INTA), Agence Spatiale Européenne = European Space Agency (ESA), University of Oxford, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research (MPS), 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), 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), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Ministerio de Ciencia e Innovación (España), European Space Agency, Belgian Science Policy Office, European Commission, UK Space Agency, Agenzia Spaziale Italiana, Ministerio de Ciencia, Innovación y Universidades (España), Fonds de la Recherche Scientifique (Fédération Wallonie-Bruxelles), Roscosmos, Centre National de la Recherche Scientifique (France), and Russian Government

Subjects
Martian, Ice cloud, Multidisciplinary, 010504 meteorology & atmospheric sciences, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Storm, Atmosphere of Mars, Atmospheric sciences, 01 natural sciences, Trace gas, chemistry.chemical_compound, chemistry, 13. Climate action, Dust storm, 0103 physical sciences, Environmental science, Semiheavy water, 010303 astronomy & astrophysics, Water vapor, 0105 earth and related environmental sciences, Sciences exactes et naturelles
Abstract

A publisher correction to this article was published on 17 April 2019, Global dust storms on Mars are rare1,2 but can affect the Martian atmosphere for several months. They can cause changes in atmospheric dynamics and inflation of the atmosphere3, primarily owing to solar heating of the dust3. In turn, changes in atmospheric dynamics can affect the distribution of atmospheric water vapour, with potential implications for the atmospheric photochemistry and climate on Mars4. Recent observations of the water vapour abundance in the Martian atmosphere during dust storm conditions revealed a high-altitude increase in atmospheric water vapour that was more pronounced at high northern latitudes5,6, as well as a decrease in the water column at low latitudes7,8. Here we present concurrent, high-resolution measurements of dust, water and semiheavy water (HDO) at the onset of a global dust storm, obtained by the NOMAD and ACS instruments onboard the ExoMars Trace Gas Orbiter. We report the vertical distribution of the HDO/H2O ratio (D/H) from the planetary boundary layer up to an altitude of 80 kilometres. Our findings suggest that before the onset of the dust storm, HDO abundances were reduced to levels below detectability at altitudes above 40 kilometres. This decrease in HDO coincided with the presence of water-ice clouds. During the storm, an increase in the abundance of H2O and HDO was observed at altitudes between 40 and 80 kilometres. We propose that these increased abundances may be the result of warmer temperatures during the dust storm causing stronger atmospheric circulation and preventing ice cloud formation, which may confine water vapour to lower altitudes through gravitational fall and subsequent sublimation of ice crystals3. The observed changes in H2O and HDO abundance occurred within a few days during the development of the dust storm, suggesting a fast impact of dust storms on the Martian atmosphere. © 2019, The Author(s), under exclusive licence to Springer Nature Limited., This project acknowledges funding by the Belgian Science Policy Office (BELSPO), with financial and contractual coordination by the ESA Prodex Office (PEA 4000103401, 4000121493); by the Spanish MICINN through its Plan Nacional and by European funds under grants ESP2015-65064-C2-1-P and ESP2017-87143-R (MINECO/FEDER); by the UK Space Agency through grants ST/R005761/1, ST/P001262/1, ST/R001405/1, ST/S00145X/1, ST/R001367/1, ST/P001572/1 and ST/R001502/1; and the Italian Space Agency through grant 2018-2-HH.0. The IAA/CSIC team acknowledges financial support from the State Agency for Research of the Spanish MCIU through the 'Center of Excellence Severo Ochoa' award for the Instituto de Astrofisica de Andalucia (SEV-2017-0709). This work was supported by the Belgian Fonds de la Recherche Scientifique - FNRS under grant number 30442502 (ET_HOME). The ACS experiment is led by IKI, Space Research Institute in Moscow, assisted by LATMOS in France. The project acknowledges funding by Roscosmos and CNES. The science operations of ACS are funded by Roscosmos and ESA. IKI affiliates acknowledge funding under grant number 14.W03.31.0017 and contract number 0120.0 602993 (0028-2014-0004) of the Russian government.

Published
2019

20. No detection of methane on Mars from early ExoMars Trace Gas Orbiter observations

Author

Korablev, Oleg, Avandaele, Ann Carine, Montmessin, Franck, Fedorova, Anna A., Trokhimovskiy, Alexander, Forget, François, Lefèvre, Franck, Daerden, Frank, Thomas, Ian R., Trompet, Loïc, Erwin, Justin T., Kasaba, Yasumasa, Kass, David, Khatuntsev, Igor, Kleinböhl, Armin, Kokonkov, Nikita, Krasnopolsky, Vladimir, Kuzmin, Ruslan, Lacombe, Gaétan, LANCIANO, ORIETTA, Lellouch, Emmanuel, Oliva, Fabrizio, Lewis, Stephen, Luginin, Mikhail, Liuzzi, Giuliano, López-Puertas, Manuel, López-Valverde, Miguel, Määttänen, Anni, Mahieux, Arnaud, Marcq, Emmanuel, Martin-Torres, Javier, Maslov, Igor, Patsaev, Dmitry, Medvedev, Alexander, Millour, Ehouarn, Moshkin, Boris, Mumma, Michael J., Nakagawa, Hiromu, Novak, Robert E., Piccialli, Arianna, Quantin-Nataf, Cathy, Renotte, Etienne, Ritter, Birgit, Rodin, Alexander, Schmidt, Frédéric, Schneider, Nick, Shematovich, Valery, Aoki, Shohei, Smith, Michael D., Teanby, Nicholas A., Thiemann, Ed, Thomas, Nicolas, Vander Auwera, Jean, Vazquez, Luis, Villanueva, Geronimo, Vincendon, Matthieu, Whiteway, James, Wilquet, Valérie, Robert, Séverine, Wolff, Michael J., WOLKENBERG, PAULINA MARIA, Yelle, Roger, Young, Roland, Zasova, Ludmila, Zorzano, Maria Paz, Neary, Lori, Viscardy, Sébastien, Grigoriev, Alexey V., Ignatiev, Nikolay I., Shakun, Alexey, Patrakeev, Andrey, Belyaev, Denis A., Bertaux, Jean-Loup, Olsen, Kevin S., Baggio, Lucio, Alday, Juan, Ivanov, Yuriy S., Ristic, Bojan, Mason, Jon, Willame, Yannick, Depiesse, Cédric, Hetey, Laszlo, Berkenbosch, Sophie, Clairquin, Roland, Queirolo, Claudio, Beeckman, Bram, Neefs, Eddy, Patel, Manish R., BELLUCCI, Giancarlo, López-Moreno, Jose-Juan, Wilson, Colin F., Etiope, Giuseppe, Zelenyi, Lev, Svedhem, Håkan, Vago, Jorge L., ACS Science Team, NOMAD Science Team, Alonso-Rodrigo, Gustavo, ALTIERI, FRANCESCA, Anufreychik, Konstantin, Arnold, Gabriele, Bauduin, Sophie, Bolsée, David, CARROZZO, FILIPPO GIACOMO, Clancy, R. Todd, CLOUTIS, EDWARD, Crismani, Matteo, da Pieve, Fabiana, D'AVERSA, EMILIANO, Duxbury, Natalia, Encrenaz, Therese, Fouchet, Thierry, Funke, Bernd, Fussen, Didier, Garcia-Comas, Maia, Gérard, Jean-Claude, GIURANNA, MARCO, Gkouvelis, Leo, Gonzalez-Galindo, Francisco, GRASSI, Davide, Guerlet, Sandrine, Hartogh, Paul, Holmes, James, Hubert, Benoît, Kaminski, Jacek, Karatekin, Ozgur, Space Research Institute of the Russian Academy of Sciences (IKI), Russian Academy of Sciences [Moscow] (RAS), Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB), PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Department of Physics [Oxford], University of Oxford [Oxford], Main Astronomical Observatory of NAS of Ukraine (MAO), National Academy of Sciences of Ukraine (NASU), School of Physical Sciences [Milton Keynes], Faculty of Science, Technology, Engineering and Mathematics [Milton Keynes], The Open University [Milton Keynes] (OU)-The Open University [Milton Keynes] (OU), Istituto di Astrofisica e Planetologia Spaziali - INAF (IAPS), Istituto Nazionale di Astrofisica (INAF), Instituto de Astrofísica de Andalucía (IAA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Roma (INGV), Istituto Nazionale di Geofisica e Vulcanologia, Faculty of Environmental Science and Engineering [Cluj-Napoca], Babes-Bolyai University [Cluj-Napoca] (UBB), European Space Research and Technology Centre (ESTEC), European Space Agency (ESA), Instituto Universitario de Microgravedad 'Ignacio Da Riva' (IDR), Universidad Politécnica de Madrid (UPM), DLR Institut für Planetenforschung, Deutsches Zentrum für Luft- und Raumfahrt [Berlin] (DLR), Spectroscopie de l'atmosphère, Service de Chimie Quantique et Photophysique, Université libre de Bruxelles (ULB), Space Science Institute [Boulder] (SSI), Department of Geography [Winnipeg], University of Winnipeg, NASA Goddard Space Flight Center (GSFC), Lomonosov Moscow State University (MSU), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), 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)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Atmosphérique et Planétaire (LPAP), Université de Liège, Max-Planck-Institut für Sonnensystemforschung (MPS), Max-Planck-Gesellschaft, Institute of Geophysics [Warsaw], Polska Akademia Nauk = Polish Academy of Sciences (PAN), Royal Observatory of Belgium [Brussels] (ROB), Graduate School of Information Sciences [Sendai], Tohoku University [Sendai], Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Institute for Astrophysics and Computational Sciences [Washington], Catholic University of America, Agenzia Spaziale Italiana (ASI), Department of Computer Science, Electrical and Space Engineering [Luleå], Luleå University of Technology (LUT), Laboratoire de Géologie de Lyon - Terre, Planètes, Environnement [Lyon] (LGL-TPE), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École normale supérieure - Lyon (ENS Lyon), Advanced Mechanical and Optical Systems SA (AMOS), Moscow Institute of Physics and Technology [Moscow] (MIPT), Géosciences Paris Sud (GEOPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Laboratory for Atmospheric and Space Physics [Boulder] (LASP), University of Colorado [Boulder], Institute of Astronomy of the Russian Academy of Sciences (INASAN), School of Earth Sciences [Bristol], University of Bristol [Bristol], University of Bern, Universidad Complutense de Madrid = Complutense University of Madrid [Madrid] (UCM), 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), Centre for Research in Earth and Space Science [Toronto] (CRESS), York University [Toronto], Lunar and Planetary Laboratory [Tucson] (LPL), University of Arizona, Belgian Science Policy Office, Ministerio de Ciencia e Innovación (España), European Commission, UK Space Agency, Centre National de la Recherche Scientifique (France), Fonds de la Recherche Scientifique (Fédération Wallonie-Bruxelles), Roscosmos, Russian Government, Agenzia Spaziale Italiana, European Space Agency, IMPEC - LATMOS, Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Paris (ENS Paris)-École normale supérieure - Paris (ENS Paris), The Open University [Milton Keynes] (OU), Consejo Superior de Investigaciones Científicas [Spain] (CSIC), Université Libre de Bruxelles [Bruxelles] (ULB), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Polska Akademia Nauk (PAN), Royal Observatory of Belgium [Brussels], Universidad Complutense de Madrid [Madrid] (UCM), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), University of Oxford, Agence Spatiale Européenne = European Space Agency (ESA), Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research (MPS), 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 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)

