Search

Your search keyword '"Lemmon, M."' showing total 676 results
Start Over Author "Lemmon, M."
676 results on '"Lemmon, M."'

53. Hexagonal Prisms Form in Water‐Ice Clouds on Mars, Producing Halo Displays Seen by Perseverance Rover

Author

Lemmon, M. T., primary, Toledo, D., additional, Apestigue, V., additional, Arruego, I., additional, Wolff, M. J., additional, Patel, P., additional, Guzewich, S., additional, Colaprete, A., additional, Vicente‐Retortillo, Á., additional, Tamppari, L., additional, Montmessin, F., additional, de la Torre Juarez, M., additional, Maki, J., additional, McConnochie, T., additional, Brown, A., additional, and Bell, J. F., additional

Published
2022
Full Text
View/download PDF

54. Dust, Sand, and Winds Within an Active Martian Storm in Jezero Crater

Author

Lemmon, M. T., primary, Smith, M. D., additional, Viudez‐Moreiras, D., additional, de la Torre‐Juarez, M., additional, Vicente‐Retortillo, A., additional, Munguira, A., additional, Sanchez‐Lavega, A., additional, Hueso, R., additional, Martinez, G., additional, Chide, B., additional, Sullivan, R., additional, Toledo, D., additional, Tamppari, L., additional, Bertrand, T., additional, Bell, J. F., additional, Newman, C., additional, Baker, M., additional, Banfield, D., additional, Rodriguez‐Manfredi, J. A., additional, Maki, J. N., additional, and Apestigue, V., additional

Published
2022
Full Text
View/download PDF

56. MALDI-TOF Mass Spectrometric Detection of SARS-CoV-2 Using Cellulose Sulfate Ester Enrichment and Hot Acid Treatment

Author

Chen, Dapeng, primary, Bryden, Wayne A., additional, Fenselau, Catherine, additional, McLoughlin, Michael, additional, Haddaway, Caroline R., additional, Devin, Alese P., additional, Caton, Emily R., additional, Bradrick, Shelton S., additional, Miller, Joy M., additional, Tacheny, Erin A., additional, Lemmon, M. Megan, additional, and Bogan, Joseph, additional

Published
2022
Full Text
View/download PDF

57. First Results from Atmospheric Observations of CO2, H2O, and CO from SuperCam on Mars2020-Pereverance Rover

Author

Montmessin, Franck, Mcconnochie, T., Fouchet, T., Royer, C., Knutsen, Elise Wright, Bertrand, T., Forni, O., Pilleri, P., Gasnault, O., Lacombe, Gaetan, Lasue, J., Legett, C., Lemmon, M. T., Newell, T., Venhaus, D. M., Maurice, S., Wiens, R. C., PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (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), Space Science Institute [Boulder] (SSI), Pôle Planétologie du LESIA, Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), 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), 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), Los Alamos National Laboratory (LANL), University of Maryland [College Park], and University of Maryland System

Subjects
[SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP]
Abstract

International audience; Not Available

Published
2022

58. The mechanical properties of the Martian soil at the InSight landing site

Author

Delage, P., Marteau, E., Vrettos, C., Golombek, M., Asan-Mangold, V., Banerdt, B., Grott, Matthias, Hurst, K., Lognonne, P., Murdoch, N., Piqueux, S., Schmelzbach, C., Spohn, Tilman, Warner, N., Widmer-Schnidrig, Rudolf, Brinkmann, Nienke, Caicedo-Hormaza, B., Castillo-Betancourt, J.P, Edme, P., Kedar, S., Lange, L., Lemmon, M., Mueller, N., Onodera, K, Robertsson, J., Solberger, D., Stähler, S., Verdier, N, and Williams, N.R.

Subjects
InSight Mars Regolith Mechanische Bodeneigenschaften
Published
2022

60. The Mars Science Laboratory Curiosity Rover Mastcam Instruments: Preflight and In-Flight Calibration, Validation, and Data Archiving

Author

Bell, J. F., III, Godber, A, McNair, S, Caplinger, M. A, Maki, J. N, Lemmon, M. T, Van Beek, J, Malin, M. C, Wellington, D, Kinch, K. M, Madsen, M. B, Hardgrove, C, Ravine, M. A, Jensen, E, Harker, D, Anderson, R. B, Herkenhoff, K. E, Morris, R. V, Cisneros, E, and Deen, R. G