Subjects
Martian, Multidisciplinary, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], 010504 meteorology & atmospheric sciences, Chemistry, Atmosphere of Mars, Mars Exploration Program, 01 natural sciences, 7. Clean energy, Methane, Trace gas, law.invention, Astrobiology, Atmosphere, Orbiter, chemistry.chemical_compound, 13. Climate action, law, Atmospheric chemistry, 0103 physical sciences, 010303 astronomy & astrophysics, Sciences exactes et naturelles, 0105 earth and related environmental sciences
Abstract

A publisher correction to this article was published on 17 April 2019, The detection of methane on Mars has been interpreted as indicating that geochemical or biotic activities could persist on Mars today1. A number of different measurements of methane show evidence of transient, locally elevated methane concentrations and seasonal variations in background methane concentrations2–5. These measurements, however, are difficult to reconcile with our current understanding of the chemistry and physics of the Martian atmosphere6,7, which—given methane’s lifetime of several centuries—predicts an even, well mixed distribution of methane1,6,8. Here we report highly sensitive measurements of the atmosphere of Mars in an attempt to detect methane, using the ACS and NOMAD instruments onboard the ESA-Roscosmos ExoMars Trace Gas Orbiter from April to August 2018. We did not detect any methane over a range of latitudes in both hemispheres, obtaining an upper limit for methane of about 0.05 parts per billion by volume, which is 10 to 100 times lower than previously reported positive detections2,4. We suggest that reconciliation between the present findings and the background methane concentrations found in the Gale crater4 would require an unknown process that can rapidly remove or sequester methane from the lower atmosphere before it spreads globally. © 2019, The Author(s), under exclusive licence to Springer Nature Limited., ExoMars is the space mission of ESA and Roscosmos. The ACS experiment is led by IKI, the Space Research Institute in Moscow, assisted by LATMOS in France. The project acknowledges funding by Roscosmos and CNES. The science operations of ACS are funded by Roscosmos and ESA. IKI affiliates acknowledge funding under grant number 14.W03.31.0017 and contract number 0120.0 602993 (0028-2014-0004) of the Russian government. The NOMAD experiment is led by the Royal Belgian Institute for Space Aeronomy (BIRA-IASB), assisted by co-PI teams from Spain (IAA-CSIC), Italy (INAF-IAPS), and the UK (Open University). This project acknowledges funding by the Belgian Science Policy Office (BELSPO), with the financial and contractual coordination of the ESA Prodex Office (PEA 4000103401 and PEA 4000121493), by Spanish MICINN through its Plan Nacional and by European funds under grants ESP2015-65064-C2-1-P and ESP2017-87143-R (MINECO/FEDER), as well as by the UK Space Agency through grants ST/R005761/1, ST/P001262/1, ST/R001405/1, ST/S00145X/1, ST/R001367/1, ST/P001572/1 and ST/R001502/1, and the Italian Space Agency through grant 2018-2-HH.0. This work was supported by the Belgian Fonds de la Recherche Scientifique-FNRS under grant number 30442502 (ET_HOME).

Published
2019

21. Methane on Mars: New insights into the sensitivity of CH4 with the NOMAD/ExoMars spectrometer through its first in flight calibration

Author

Liuzzi, Giuliano, Villanueva, Geronimo L., Mumma, Michael J., Smith, Michael D., Daerden, Frank, Ristic, Bojan, Thomas, Ian R., Vandaele, Ann Carine, Patel, Manish R., Lopez-Moreno, José-Juan, Bellucci, Giancarlo, Allen, M., Alonso-Rodrigo, G., Altieri, Francesca, Aoki, Shohei, Bauduin, Sophie, Bolsée, David, Clancy, Todd, Cloutis, Edward, D'Aversa, Emiliano, Depiesse, Cédric, Erwin, Justin T., Fedorova, Anna A., Formisano, V., Funke, Bernd, Fussen, Didier, Garcia-Comas, Maia, Geminale, A., Gérard, Jean-Claude, Gillotay, Didier, Giuranna, Marco, Gonzalez-Galindo, Francisco, Hewson, Will, Holmes, James, Ignatiev, Nikolay I., Kaminski, Jacek, Karatekin, Ozgur, Kasaba, Y., Lanciano, Orietta, Lefèvre, Franck, Lewis, Stephen S.P., López-Puertas, Manuel, López-Valverde, Miguel, Mahieux, Arnaud, Mason, Jon, Mc Connell, Jack, Nakagawa, Hiromu, Neary, Lori, Neefs, Eddy, Novak, Robert E., Oliva, Fabrizio, Piccialli, A., Renotte, E., Robert, Séverine, Sindoni, G., Stiepen, A., Trokhimovskiy, Alexander, Vander Auwera, Jean, Viscardy, Sébastien, Whiteway, James J.A., Willame, Yannick, Wilquet, Valérie, Wolff, Michael J., Wolkenberg, Paulina, Aparicio del Moral, Beatriz, Barzin, Pascal, Beeckman, Bram, BenMoussa, Ali, Berkenbosch, Sophie, Biondi, David, Bonnewijn, S., Candini, Gian Paolo, Clairquin, Roland, Cubas, Javier, Giordanengo, Boris, Gissot, Samuel, Gomez, Alejandro, Hathi, Brijen, Jeronimo, Zafra, Leese, M., Maes, Jeroen, Mazy, Emmanuel, Mazzoli, Alexandra, Meseguer, José., Morales, Rafael, Orban, Anne, Pastor-Morales, M., Perez-grande, Isabel, Queirolo, Claudio, Gómez-Rodriguez, Julio, Saggin, Bortolino, Samain, Valérie, Sanz Andres, Angel, Sanz, Rosario, Simar, Juan-Felipe, Thibert, Tanguy, Liuzzi, Giuliano, Villanueva, Geronimo L., Mumma, Michael J., Smith, Michael D., Daerden, Frank, Ristic, Bojan, Thomas, Ian R., Vandaele, Ann Carine, Patel, Manish R., Lopez-Moreno, José-Juan, Bellucci, Giancarlo, Allen, M., Alonso-Rodrigo, G., Altieri, Francesca, Aoki, Shohei, Bauduin, Sophie, Bolsée, David, Clancy, Todd, Cloutis, Edward, D'Aversa, Emiliano, Depiesse, Cédric, Erwin, Justin T., Fedorova, Anna A., Formisano, V., Funke, Bernd, Fussen, Didier, Garcia-Comas, Maia, Geminale, A., Gérard, Jean-Claude, Gillotay, Didier, Giuranna, Marco, Gonzalez-Galindo, Francisco, Hewson, Will, Holmes, James, Ignatiev, Nikolay I., Kaminski, Jacek, Karatekin, Ozgur, Kasaba, Y., Lanciano, Orietta, Lefèvre, Franck, Lewis, Stephen S.P., López-Puertas, Manuel, López-Valverde, Miguel, Mahieux, Arnaud, Mason, Jon, Mc Connell, Jack, Nakagawa, Hiromu, Neary, Lori, Neefs, Eddy, Novak, Robert E., Oliva, Fabrizio, Piccialli, A., Renotte, E., Robert, Séverine, Sindoni, G., Stiepen, A., Trokhimovskiy, Alexander, Vander Auwera, Jean, Viscardy, Sébastien, Whiteway, James J.A., Willame, Yannick, Wilquet, Valérie, Wolff, Michael J., Wolkenberg, Paulina, Aparicio del Moral, Beatriz, Barzin, Pascal, Beeckman, Bram, BenMoussa, Ali, Berkenbosch, Sophie, Biondi, David, Bonnewijn, S., Candini, Gian Paolo, Clairquin, Roland, Cubas, Javier, Giordanengo, Boris, Gissot, Samuel, Gomez, Alejandro, Hathi, Brijen, Jeronimo, Zafra, Leese, M., Maes, Jeroen, Mazy, Emmanuel, Mazzoli, Alexandra, Meseguer, José., Morales, Rafael, Orban, Anne, Pastor-Morales, M., Perez-grande, Isabel, Queirolo, Claudio, Gómez-Rodriguez, Julio, Saggin, Bortolino, Samain, Valérie, Sanz Andres, Angel, Sanz, Rosario, Simar, Juan-Felipe, and Thibert, Tanguy

Abstract

info:eu-repo/semantics/published

Published
2019

24. NOMAD spectometer on the ExoMArs trace gas orbiter misión : part 2 - design, manufacturing, and testing of the ultraviolet and visible channel

Author

Patel, Manish R., Antoine, Philippe, Mason, Jonathan, Leese, Mark, Hathi, Brijen, Stevens, Adams, Dawson, Daniel, Gow, Jason, Ringrose, Timothy, Holmes, E., Lewis, Sthepen R., Beghuin, Didier, Donink, Philip van, Ligot, Renaud, Dewandel, Jean-Luc, Hu, Daohua, Bates, Doug, Cole, Richard, Drummond, Rachel, Thomas, Ian R., Depiesse, Cédric, Neefs, Eddy, Equeter, Eddy, Ristic, Bojan, Berkenboch, Sophie, Bolsée, David, Willame, Yannick, Vandele, Anne Carine, Lesschave, Stefan, Vos, Lieve de, Vooren, Nico van, Thibert, Tanguy, Mazzy, Emmanuel, Rodríguez-Gómez, Julio, Morales, Rafael, Candini, Gian Paolo, Pastor-Morales, M. Carmen, Sanz, Rosario, Aparicio del Moral, Beatriz, Jeronimo-Zafra, José María, Gómez López, Juan Manuel, Alonso Rodrigo, Gustavo, Pérez Grande, María Isabel, Cubas Cano, Javier, Gómez San Juan, Alejandro Manuel, Navarro Medina, Fermín, BenMoussa, Ali, Giordanengo, Boris, Gissot, Samuel, Bellucci, Giancarlo, and López Moreno, José Juan

Subjects
Aeronáutica
Abstract

NOMAD is a spectrometer suite on board the ESA/Roscosmos ExoMars Trace Gas Orbiter, which launched in March 2016. NOMAD consists of two infrared channels and one ultraviolet and visible channel, allowing the instrument to perform observations quasi-constantly, by taking nadir measurements at the day- and night-side, and during solar occultations. Here, in part 2 of a linked study, we describe the design, manufacturing, and testing of the ultraviolet and visible spectrometer channel called UVIS. We focus upon the optical design and working principle where two telescopes are coupled to a single grating spectrometer using a selector mechanism.

Published
2017

25. A new solar reference spectrum from 165 to 3088 nm

Author

Damé, Luc, Meftah, Mustapha, Bolsée, David, Pereira, Nuno, Bekki, Slimane, Hauchecorne, Alain, Irbah, Abdanour, Cessateur, Gaël, Sluse, Dominique, Cardon, Catherine, HELIOS - 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), STRATO - LATMOS, and Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB)

Subjects
[SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], [SDU.ASTR.SR] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR]
Abstract

International audience; Since April 5, 2008 and until February 15, 2017 the SOLAR/SOLSPEC spectro-radiometer on the International Space Station performed accurate measurements of Solar Spectral Irradiance (SSI) from the far ultraviolet to the infrared (165 nm to 3088 nm). These measurements are of primary importance for a better understanding of solar physics and of the impact of solar variability on climate (via Earth's atmospheric photochemistry). In particular, a new reference solar spectrum is established covering most of the unusual solar cycle 24 from minimum in 2008 to maximum. Temporal variability in the UV (165 to 400 nm) is presented in several wavelengths bands. These results are possible thanks to revised engineering corrections, improved calibrations and new procedures to account for thermal and aging advanced corrections. Uncertainties on these measurements are evaluated and compare favorably with other instruments.

Published
2017

28. Multi-instrument observations of the solar eclipse on 20 March 2015 and its effects on the ionosphere over Belgium and Europe

Author

UCL - SST/ELI/ELIC - Earth & Climate, Stankov, Stanimir, Bergeot, Nicolas, Berghmans, David, Bolsée, David, Pierrard, Viviane, UCL - SST/ELI/ELIC - Earth & Climate, Stankov, Stanimir, Bergeot, Nicolas, Berghmans, David, Bolsée, David, and Pierrard, Viviane

Abstract

A total solar eclipse occurred on 20 March 2015, with a totality path passing mostly above the North Atlantic Ocean, which resulted in a partial solar eclipse over Belgium and large parts of Europe. In anticipation of this event, a dedicated observational campaign was set up at the Belgian Solar-Terrestrial Centre of Excellence (STCE). The objective was to perform high-quality observations of the eclipse and the associated effects on the geospace environment by utilising the advanced space- and ground-based instrumentation available to the STCE in order to further our understanding of these effects, particularly on the ionosphere. The study highlights the crucial importance of taking into account the eclipse geometry when analysing the ionospheric behaviour during eclipses and interpreting the eclipse effects. A detailed review of the eclipse geometry proves that considering the actual obscuration level and solar zenith angle at ionospheric heights is much more important for the analysis than at the commonly referenced Earth’s surface or at the plasmaspheric heights. The eclipse occurred during the recovery phase of a strong geomagnetic storm which certainly had an impact on (some of) the ionospheric characteristics and perhaps caused the omission of some ‘‘low-profile’’ effects. However, the analysis of the ionosonde measurements, carried out at unprecedented high rates during the eclipse, suggests the occurrence of travelling ionospheric disturbances (TIDs). Also, the high temporal and spatial resolution measurements proved very important in revealing and estimating some finer details of the delay in the ionospheric reaction and the ionospheric disturbances.