Subjects
Instrumentation And Photography
Abstract

The NASA Curiosity rover Mast Camera (Mastcam) system is a pair of fixed-focal length, multispectral, color CCD imagers mounted approximately 2 m above the surface on the rover's remote sensing mast, along with associated electronics and an onboard calibration target. The left Mastcam (M-34) has a 34 mm focal length, an instantaneous field of view (IFOV) of 0.22 mrad, and a FOV of 20 deg × 15 deg over the full 1648 × 1200 pixel span of its Kodak KAI-2020 CCD. The right Mastcam (M-100) has a 100 mm focal length, an IFOV of 0.074 mrad, and a FOV of 6.8 deg × 5.1 deg using the same detector. The cameras are separated by 24.2 cm on the mast, allowing stereo images to be obtained at the resolution of the M-34 camera. Each camera has an eight-position filter wheel, enabling it to take Bayer pattern red, green, and blue (RGB) 'true color' images, multispectral images in nine additional bands spanning approximately 400-1100 nm, and images of the Sun in two colors through neutral density-coated filters. An associated Digital Electronics Assembly provides command and data interfaces to the rover, 8 Gb of image storage per camera, 11 bit to 8 bit companding, JPEG compression, and acquisition of high-definition video. Here we describe the preflight and in-flight calibration of Mastcam images, the ways that they are being archived in the NASA Planetary Data System, and the ways that calibration refinements are being developed as the investigation progresses on Mars. We also provide some examples of data sets and analyses that help to validate the accuracy and precision of the calibration.

Published
2017
Full Text
View/download PDF

61. Aerosol Optical Depth as Observed by the Mars Science Laboratory REMS UV Photodiodes

Author

Smith, M. D, Zorzano, M.-P, Lemmon, M, Martin-Torres, J, and Mendaza de Cal, T

Subjects
Lunar And Planetary Science And Exploration
Abstract

Systematic observations taken by the REMS UV photodiodes on a daily basis throughout the landed Mars Science Laboratory mission provide a highly useful tool for characterizing aerosols above Gale Crater. Radiative transfer modeling is used to model the approximately two Mars Years of observations taken to date taking into account multiple scattering from aerosols and the extended field of view of the REMS UV photodiodes. The retrievals show in detail the annual cycle of aerosol optical depth, which is punctuated with numerous short timescale events of increased optical depth. Dust deposition onto the photodiodes is accounted for by comparison with aerosol optical depth derived from direct imaging of the Sun by Mastcam. The effect of dust on the photodiodes is noticeable, but does not dominate the signal. Cleaning of dust from the photodiodes was observed in the season around Ls=270deg, but not during other seasons. Systematic deviations in the residuals from the retrieval fit are indicative of changes in aerosol effective particle size, with larger particles present during periods of increased optical depth. This seasonal dependence of aerosol particle size is expected as dust activity injects larger particles into the air, while larger aerosols settle out of the atmosphere more quickly leading to a smaller average particle size over time. A full description of these observations, the retrieval algorithm, and the results can be found in Smith et al. (2016).

Published
2017

62. MASTCAM-Z IN JEZERO CRATER: OVERVIEW AND STATUS UPDATE

Author

Maki, J., Bell III, James F., Mehall, G., Ravine, M. A., Caplinger, M. A., Saxton, K. N., Kinch, K., Madsen, M.B., Rice, M S, Cisneros, E., Ehlmann, B. L., Hayes, Alex, Horgan, B., Jensen, E., Johnson, J. R., Paris, Kristen, Winhold, A., Betts, Bruce H., Wolff, M.J., Bailey, A., Barrington, M.N., Cloutis, E., Cluff, N., Coates, A., Colaprete, A., Corlies, P, Crawford, K., Deen, R. G., Edgett, K., Fagents, Sarah, Fleron, S.Z., Grotzinger, J. P., Gwinner, Klaus, Hansen, M.D., Hardgrove, C., Herkenhoff, K. E., Jaumann, R., Lemmon, M., Mehall, L., Núnez, Jorge I., Paar, G., Caballo-Perucha, P., Preusker, Frank, Robinson, M.S., Rojas, C., Schmitz, Nicole, Stein, N. T., Sullivan, R., Tate, C., Vaughan, A., Million, Chase, St. Clair, M., Proton, J. B., and Merusi, M.

Subjects
Morphology, Mastcam-Z, Jezero Crater, Multispectral, Mars 2020, Mars, Geology, Perseverance, Imaging
Published
2022

63. First results from Atmospheric Observations of CO2, H2O, O2 and CO Abundances with SuperCam on Mars 2020

Author

Montmessin, Franck, Mcconnochie, T., Fouchet, Thierry, Royer, Clément, Knutsen, Elise Wright, Bertrand, Tanguy, Forni, O., Pilleri, Paolo, Gasnault, Olivier, Lacombe, Gaetan, Lasue, Jérémie, Legett, C., Lemmon, M., Newell, R., Venhaus, D., Maurice, Sylvestre, Wiens, R., PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (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), Space Science Institute [Boulder] (SSI), University of Maryland [College Park], University of Maryland System, Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), 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), Los Alamos National Laboratory (LANL), and Lunar and Planetary Institute

Subjects
[SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology
Abstract

International audience

Published
2022

66. Pleckstrin Homology Domains

Author

Lemmon, M. A., Ferguson, K. M., Compans, R. W., editor, Cooper, M., editor, Hogle, J. H., editor, Ito, Y., editor, Koprowski, H., editor, Melchers, F., editor, Oldstone, M., editor, Olsnes, S., editor, Potter, M., editor, Saedler, H., editor, Vogt, P. K., editor, Wagner, H., editor, and Pawson, Anthony J., editor

Published
1998
Full Text
View/download PDF

67. Mars Water-Ice Clouds and Precipitation

Author

Whiteway, J. A., Komguem, L., Dickinson, C., Cook, C., Illnicki, M., Seabrook, J., Popovici, V., Duck, T. J., Davy, R., Taylor, P. A., Pathak, J., Fisher, D., Carswell, A. I., Daly, M., Hipkin, V., Zent, A. P., Hecht, M. H., Wood, S. E., Tamppari, L. K., Renno, N., Moores, J. E., Lemmon, M. T., Daerden, F., and Smith, P. H.

Published
2009
Full Text
View/download PDF

68. H₂O at the Phoenix Landing Site

Author

Smith, P. H., Tamppari, L. K., Arvidson, R. E., Bass, D., Blaney, D., Boynton, W. V., Carswell, A., Catling, D. C., Clark, B. C., Duck, T., DeJong, E., Fisher, D., Goetz, W., Gunnlaugsson, H. P., Hecht, M. H., Hipkin, V., Hoffman, J., Hviid, S. F., Keller, H. U., Kounaves, S. P., Lange, C. F., Lemmon, M. T., Madsen, M. B., Markiewicz, W. J., Marshall, J., McKay, C. P., Mellon, M. T., Ming, D. W., Morris, R. V., Pike, W. T., Renno, N., Staufer, U., Stoker, C., Taylor, P., Whiteway, J. A., and Zent, A. P.

Published
2009
Full Text
View/download PDF

70. Seasonal seismic activity on Mars

Author

Knapmeyer, Martin, Stähler, S., Daubar, I., Forget, F., Spiga, A., Pierron, T., Van Driel, M., Banfield, D., Hauber, Ernst, Grott, Matthias, Müller, Nils, Perrin, C., Jacob, A., Lucas, A., Knapmeyer-Endrun, B., Newman, C., Panning, M.P., Weber, R.C., Calef, F., Böse, M., Ceylan, S., Charalambous, C., Clinton, J., Dahmen, N., Giardini, D., Horleston, A., Kawamura, T., Khan, A., Mainsant, G., Plasman, M., Lemmon, M., Lorenz, R. D., Pike, W.T., Scholz, J.-R., Lognonne, P., Banerdt, B., Deutsches Zentrum für Luft- und Raumfahrt [Berlin] (DLR), Geological Institute (ETHZ), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), 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 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 Physique du Globe de Paris (IPGP), Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), and Johns Hopkins University (JHU)

Subjects
Mars, Elysium Planitia, InSight, seasonal seismic activity, Phobos, [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], Statistik, [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP], Marsbeben, ComputingMilieux_MISCELLANEOUS
Abstract