Published
2017

29. Optical and radiometric models of the NOMAD instrument part II: The infrared channels - SO and LNO

Author

Thomas, I. R., Vandaele, A. C., Robert, S., Neefs, E., Drummond, R., Daerden, F., Delanoye, S., Ristic, B., Berkenbosch, S., Clairquin, R., Maes, J., Bonnewijn, S., Depiesse, C., Mahieux, A., Trompet, L., Neary, L., Willame, Y., Wilquet, V., Nevejans, D., Aballea, L., Moelans, W., De Vos, L., Lesschaeve, S., Van Vooren, N., Lopez Moreno, J. J., Patel, M. R., Bellucci, G., Vandaele, Ann Carine, Moreno, Lopez, Juan, Jose, Bellucci, Giancarlo, Patel, Manish, Allen, Mark, Altieri, Francesca, Aoki, Shohei, Bolsée, David, Clancy, Todd, Cloutis, Edward, Daerden, Frank, Depiesse, Cédric, Fedorova, Anna, Formisano, Vittorio, Funke, Bernd, Fussen, Didier, Garcia Comas, Maya, Geminale, Anna, Gérard, Jean Claude, Gillotay, Didier, Giuranna, Marco, Gonzalez Galindo, Francisco, Ignatiev, Nicolai, Kaminski, Jacek, Karatekin, Ozgur, Kasaba, Yasumasa, Lefèvre, Franck, Lewis, Stephen, López Puertas, Manuel, López Valverde, Miguel, Mahieux, Arnaud, Mason, Jon, Mcconnell, Jack, Mumma, Mike, Neary, Lori, Neefs, Eddy, Novak, Robert, Renotte, Etienne, Robert, Séverine, Sindoni, Giuseppe, Smith, Mike, Thomas, Ian R., Trokhimovsky, Sacha, Vander Auwera, Jean, Villanueva, Geronimo, Whiteway, Jim, Willame, Yannick, Wilquet, Valerie, Wolff, Mike, Alonso Rodrigo, Gustavo, Aparicio Del Moral, Beatriz, Barzin, Pascal, Benmoussa, Ali, Berkenbosch, Sophie, Biondi, David, Bonnewijn, Sabrina, Candini, Gian Paolo, Clairquin, Roland, Cubas, Javier, Delanoye, Sofie, Giordanengo, Boris, Gissot, Samuel, Gomez, Alejandro, Zafra, Jose Jeronimo, Leese, Mark, Maes, Jeroen, Mazy, Emmanuel, Mazzoli, Alexandra, Meseguer, Jose, Morales, Rafael, Orban, Anne, Del Carmen Pastor Morales, Maria, Perez Grande, Isabel, Ristic, Bojan, Rodriguez Gomez, Julio, Saggin, Bortolino, Samain, Valérie, Sanz Andres, Angel, Sanz, Rosario, Simar, Juan Felipe, Thibert, Tanguy, Belgian Science Policy Office, European Space Agency, and UK Space Agency

Subjects
Physics, Martian, 010504 meteorology & atmospheric sciences, Spectrometer, Atmospheric composition, Spectrometers and spectroscopic instrumentation, 01 natural sciences, Occultation, Atomic and Molecular Physics, and Optics, Trace gas, law.invention, Remote sensing and sensors, Orbiter, Space instrumentation, Atmosphere of Earth, law, Atomic and Molecular Physics, Martian surface, 0103 physical sciences, Nadir, Radiative transfer, and Optics, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, Remote sensing
Abstract

NOMAD is a suite of three spectrometers that will be launched in 2016 as part of the joint ESA-Roscosmos ExoMars Trace Gas Orbiter mission. The instrument contains three channels that cover the IR and UV spectral ranges and can perform solar occultation, nadir and limb observations, to detect and map a wide variety of Martian atmospheric gases and trace species. Part I of this work described the models of the UVIS channel; in this second part, we present the optical models representing the two IR channels, SO (Solar Occultation) and LNO (Limb, Nadir and Occultation), and use them to determine signal to noise ratios (SNRs) for many expected observational cases. In solar occultation mode, both the SO and LNO channel exhibit very high SNRs >5000. SNRs of around 100 were found for the LNO channel in nadir mode, depending on the atmospheric conditions, Martian surface properties, and observation geometry., NOMAD has been made possible thanks to funding by the Belgian Science Policy Office (BELSPO) and financial and contractual coordination by the ESA Prodex Office. The research was performed as part of the “Interuniversity Attraction Poles” programme financed by the Belgian government (Planet TOPERS). UK funding is acknowledged under the UK Space Agency grant ST/I003061/1.

Published
2016

30. MAJIS/JUICE VIS-NIR FM and SM detectors characterization

Author

Lystrup, Makenzie, Perrin, Marshall D., Cisneros-González, Miriam E., Bolsée, David, Pereira, Nuno, Van Laeken, Lionel, Depiesse, Cédric, Jacobs, Lars, Robert, Séverine, Vandaele, Ann C., Gissot, Samuel, Karatekin, Özgür, Poulet, François, Langevin, Yves, Dumesnil, Cydalise, Dubois, Jean Pierre, Arondel, Antoine, Haffoud, Paolo, Ketchazo, Christian, Hervier, Veronique, and Crane, Bruno

Published
2020
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32. Characterization facility for the MAJIS/JUICE VIS-NIR FM and SM detectors

Author

Lystrup, Makenzie, Perrin, Marshall D., Bolsée, David, Van Laeken, Lionel, Cisneros-González, Miriam E., Pereira, Nuno, Depiesse, Cédric, Jacobs, Lars, Vandaele, Ann C., Ritter, Birgit, Gissot, Samuel, Karatekin, Özgür, Poulet, François, Langevin, Yves, Dumesnil, Cydalise, Dubois, Jean Pierre, Arondel, Antoine, Haffoud, Paolo, Ketchazo, Christian, and Hervier, Véronique

Published
2020
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33. NOMAD spectrometer on the ExoMars trace gas orbiter mission: part 2—design, manufacturing, and testing of the ultraviolet and visible channel

Author

Patel, Manish R., primary, Antoine, Philippe, additional, Mason, Jonathon, additional, Leese, Mark, additional, Hathi, Brijen, additional, Stevens, Adam H., additional, Dawson, Daniel, additional, Gow, Jason, additional, Ringrose, Timothy, additional, Holmes, James, additional, Lewis, Stephen R., additional, Beghuin, Didier, additional, van Donink, Philip, additional, Ligot, Renaud, additional, Dewandel, Jean-Luc, additional, Hu, Daohua, additional, Bates, Doug, additional, Cole, Richard, additional, Drummond, Rachel, additional, Thomas, Ian R., additional, Depiesse, Cédric, additional, Neefs, Eddy, additional, Equeter, Eddy, additional, Ristic, Bojan, additional, Berkenbosch, Sophie, additional, Bolsée, David, additional, Willame, Yannick, additional, Vandaele, Ann Carine, additional, Lesschaeve, Stefan, additional, De Vos, Lieve, additional, Van Vooren, Nico, additional, Thibert, Tanguy, additional, Mazy, Emmanuel, additional, Rodriguez-Gomez, Julio, additional, Morales, Rafael, additional, Candini, Gian Paolo, additional, Pastor-Morales, M. Carmen, additional, Sanz, Rosario, additional, Aparicio del Moral, Beatriz, additional, Jeronimo-Zafra, José-Maria, additional, Gómez-López, Juan Manuel, additional, Alonso-Rodrigo, Gustavo, additional, Pérez-Grande, Isabel, additional, Cubas, Javier, additional, Gomez-Sanjuan, Alejandro M., additional, Navarro-Medina, Fermín, additional, BenMoussa, Ali, additional, Giordanengo, Boris, additional, Gissot, Samuel, additional, Bellucci, Giancarlo, additional, and Lopez-Moreno, Jose Juan, additional

Published
2017
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34. Optical and radiometric models of the NOMAD instrument part I: the UVIS channel

Author

Vandaele, Ann C., Willame, Yannick, Depiesse, Cédric, Thomas, Ian R., Robert, Séverine, Bolsée, David, Patel, Manish R., Mason, Jon P., Leese, Mark, Lesschaeve, Stefan, Antoine, Philippe, Daerden, Frank, Delanoye, Sofie, Drummond, Rachel, Neefs, Eddy, Ristic, Bojan, Lopez Moreno, José Juan, Bellucci, Giancarlo, Allen, M., Altieri, F., Aoki, S., Clancy, T., Cloutis, E., Fedorova, A., Formisano, V., Funke, B., Fussen, D., Garcia Comas, M., Geminale, A., Gérard, J. C., Gillotay, D., Giuranna, M., Gonzalez Galindo, F., Ignatiev, N., Kaminski, J., Karatekin, O., Kasaba, Y., Lefèvre, F., Lewis, S., López Puertas, M., López Valverde, M., Mahieux, A., Mumma, M., Neary, L., Novak, R., Renotte, E., Sindoni, G., Smith, M., Trokhimovskiy, A., Vander Auwera, J., Villanueva, G., Viscardy, S., Whiteway, J., Wilquet, V., Wolff, M., Alonso Rodrigo, G., Aparicio Del Moral, B., Barzin, P., Benmoussa, A., Berkenbosch, S., Biondi, D., Bonnewijn, S., Candini, G., Clairquin, R., Cubas, J., Giordanengo, B., Gissot, S., Gomez, A., Zafra, J. J., Maes, J., Mazy, E., Mazzoli, A., Meseguer, J., Morales, R., Orban, A., Pastor Morales, M., Perez Grande, I., Rodriguez Gomez, J., Saggin, Bortolino, Samain, V., Sanz Andres, A., Sanz, R., Simar, J. F., Thibert, T., European Space Agency, UK Space Agency, and Belgian Science Policy Office

Subjects
Solar occultation, Radiometric model, Occultation, Signal, law.invention, Orbiter, Optics, law, Atomic and Molecular Physics, Nadir, Optical constants, Science objectives, Remote sensing, Physics, Martian, business.industry, Signal to noise, Atmosphere of Mars, IR spectral range, Atomic and Molecular Physics, and Optics, Trace gas, Wavelength, Optical models, Atmospheric absorption, and Optics, business, Martian atmospheres
Abstract

The NOMAD instrument has been designed to best fulfil the science objectives of the ExoMars Trace Gas Orbiter mission that will be launched in 2016. The instrument is a combination of three channels that cover the UV, visible and IR spectral ranges and can perform solar occultation, nadir and limb observations. In this series of two papers, we present the optical models representing the three channels of the instrument and use them to determine signal to noise levels for different observation modes and Martian conditions. In this first part, we focus on the UVIS channel, which will sound the Martian atmosphere using nadir and solar occultation viewing modes, covering the 200-650nm spectral range. High SNR levels (, NOMAD has been made possible thanks to funding by the Belgian Science Policy Office (BELSPO) and financial and contractual coordination by the ESA Prodex Office (contracts no 4000107727 and 4000103401). The research was performed as part of the >Interuniversity Attraction Poles> programme financed by the Belgian government (Planet TOPERS, contract PAI no P7/15). UK funding is acknowledged under the UK Space Agency grant ST/I003061/1.

Published
2015

35. Science objectives and performances of NOMAD, a spectrometer suite for the ExoMars TGO mission

Author

Vandaele, A. C, Neefs, E., Drummond, R., Thomas, I. R., Daerden, F., Lopez Moreno, J. J., Rodriguez, J., Patel, M. R., Bellucci, G., Allen, M., Altieri, F., Bolsée, D., Clancy, T., Delanoye, S., Depiesse, C., Cloutis, E., Fedorova, A., Formisano, V., Funke, B., Fussen, D., Geminale, A., Gérard, J. C., Giuranna, M., Ignatiev, N., Kaminski, J., Karatekin, O., Lefèvre, F., López Puertas, M., López Valverde, M., Mahieux, A., Mcconnell, J., Mumma, M., Neary, L., Renotte, E., Ristic, B., Robert, S., Smith, M., Trokhimovsky, S., Vanderauwera, J., Villanueva, G., Whiteway, J., Wilquet, V., Wolff, M., Vandaele, Ann Carine, Lopez Moreno, Jose Juan, Bellucci, Giancarlo, Patel, Manish, Allen, Mark, Altieri, Francesca, Aoki, Shohei, Bolsée, David, Clancy, Todd, Cloutis, Edward, Daerden, Frank, Depiesse, Cédric, Fedorova, Anna, Formisano, Vittorio, Funke, Bernd, Fussen, Didier, Garcia Comas, Maya, Geminale, Anna, Gérard, Jean Claude, Gillotay, Didier, Giuranna, Marco, Gonzalez Galindo, Francisco, Ignatiev, Nicolai, Kaminski, Jacek, Karatekin, Ozgur, Kasabe, Yasumasa, Lefèvre, Franck, Lewis, Stephen, López Puertas, Manuel, López Valverde, Miguel, Mahieux, Arnaud, Mason, Jon, Mumma, Mike, Neary, Lori, Neefs, Eddy, Renotte, Etienne, Robert, Séverine, Sindoni, Giuseppe, Smith, Mike, Thomas, Ian R., Trokhimovsky, Sacha, Vander Auwera, Jean, Villanueva, Geronimo, Whiteway, Jim, Willame, Yannick, Wilquet, Valerie, Wolff, Mike, Alonso Rodrigo, Gustavo, Aparicio Del Moral, Beatriz, Barzin, Pascal, Ben Moussa, Ali, Berkenbosch, Sophie, Biondi, David, Bonnewijn, Sabrina, Candini, Gian Paolo, Clairquin, Roland, Cubas, Javier, Delanoye, Sofie, Giordanengo, Boris, Gissot, Samuel, Gomez, Alejandro, Zafra, Jose Jeronimo, Leese, Mark, Maes, Jeroen, Mazy, Emmanuel, Mazzoli, Alexandra, Meseguer, Jose, Morales, Rafael, Orban, Anne, Pastor Morales, Maria Del Carmen, Perez Grande, Isabel, Ristic, Bojan, Rodriguez Gomez, Julio, Saggin, Bortolino, Samain, Valérie, Sanz Andres, Angel, Sanz, Rosario, Simar, Juan Felipe, Thibert, Tanguy, Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB), Instituto de Astrofísica de Andalucía (IAA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), The Open University [Milton Keynes] (OU), Istituto di Astrofisica e Planetologia Spaziali - INAF (IAPS), Istituto Nazionale di Astrofisica (INAF), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Space Science Institute [Boulder] (SSI), Department of Geography [Winnipeg], University of Winnipeg, Space Research Institute of the Russian Academy of Sciences (IKI), Russian Academy of Sciences [Moscow] (RAS), Laboratoire de Physique Atmosphérique et Planétaire (LPAP), Université de Liège, York University [Toronto], Royal Observatory of Belgium [Brussels] (ROB), 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), NASA Goddard Space Flight Center (GSFC), Centre Spatial de Liège (CSL), Spectroscopie de l'atmosphère, Service de Chimie Quantique et Photophysique, Université libre de Bruxelles (ULB), and Catholic University of America

Subjects
[SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Solar, Occultation, law.invention, Orbiter, Mars atmosphere, law, Nadir, Aerosol, Observations, Spectroscopy, Ultraviolet, Remote sensing, Spectrometer, [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], Suite, Astronomy and Astrophysics, Mars Exploration Program, Atmosphere of Mars, ExoMars, Trace gas, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Space and Planetary Science, Visible, Composition, Infrared, Methane, Occultation Nadir, Environmental science
Abstract

International audience; The NOMAD spectrometer suite on the ExoMars Trace Gas Orbiter will map the composition and distribution of Mars' atmospheric trace species in unprecedented detail, fulfilling many of the scientific objectives of the joint ESA-Roscosmos ExoMars Trace Gas Orbiter mission. The instrument is a combination of three channels, covering a spectral range from the UV to the IR, and can perform solar occultation, nadir and limb observations. In this paper, we present the science objectives of the instrument and how these objectives have influenced the design of the channels. We also discuss the expected performance of the instrument in terms of coverage and detection sensitivity.

Published
2015

36. Metrology of the Solar Spectral Irradiance at the Top Of Atmosphere in the Near Infrared Measured at Mauna Loa Observatory: The PYR-ILIOS campaign.

Author

Pereira, Nuno, Bolsée, David, Sperfeld, Peter, Pape, Sven, Sluse, Dominique, and Cessateur, Gaël

Subjects
*SPECTRAL irradiance, *NEAR infrared radiation
Abstract

The near infrared (NIR) part of the solar spectrum is of prime importance for the solar physics and climatology, directly intervening in the Earth's radiation budget. Despite its major role, available solar spectral irradiance (SSI) NIR datasets, space-borne or ground based, present discrepancies caused by instrumental or methodological reasons. We present new results obtained from the PYR-ILIOS campaign, which is a replication of the previous IRSPERAD campaign which took place in 2011 at the Izaña Observatory (IZO). We used the same instrument and primary calibration source of spectral irradiance. A new site was chosen for PYR-ILIOS: the Mauna-Loa observatory in Hawaii (3397masl), approximately 1000m higher than IZO. Relatively to IRSPERAD, the methodology of monitoring the traceability to the primary calibration source was improved. The results as well as a detailed error budget are presented. We demonstrate that the most recent results, from PYR-ILIOS and other space-borne and ground-based experiments show an NIR SSI lower than ATLAS3 for wavelengths above 1.6μm. [ABSTRACT FROM AUTHOR]

Published
2018
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39. MAJIS VIS-NIR channel: performances of the focal plane unit - flight model.