The rate of occurrence of High Frequency (HF) marsquakes, as recorded by InSight at Homestead Hollow, Elysium Planitia, increased after about Ls =33°, and ceased almost completely by Ls =187°, following an apparently seasonal variation with a peak rate near aphelion. We define seismic rate models based on the declination of the Sun, annual solar tides, and the annual CO2 cycle as measured by atmospheric pressure. Evaluation of Akaike weights and evidence ratios shows that the declination of the Sun is the most likely, and the CO2 cycle the least likely driver of this seismic activity, although the discrimination is weak, and the occurrence of a few events in August 2020 is in favor for a triggering by CO2 ice load. We also show that no periodicity related to Phobos' orbit is present in the HF event sequence. Event rate forecasts are presented to allow further discrimination of candidate mechanisms from future observations. ISSN:0012-821X ISSN:1385-013X

Published
2021
Full Text
View/download PDF

72. Effects of a Large Dust Storm in the Near‐Surface Atmosphere as Measured by InSight in Elysium Planitia, Mars. Comparison With Contemporaneous Measurements by Mars Science Laboratory

Author

Viúdez-Moreiras, Daniel, Newman, C.E., Forget, F., Lemmon, M., Banfield, D., Spiga, A., Lepinette, Alain, Rodríguez-Manfredi, José Antonio, Gómez-Elvira, Javier, Pla-García, Jorge, Muller, N., Grott, M., TWINS/InSight team, Spiga, A. [0000-0002-6776-6268], Lemmon, M. [0000-0002-4504-5136], Newman, C. [0000-0001-9990-8817], Pla garcía, J. [0000-0002-8047-3937], Mueller, N. [0000-0001-9229-8921], Agencia Estatal de Investigación (AEI), Centre National D'Etudes Spatiales (CNES), Ministerio de Economía y Competitividad (MINECO) ESP2016-79612-C3-1-R, InSight Participating Scientist Grant 80NSSC18K1630, and InSight Participating Scientist Grant

Subjects
Dust storm, animal diseases, media_common.quotation_subject, Mars, Mars Exploration Program, Atmosphere of Mars, Near surface atmospheres, InSight Lander, Astrobiology, Elysium, Atmosphere, Geophysics, Planetenphysik, Mars atmosphere, Space and Planetary Science, Geochemistry and Petrology, dust storm, Gratitude, Elysium Planitia, Earth and Planetary Sciences (miscellaneous), Christian ministry, Geology, media_common
Abstract

NASA's InSight landed in Elysium Planitia (~4.5°N,136°E) at L ~ 296° (November 2018), right after the decay of the 2018 Global Dust Storm (GDS) and before the onset of the 2019 Large Dust Storm (LDS) at L ~ 320° (January 2019). InSight's cameras observed a rise in the atmospheric opacities during the storm from ~0.7 to ~1.9, similarly to contemporaneous measurements by Curiosity in Gale crater. Pressure tides were strongly affected at the locations of InSight and Curiosity. In particular, the diurnal pressure mode experienced an abrupt increase during the onset of the LDS, similar to that measured by Curiosity, most likely due to longitudinally asymmetric dust loading. Later, the dust was redistributed around the planet and the semidiurnal mode evolved according to dust opacity in both missions. Before and after the onset of the storm, the observed wind patterns resulted from the interaction between regional and local slope flows induced by topography, which all produced a diurnal perturbation superimposed on a mean flow, dominated by the Hadley cell but with modifications due to channeling effects from the regional topography. However, the onset of the LDS modified this to a scenario consistent with enhanced tidal flows. The local air temperatures are strongly perturbed by the lander's thermal effects, and their retrieval significantly depends on wind patterns, which changed during the course of the dust storm. Observations suggest a decrease in convective vortices during the dust storm; however, vortex activity remained strong during the storm's onset due to the increase in wind speeds., With funding from the Spanish government through the "María de Maeztu Unit of Excellence" accreditation (MDM-2017-0737)

Published
2020
Full Text
View/download PDF

76. Atmospheric Tides in Gale Crater, Mars

Author

Guzewich, Scott D, Newman, C. E, de la Torre Juarez, M, Wilson, R. J, Lemmon, M, Smith, M. D, Kahanpaa, H, and Harri, A.-M