Author

Haffoud, Paolo, Arondel, Antoine, Bolsée, David, Carlier, Vincent, Carter, John, Cisneros-González, Miriam, Dubois, Jean-Pierre, Dumesnil, Cydalise, Filacchione, Gianrico, Gonnod, Ludovic, Hannou, Cyrille, Hervier, Véronique, Karatekin, Özgür, Ketchazo, Christian, Langevin, Yves, Le Clec'h, Jean-Christophe, Lecomte, Benoit, Morinaud, Gilles, Pereira, Nuno, and Piccioni, Giuseppe

Published
2022
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42. MAJIS VIS-NIR channel: performances of the focal plane unit - flight model

Author

Coyle, Laura E., Matsuura, Shuji, Perrin, Marshall D., Haffoud, Paolo, Arondel, Antoine, Bolsée, David, Carlier, Vincent, Carter, John, Cisneros-González, Miriam, Dubois, Jean-Pierre, Dumesnil, Cydalise, Filacchione, Gianrico, Gonnod, Ludovic, Hannou, Cyrille, Hervier, Véronique, Karatekin, Özgür, Ketchazo, Christian, Langevin, Yves, Le Clec'h, Jean-Christophe, Lecomte, Benoit, Morinaud, Gilles, Pereira, Nuno, Piccioni, Giuseppe, Vandaele, Ann-Carine, Van Laeken, Lionel, Vincendon, Mathieu, and Poulet, Francois

Published
2022
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44. Martian dust storm impact on atmospheric H₂O and D/H observed by ExoMars Trace Gas Orbiter

Author

Vandaele, Ann Carine, Korablev, Oleg, Daerden, Frank, Aoki, Shohei, Thomas, Ian R., Altieri, Francesca, López-Valverde, Miguel, Villanueva, Geronimo, Liuzzi, Giuliano, Smith, Michael D., Erwin, Justin T., Trompet, Loïc, Fedorova, Anna A., Montmessin, Franck, Trokhimovskiy, Alexander, Belyaev, Denis A., Ignatiev, Nikolay I., Luginin, Mikhail, Olsen, Kevin S., Baggio, Lucio, Alday, Juan, Bertaux, Jean-Loup, Betsis, Daria, Bolsée, David, Clancy, R. Todd, Cloutis, Edward, Depiesse, Cédric, Funke, Bernd, Garcia-Comas, Maia, Gérard, Jean-Claude, Giuranna, Marco, Gonzalez-Galindo, Francisco, Grigoriev, Alexey V., Ivanov, Yuriy S., Kaminski, Jacek, Karatekin, Ozgur, Lefèvre, Franck, Lewis, Stephen, López-Puertas, Manuel, Mahieux, Arnaud, Maslov, Igor, Mason, Jon, Mumma, Michael J., Neary, Lori, Neefs, Eddy, Patrakeev, Andrey, Patsaev, Dmitry, Ristic, Bojan, Robert, Séverine, Schmidt, Frédéric, Shakun, Alexey, Teanby, Nicholas A., Viscardy, Sébastien, Willame, Yannick, Whiteway, James, Wilquet, Valérie, Wolff, Michael J., Bellucci, Giancarlo, Patel, Manish R., López-Moreno, Jose-Juan, Forget, François, Wilson, Colin F., Svedhem, Håkan, Vago, Jorge L., and Rodionov, Daniel

Subjects
13. Climate action, 520 Astronomy, 620 Engineering
Abstract

Global dust storms on Mars are rare but can affect the Martian atmosphere for several months. They can cause changes in atmospheric dynamics and inflation of the atmosphere, primarily owing to solar heating of the dust. In turn, changes in atmospheric dynamics can affect the distribution of atmospheric water vapour, with potential implications for the atmospheric photochemistry and climate on Mars. Recent observations of the water vapour abundance in the Martian atmosphere during dust storm conditions revealed a high-altitude increase in atmospheric water vapour that was more pronounced at high northern latitudes, as well as a decrease in the water column at low latitudes. Here we present concurrent, high-resolution measurements of dust, water and semiheavy water (HDO) at the onset of a global dust storm, obtained by the NOMAD and ACS instruments onboard the ExoMars Trace Gas Orbiter. We report the vertical distribution of the HDO/H₂O ratio (D/H) from the planetary boundary layer up to an altitude of 80 kilometres. Our findings suggest that before the onset of the dust storm, HDO abundances were reduced to levels below detectability at altitudes above 40 kilometres. This decrease in HDO coincided with the presence of water-ice clouds. During the storm, an increase in the abundance of H₂O and HDO was observed at altitudes between 40 and 80 kilometres. We propose that these increased abundances may be the result of warmer temperatures during the dust storm causing stronger atmospheric circulation and preventing ice cloud formation, which may confine water vapour to lower altitudes through gravitational fall and subsequent sublimation of ice crystals. The observed changes in H₂O and HDO abundance occurred within a few days during the development of the dust storm, suggesting a fast impact of dust storms on the Martian atmosphere.

45. Martian dust storm impact on atmospheric H2O and D/H observed by ExoMars Trace Gas Orbiter

Author

Vandaele, Ann Carine, Korablev, Oleg, Daerden, Frank, Aoki, Shohei, Thomas, Ian R, Altieri, Francesca, López-Valverde, Miguel, Villanueva, Geronimo, Liuzzi, Giuliano, Smith, Michael D, Erwin, Justin T, Trompet, Loïc, Fedorova, Anna A, Montmessin, Franck, Trokhimovskiy, Alexander, Belyaev, Denis A, Ignatiev, Nikolay I, Luginin, Mikhail, Olsen, Kevin S, Baggio, Lucio, Alday, Juan, Bertaux, Jean-Loup, Betsis, Daria, Bolsée, David, Clancy, R Todd, Cloutis, Edward, Depiesse, Cédric, Funke, Bernd, Garcia-Comas, Maia, Gérard, Jean-Claude, Giuranna, Marco, Gonzalez-Galindo, Francisco, Grigoriev, Alexey V, Ivanov, Yuriy S, Kaminski, Jacek, Karatekin, Ozgur, Lefèvre, Franck, Lewis, Stephen, López-Puertas, Manuel, Mahieux, Arnaud, Maslov, Igor, Mason, Jonathon, Mumma, Michael J, Neary, Lori, Neefs, Eddy, Patrakeev, Andrey, Patsaev, Dmitry, Ristic, Bojan, Robert, Séverine, Schmidt, Frédéric, Shakun, Alexey, Teanby, Nicholas A, Viscardy, Sébastien, Willame, Yannick, Whiteway, James, Wilquet, Valérie, Wolff, Michael J, Bellucci, Giancarlo, Patel, Manish, López-Moreno, Jose-Juan, Forget, François, Wilson, Colin F, Svedhem, Håkan, Vago, Jorge L, Rodionov, Daniel, Vandaele, Ann Carine, Korablev, Oleg, Daerden, Frank, Aoki, Shohei, Thomas, Ian R, Altieri, Francesca, López-Valverde, Miguel, Villanueva, Geronimo, Liuzzi, Giuliano, Smith, Michael D, Erwin, Justin T, Trompet, Loïc, Fedorova, Anna A, Montmessin, Franck, Trokhimovskiy, Alexander, Belyaev, Denis A, Ignatiev, Nikolay I, Luginin, Mikhail, Olsen, Kevin S, Baggio, Lucio, Alday, Juan, Bertaux, Jean-Loup, Betsis, Daria, Bolsée, David, Clancy, R Todd, Cloutis, Edward, Depiesse, Cédric, Funke, Bernd, Garcia-Comas, Maia, Gérard, Jean-Claude, Giuranna, Marco, Gonzalez-Galindo, Francisco, Grigoriev, Alexey V, Ivanov, Yuriy S, Kaminski, Jacek, Karatekin, Ozgur, Lefèvre, Franck, Lewis, Stephen, López-Puertas, Manuel, Mahieux, Arnaud, Maslov, Igor, Mason, Jonathon, Mumma, Michael J, Neary, Lori, Neefs, Eddy, Patrakeev, Andrey, Patsaev, Dmitry, Ristic, Bojan, Robert, Séverine, Schmidt, Frédéric, Shakun, Alexey, Teanby, Nicholas A, Viscardy, Sébastien, Willame, Yannick, Whiteway, James, Wilquet, Valérie, Wolff, Michael J, Bellucci, Giancarlo, Patel, Manish, López-Moreno, Jose-Juan, Forget, François, Wilson, Colin F, Svedhem, Håkan, Vago, Jorge L, and Rodionov, Daniel

Abstract

Global dust storms on Mars are rare but can affect the Martian atmosphere for several months. They can cause changes in atmospheric dynamics and inflation of the atmosphere, primarily owing to solar heating of the dust. In turn, changes in atmospheric dynamics can affect the distribution of atmospheric water vapour, with potential implications for the atmospheric photochemistry and climate on Mars. Recent observations of the water vapour abundance in the Martian atmosphere during dust storm conditions revealed a high-altitude increase in atmospheric water vapour that was more pronounced at high northern latitudes, as well as a decrease in the water column at low latitudes. Here we present concurrent, high-resolution measurements of dust, water and semiheavy water (HDO) at the onset of a global dust storm, obtained by the NOMAD and ACS instruments onboard the ExoMars Trace Gas Orbiter. We report the vertical distribution of the HDO/H O ratio (D/H) from the planetary boundary layer up to an altitude of 80 kilometres. Our findings suggest that before the onset of the dust storm, HDO abundances were reduced to levels below detectability at altitudes above 40 kilometres. This decrease in HDO coincided with the presence of water-ice clouds. During the storm, an increase in the abundance of H2O and HDO was observed at altitudes between 40 and 80 kilometres. We propose that these increased abundances may be the result of warmer temperatures during the dust storm causing stronger atmospheric circulation and preventing ice cloud formation, which may confine water vapour to lower altitudes through gravitational fall and subsequent sublimation of ice crystals. The observed changes in H2O and HDO abundance occurred within a few days during the development of the dust storm, suggesting a fast impact of dust storms on the Martian atmosphere.

46. NOMAD spectrometer on the ExoMars trace gas orbiter mission: part 2—design, manufacturing, and testing of the ultraviolet and visible channel

Author

Patel, Manish R., Antoine, Philippe, Mason, Jonathon, Leese, Mark, Hathi, Brijen, Stevens, Adam H., Dawson, Daniel, Gow, Jason, Ringrose, Timothy, Holmes, James, Lewis, Stephen R., Beghuin, Didier, van Donink, Philip, Ligot, Renaud, Dewandel, Jean-Luc, Hu, Daohua, Bates, Doug, Cole, Richard, Drummond, Rachel, Thomas, Ian R., Depiesse, Cédric, Neefs, Eddy, Equeter, Eddy, Ristic, Bojan, Berkenbosch, Sophie, Bolsée, David, Willame, Yannick, Vandaele, Ann Carine, Lesschaeve, Stefan, De Vos, Lieve, Van Vooren, Nico, Thibert, Tanguy, Mazy, Emmanuel, Rodriguez-Gomez, Julio, Morales, Rafael, Candini, Gian Paolo, Pastor-Morales, M. Carmen, Sanz, Rosario, Aparicio del Moral, Beatriz, Jeronimo-Zafra, José-Maria, Gómez-López, Juan Manuel, Alonso-Rodrigo, Gustavo, Pérez-Grande, Isabel, Cubas, Javier, Gomez-Sanjuan, Alejandro M., Navarro-Medina, Fermín, BenMoussa, Ali, Giordanengo, Boris, Gissot, Samuel, Bellucci, Giancarlo, Lopez-Moreno, Jose Juan, Patel, Manish R., Antoine, Philippe, Mason, Jonathon, Leese, Mark, Hathi, Brijen, Stevens, Adam H., Dawson, Daniel, Gow, Jason, Ringrose, Timothy, Holmes, James, Lewis, Stephen R., Beghuin, Didier, van Donink, Philip, Ligot, Renaud, Dewandel, Jean-Luc, Hu, Daohua, Bates, Doug, Cole, Richard, Drummond, Rachel, Thomas, Ian R., Depiesse, Cédric, Neefs, Eddy, Equeter, Eddy, Ristic, Bojan, Berkenbosch, Sophie, Bolsée, David, Willame, Yannick, Vandaele, Ann Carine, Lesschaeve, Stefan, De Vos, Lieve, Van Vooren, Nico, Thibert, Tanguy, Mazy, Emmanuel, Rodriguez-Gomez, Julio, Morales, Rafael, Candini, Gian Paolo, Pastor-Morales, M. Carmen, Sanz, Rosario, Aparicio del Moral, Beatriz, Jeronimo-Zafra, José-Maria, Gómez-López, Juan Manuel, Alonso-Rodrigo, Gustavo, Pérez-Grande, Isabel, Cubas, Javier, Gomez-Sanjuan, Alejandro M., Navarro-Medina, Fermín, BenMoussa, Ali, Giordanengo, Boris, Gissot, Samuel, Bellucci, Giancarlo, and Lopez-Moreno, Jose Juan

Abstract

NOMAD is a spectrometer suite on board the ESA/Roscosmos ExoMars Trace Gas Orbiter, which launched in March 2016. NOMAD consists of two infrared channels and one ultraviolet and visible channel, allowing the instrument to perform observations quasi-constantly, by taking nadir measurements at the day- and night-side, and during solar occultations. Here, in part 2 of a linked study, we describe the design, manufacturing, and testing of the ultraviolet and visible spectrometer channel called UVIS. We focus upon the optical design and working principle where two telescopes are coupled to a single grating spectrometer using a selector mechanism.

47. Martian dust storm impact on atmospheric H2O and D/H observed by ExoMars Trace Gas Orbiter

Author

Vandaele, Ann Carine, Korablev, Oleg, Daerden, Frank, Aoki, Shohei, Thomas, Ian R, Altieri, Francesca, López-Valverde, Miguel, Villanueva, Geronimo, Liuzzi, Giuliano, Smith, Michael D, Erwin, Justin T, Trompet, Loïc, Fedorova, Anna A, Montmessin, Franck, Trokhimovskiy, Alexander, Belyaev, Denis A, Ignatiev, Nikolay I, Luginin, Mikhail, Olsen, Kevin S, Baggio, Lucio, Alday, Juan, Bertaux, Jean-Loup, Betsis, Daria, Bolsée, David, Clancy, R Todd, Cloutis, Edward, Depiesse, Cédric, Funke, Bernd, Garcia-Comas, Maia, Gérard, Jean-Claude, Giuranna, Marco, Gonzalez-Galindo, Francisco, Grigoriev, Alexey V, Ivanov, Yuriy S, Kaminski, Jacek, Karatekin, Ozgur, Lefèvre, Franck, Lewis, Stephen, López-Puertas, Manuel, Mahieux, Arnaud, Maslov, Igor, Mason, Jonathon, Mumma, Michael J, Neary, Lori, Neefs, Eddy, Patrakeev, Andrey, Patsaev, Dmitry, Ristic, Bojan, Robert, Séverine, Schmidt, Frédéric, Shakun, Alexey, Teanby, Nicholas A, Viscardy, Sébastien, Willame, Yannick, Whiteway, James, Wilquet, Valérie, Wolff, Michael J, Bellucci, Giancarlo, Patel, Manish, López-Moreno, Jose-Juan, Forget, François, Wilson, Colin F, Svedhem, Håkan, Vago, Jorge L, Rodionov, Daniel, Vandaele, Ann Carine, Korablev, Oleg, Daerden, Frank, Aoki, Shohei, Thomas, Ian R, Altieri, Francesca, López-Valverde, Miguel, Villanueva, Geronimo, Liuzzi, Giuliano, Smith, Michael D, Erwin, Justin T, Trompet, Loïc, Fedorova, Anna A, Montmessin, Franck, Trokhimovskiy, Alexander, Belyaev, Denis A, Ignatiev, Nikolay I, Luginin, Mikhail, Olsen, Kevin S, Baggio, Lucio, Alday, Juan, Bertaux, Jean-Loup, Betsis, Daria, Bolsée, David, Clancy, R Todd, Cloutis, Edward, Depiesse, Cédric, Funke, Bernd, Garcia-Comas, Maia, Gérard, Jean-Claude, Giuranna, Marco, Gonzalez-Galindo, Francisco, Grigoriev, Alexey V, Ivanov, Yuriy S, Kaminski, Jacek, Karatekin, Ozgur, Lefèvre, Franck, Lewis, Stephen, López-Puertas, Manuel, Mahieux, Arnaud, Maslov, Igor, Mason, Jonathon, Mumma, Michael J, Neary, Lori, Neefs, Eddy, Patrakeev, Andrey, Patsaev, Dmitry, Ristic, Bojan, Robert, Séverine, Schmidt, Frédéric, Shakun, Alexey, Teanby, Nicholas A, Viscardy, Sébastien, Willame, Yannick, Whiteway, James, Wilquet, Valérie, Wolff, Michael J, Bellucci, Giancarlo, Patel, Manish, López-Moreno, Jose-Juan, Forget, François, Wilson, Colin F, Svedhem, Håkan, Vago, Jorge L, and Rodionov, Daniel