Subjects
Lunar And Planetary Science And Exploration
Abstract

Atmospheric tides are the primary source of daily air pressure variation at the surface of Mars. These tides are forced by solar heating of the atmosphere and modulated by the presence of atmospheric dust, topography, and surface albedo and thermal inertia. This results in a complex mix of sun-synchronous and nonsun- synchronous tides propagating both eastward and westward around the planet in periods that are integer fractions of a solar day. The Rover Environmental Monitoring Station on board the Mars Science Laboratory has observed air pressure at a regular cadence for over 1 Mars year and here we analyze and diagnose atmospheric tides in this pressure record. The diurnal tide amplitude varies from 26 to 63 Pa with an average phase of 0424 local true solar time, while the semidiurnal tide amplitude varies from 5 to 20 Pa with an average phase of 0929. We find that both the diurnal and semidiurnal tides in Gale Crater are highly correlated to atmospheric opacity variations at a value of 0.9 and to each other at a value of 0.77, with some key exceptions occurring during regional and local dust storms. We supplement our analysis with MarsWRF general circulation modeling to examine how a local dust storm impacts the diurnal tide in its vicinity. We find that both the diurnal tide amplitude enhancement and regional coverage of notable amplitude enhancement linearly scales with the size of the local dust storm. Our results provide the first long-term record of surface pressure tides near the martian equator.

Published
2015
Full Text
View/download PDF

77. The Surface Energy Budget at Gale Crater During the First 2500 Sols of the Mars Science Laboratory Mission

Author

Martínez, G. M., primary, Vicente‐Retortillo, A., additional, Vasavada, A. R., additional, Newman, C. E., additional, Fischer, E., additional, Rennó, N. O., additional, Savijärvi, H., additional, de la Torre, M., additional, Ordóñez‐Etxeberria, I., additional, Lemmon, M. T., additional, Guzewich, S. D., additional, McConnochie, T. H., additional, Sebastián, E., additional, Hueso, R., additional, and Sánchez‐Lavega, A., additional

Published
2021
Full Text
View/download PDF

78. Near Surface Properties of Martian Regolith Derived From InSight HP3‐RAD Temperature Observations During Phobos Transits

Author

Mueller, N., primary, Piqueux, S., additional, Lemmon, M., additional, Maki, J., additional, Lorenz, R. D., additional, Grott, M., additional, Spohn, T., additional, Smrekar, S. E., additional, Knollenberg, J., additional, Hudson, T. L., additional, Krause, C., additional, Millour, E., additional, Forget, F., additional, Golombek, M., additional, Hagermann, A., additional, Attree, N., additional, Siegler, M., additional, and Banerdt, W. B., additional

Published
2021
Full Text
View/download PDF

79. Anticipated initial results from the NASA Mars 2020 Perseverance Rover Mastcam-Z multispectral, stereoscopic imaging investigation

Author

Bell, J. F., Maki, J.N., Mehall, G., Ravine, M. A., Caplinger, M. A., Saxton, K. N., Kinch, K., Madsen, M.B., Betts, Bruce H., Cisneros, E., Ehlmann, B. L., Hayes, A., Horgan, B., Jensen, E., Johnson, J.R., Paris, K., Rice, M., Winhold, M., Wolff, M.J., Bailey, A., Barrington, M.N., Cloutis, E., Cluff, N., Coates, A. J., Colaprete, A., Corlies, P, Crawford, K., Deen, R., Edgett, K., Fagents, Sarah, Grotzinger, J P, Gwinner, Klaus, Hardgrove, C., Herkenhoff, K., Jaumann, R., Lemmon, M. T., Mehall, L., Nunez, J., Paar, G., Caballo-Perucha, M., Preusker, Frank, Robinson, M. S., Rojas, C., Schmitz, Nicole, Stein, N. T., Sullivan, R., Tate, C., and Vaughan, A.

Subjects
Mastcam-Z, Mars 2020, Mars, Rover, Perseverance, Imaging
Published
2021

80. Results from InSight's First Full Martian Year

Author

Panning, M., Banerdt, B., Smrekar, S., Antonangeli, D., Asmar, Sami, Banfield, D., Beghein, C., Beucler, E., Bowles, Neil, Bozdag, E., Ceylan, S., Chi, P. J., Christensen, U., Clinton, J., Collins, G., Daubar, I., Dehant, V, Fillingim, Matthew, Folkner, W., Garcia, R., Garvin, J., Giardini, D., Golombek, M., Grant, J.A., Grott, Matthias, Grygorczuk, J., Hudson, T.L., Irving, J., Johnson, C. L., Kargl, G., Kawamura, T., Kedar, S., King, S., Knapmeyer, Martin, Knapmeyer-Endrun, B., Lemmon, M., Lognonne, P., Lorenz, R., Maki, J., Margerin, L., McLennan, S M, Michaut, C., Mimoun, D., Morgan, P., Müller, Nils, Nagihara, S., Newman, C., Nimmo, F., Pike, T., Plesa, Ana-Catalina, Rodriguez-Manfredi, J. -A., Schmerr, N., Siegler, M.A., Spiga, A., Spohn, Tilman, Stanley, S., Teanby, N., Tromp, J., Warner, N., Weber, R., Wieczorek, M., and Insight, Science Team

Subjects
Mars, InSight
Published
2021

81. Marsquake Activity Driven by the Sun?

Author

Knapmeyer, Martin, Stähler, S., Daubar, I., Forget, F., Spiga, A., Pierron, T., van Driel, M, Banfield, D., Hauber, Ernst, Grott, Matthias, Müller, Nils, Perrin, C., Jacob, A., Lucas, A., Knapmeyer-Endrun, B., Newman, C., Panning, M., Weber, R., Calef, F, Böse, Maren, Ceylan, S., Charalambous, C., Clinton, J., Giardini, D., Horleston, A., Kawamura, T., Khan, A., Lemmon, M., Lorenz, R. D., Pike, W.T., Scholz, J.-R., Lognonne, P., and Banerdt, B.

Subjects
Mars InSight Marsbeben
Published
2021

82. Seasonal seismic activity on Mars

Author

Knapmeyer, M., Stahler, S. C., Daubar, I, Forget, F., Spiga, A., Pierron, T., van Driel, M., Banfield, D., Hauber, E., Grott, M., Mueller, N., Perrin, C., Jacob, A., Lucas, A., Knapmeyer-Endrun, B., Newman, C., Panning, M. P., Weber, R. C., Calef, F. J., Bose, M., Ceylan, S., Charalambous, C., Clinton, J., Dahmen, N., Giardini, D., Horleston, A., Kawamura, T., Khan, A., Mainsant, G., Plasman, M., Lemmon, M., Lorenz, R., Pike, W. T., Scholz, J-R, Lognonne, P., Banerdt, B., Knapmeyer, M., Stahler, S. C., Daubar, I, Forget, F., Spiga, A., Pierron, T., van Driel, M., Banfield, D., Hauber, E., Grott, M., Mueller, N., Perrin, C., Jacob, A., Lucas, A., Knapmeyer-Endrun, B., Newman, C., Panning, M. P., Weber, R. C., Calef, F. J., Bose, M., Ceylan, S., Charalambous, C., Clinton, J., Dahmen, N., Giardini, D., Horleston, A., Kawamura, T., Khan, A., Mainsant, G., Plasman, M., Lemmon, M., Lorenz, R., Pike, W. T., Scholz, J-R, Lognonne, P., and Banerdt, B.

Abstract

The rate of occurrence of High Frequency (HF) marsquakes, as recorded by InSight at Homestead Hollow, Elysium Planitia, increased after about L-S= 33 degrees, and ceased almost completely by L-S= 187 degrees, following an apparently seasonal variation with a peak rate near aphelion. We define seismic rate models based on the declination of the Sun, annual solar tides, and the annual CO2 cycle as measured by atmospheric pressure. Evaluation of Akaike weights and evidence ratios shows that the declination of the Sun is the most likely, and the CO2 cycle the least likely driver of this seismic activity, although the discrimination is weak, and the occurrence of a few events in August 2020 is in favor for a triggering by CO2 ice load. We also show that no periodicity related to Phobos' orbit is present in the HF event sequence. Event rate forecasts are presented to allow further discrimination of candidate mechanisms from future observations. (C) 2021 The Author(s). Published by Elsevier B.V.

Published
2021

85. Vortex‐Dominated Aeolian Activity at InSight's Landing Site, Part 1: Multi‐Instrument Observations, Analysis, and Implications

Author

Charalambous, C., primary, McClean, J. B., additional, Baker, M., additional, Pike, W. T., additional, Golombek, M., additional, Lemmon, M., additional, Ansan, V., additional, Perrin, C., additional, Spiga, A., additional, Lorenz, R. D., additional, Banks, M. E., additional, Murdoch, N., additional, Rodriguez, S., additional, Weitz, C. M., additional, Grant, J. A., additional, Warner, N. H., additional, Garvin, J., additional, Daubar, I. J., additional, Hauber, E., additional, Stott, A. E., additional, Johnson, C. L., additional, Mittelholz, A., additional, Warren, T., additional, Navarro, S., additional, Sotomayor, L. M., additional, Maki, J., additional, Lucas, A., additional, Banfield, D., additional, Newman, C., additional, Viúdez‐Moreiras, D., additional, Pla‐García, J., additional, Lognonné, P., additional, and Banerdt, W. B., additional