Abstract

Global dust storms on Mars are rare but can affect the Martian atmosphere for several months. They can cause changes in atmospheric dynamics and inflation of the atmosphere, primarily owing to solar heating of the dust. In turn, changes in atmospheric dynamics can affect the distribution of atmospheric water vapour, with potential implications for the atmospheric photochemistry and climate on Mars. Recent observations of the water vapour abundance in the Martian atmosphere during dust storm conditions revealed a high-altitude increase in atmospheric water vapour that was more pronounced at high northern latitudes, as well as a decrease in the water column at low latitudes. Here we present concurrent, high-resolution measurements of dust, water and semiheavy water (HDO) at the onset of a global dust storm, obtained by the NOMAD and ACS instruments onboard the ExoMars Trace Gas Orbiter. We report the vertical distribution of the HDO/H O ratio (D/H) from the planetary boundary layer up to an altitude of 80 kilometres. Our findings suggest that before the onset of the dust storm, HDO abundances were reduced to levels below detectability at altitudes above 40 kilometres. This decrease in HDO coincided with the presence of water-ice clouds. During the storm, an increase in the abundance of H2O and HDO was observed at altitudes between 40 and 80 kilometres. We propose that these increased abundances may be the result of warmer temperatures during the dust storm causing stronger atmospheric circulation and preventing ice cloud formation, which may confine water vapour to lower altitudes through gravitational fall and subsequent sublimation of ice crystals. The observed changes in H2O and HDO abundance occurred within a few days during the development of the dust storm, suggesting a fast impact of dust storms on the Martian atmosphere.

48. NOMAD spectrometer on the ExoMars trace gas orbiter mission: part 2—design, manufacturing, and testing of the ultraviolet and visible channel

Author

Patel, Manish R., Antoine, Philippe, Mason, Jonathon, Leese, Mark, Hathi, Brijen, Stevens, Adam H., Dawson, Daniel, Gow, Jason, Ringrose, Timothy, Holmes, James, Lewis, Stephen R., Beghuin, Didier, van Donink, Philip, Ligot, Renaud, Dewandel, Jean-Luc, Hu, Daohua, Bates, Doug, Cole, Richard, Drummond, Rachel, Thomas, Ian R., Depiesse, Cédric, Neefs, Eddy, Equeter, Eddy, Ristic, Bojan, Berkenbosch, Sophie, Bolsée, David, Willame, Yannick, Vandaele, Ann Carine, Lesschaeve, Stefan, De Vos, Lieve, Van Vooren, Nico, Thibert, Tanguy, Mazy, Emmanuel, Rodriguez-Gomez, Julio, Morales, Rafael, Candini, Gian Paolo, Pastor-Morales, M. Carmen, Sanz, Rosario, Aparicio del Moral, Beatriz, Jeronimo-Zafra, José-Maria, Gómez-López, Juan Manuel, Alonso-Rodrigo, Gustavo, Pérez-Grande, Isabel, Cubas, Javier, Gomez-Sanjuan, Alejandro M., Navarro-Medina, Fermín, BenMoussa, Ali, Giordanengo, Boris, Gissot, Samuel, Bellucci, Giancarlo, Lopez-Moreno, Jose Juan, Patel, Manish R., Antoine, Philippe, Mason, Jonathon, Leese, Mark, Hathi, Brijen, Stevens, Adam H., Dawson, Daniel, Gow, Jason, Ringrose, Timothy, Holmes, James, Lewis, Stephen R., Beghuin, Didier, van Donink, Philip, Ligot, Renaud, Dewandel, Jean-Luc, Hu, Daohua, Bates, Doug, Cole, Richard, Drummond, Rachel, Thomas, Ian R., Depiesse, Cédric, Neefs, Eddy, Equeter, Eddy, Ristic, Bojan, Berkenbosch, Sophie, Bolsée, David, Willame, Yannick, Vandaele, Ann Carine, Lesschaeve, Stefan, De Vos, Lieve, Van Vooren, Nico, Thibert, Tanguy, Mazy, Emmanuel, Rodriguez-Gomez, Julio, Morales, Rafael, Candini, Gian Paolo, Pastor-Morales, M. Carmen, Sanz, Rosario, Aparicio del Moral, Beatriz, Jeronimo-Zafra, José-Maria, Gómez-López, Juan Manuel, Alonso-Rodrigo, Gustavo, Pérez-Grande, Isabel, Cubas, Javier, Gomez-Sanjuan, Alejandro M., Navarro-Medina, Fermín, BenMoussa, Ali, Giordanengo, Boris, Gissot, Samuel, Bellucci, Giancarlo, and Lopez-Moreno, Jose Juan

Abstract

NOMAD is a spectrometer suite on board the ESA/Roscosmos ExoMars Trace Gas Orbiter, which launched in March 2016. NOMAD consists of two infrared channels and one ultraviolet and visible channel, allowing the instrument to perform observations quasi-constantly, by taking nadir measurements at the day- and night-side, and during solar occultations. Here, in part 2 of a linked study, we describe the design, manufacturing, and testing of the ultraviolet and visible spectrometer channel called UVIS. We focus upon the optical design and working principle where two telescopes are coupled to a single grating spectrometer using a selector mechanism.

49. Calibration of the NOMAD-UVIS data

Author

Willame, Yannick, Depiesse, Cédric, Mason, Jonathon P., Thomas, Ian R., Patel, Manish R., Hathi, Brijen, Leese, Mark R., Bolsée, David, Wolff, Michael J., Trompet, Loïc, Vandaele, Ann Carine, Piccialli, Arianna, Aoki, Shohei, Ristic, Bojan, Neefs, Eddy, Beeckman, Bram, Berkenbosch, Sophie, Clairquin, Roland, Mahieux, Arnaud, Pereira, Nuno, Robert, Séverine, Viscardy, Sébastien, Wilquet, Valérie, Daerden, Frank, Lopez-Moreno, José Juan, Bellucci, Giancarlo, Willame, Yannick, Depiesse, Cédric, Mason, Jonathon P., Thomas, Ian R., Patel, Manish R., Hathi, Brijen, Leese, Mark R., Bolsée, David, Wolff, Michael J., Trompet, Loïc, Vandaele, Ann Carine, Piccialli, Arianna, Aoki, Shohei, Ristic, Bojan, Neefs, Eddy, Beeckman, Bram, Berkenbosch, Sophie, Clairquin, Roland, Mahieux, Arnaud, Pereira, Nuno, Robert, Séverine, Viscardy, Sébastien, Wilquet, Valérie, Daerden, Frank, Lopez-Moreno, José Juan, and Bellucci, Giancarlo

Abstract

The Ultraviolet and VIsible Spectrometer (UVIS), covering the 200–650 ​nm range, is one of three spectrometers that comprise the NOMAD instrument on the ExoMars 2016 Trace Gas Orbiter (TGO). UVIS can operate in solar occultation, nadir and limb viewing mode and was designed to monitor ozone and aerosols in the Martian atmosphere. Here, we describe the calibration procedure to convert the UVIS raw data into a calibrated data product ready for scientific exploitation. The calibration includes the CCD offset and dark current subtraction, the wavelength assignment, the noise identification and removal, the smearing removal, and the radiance or transmittance conversion. A straylight correction, critical for some parts of the UVIS spectral range, is also applied during the data reduction process, which is described in more detail in two companion papers [Mason et al., 2022; Depiesse et al., In prep] corresponding to two different and independent methods giving consistent results. The solar occultation observations are converted into transmittance and are therefore self-calibrating, while nadir and limb measurements require an absolute radiometric calibration. A comparison with coincident nadir MRO/MARCI measurements is provided as a final validation and generally shows a ±10% agreement on the radiances measured by both instruments.

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