Published
2021
Full Text
View/download PDF

86. Pluto’s Haze Abundance and Size Distribution from Limb Scatter Observations by MVIC

Author

Kutsop, N. W., primary, Hayes, A. G., additional, Buratti, B. J., additional, Corlies, P. M., additional, Ennico, K., additional, Fan, S., additional, Gladstone, R., additional, Helfenstein, P., additional, Hofgartner, J. D., additional, Hicks, M., additional, Lemmon, M., additional, Lunine, J. I., additional, Moore, J., additional, Olkin, C. B., additional, Parker, A. H., additional, Stern, S. A., additional, Weaver, H. A., additional, and Young, L. A., additional

Published
2021
Full Text
View/download PDF

87. Vortex‐Dominated Aeolian Activity at InSight's Landing Site, Part 2: Local Meteorology, Transport Dynamics, and Model Analysis

Author

Baker, M., primary, Newman, C., additional, Charalambous, C., additional, Golombek, M., additional, Spiga, A., additional, Banfield, D., additional, Lemmon, M., additional, Banks, M., additional, Lorenz, R., additional, Garvin, J., additional, Grant, J., additional, Lewis, K., additional, Ansan, V., additional, Warner, N., additional, Weitz, C., additional, Wilson, S., additional, and Rodriguez, S., additional

Published
2021
Full Text
View/download PDF

89. Secular Climate Change on Mars: An Update Using One Mars Year of MSL Pressure Data

Author

Haberle, R. M, Gomez-Elvira, J, de la Torre Juarez, M, Harri, A-M, Hollingsworth, J. L, Kahanpaa, H, Kahre, M. A, Lemmon, M, Martin-Torres, F. J, Mischna, M, Moores, J. E, Newman, C, Rafkin, S. C. R, Renno, N, Richardson, M. I, Rodriguez-Manfredi, J. A, Thomas, P, Vasavada, A. R, Wong, M. H, and Zorzano-Mier, M-P

Subjects
Astronomy
Abstract

The South Polar Residual Cap (SPRC) on Mars is an icy reservoir of CO2. If all the CO2 trapped in the SPRC were released to the atmosphere the mean annual global surface pressure would rise by approximately 20 Pa. Repeated MOC and HiRISE imaging of scarp retreat within the SPRC led to suggestions that the SPRC is losing mass. Estimates for the loss rate vary between 0. 5 Pa per Mars Decade to 13 Pa per Mars Decade. Assuming 80% of this loss goes directly into the atmosphere, an estimate based on some modeling (Haberle and Kahre, 2010), and that the loss is monotonic, the global annual mean surface pressure should have increased between approximately 1-20 Pa since the Viking mission (approximately 20 Mars years ago). Surface pressure measurements by the Phoenix Lander only 2.5 Mars years ago were found to be consistent with these loss rates. Last year at this meeting we compared surface pressure data from the MSL mission through sol 360 with that from Viking Lander 2 (VL-2) for the same period to determine if the trend continues. The results were ambiguous. This year we have a full Mars year of MSL data to work with. Using the Ames GCM to compensate for dynamics and environmental differences, our analysis suggests that the mean annual pressure has decreased by approximately 8 Pa since Viking. This result implies that the SPRC has gained (not lost) mass since Viking. However, the estimated uncertainties in our analysis are easily at the 10 Pa level and possibly higher. Chief among these are the hydrostatic adjustment of surface pressure from grid point elevations to actual elevations and the simulated regional environmental conditions at the lander sites. For these reasons, the most reasonable conclusion is that there is no significant difference in the size of the atmosphere between now and Viking. This implies, but does not demand, that the mass of the SPRC has not changed since Viking. Of course, year-to-year variations are possible as implied by the Phoenix data. Given that there has been no unusual behavior in the climate system as observed by a variety of spacecraft at Mars since Phoenix, its seems more likely that the Phoenix data simply did not have a long enough record to accurately determine annual mean pressure changes as Haberle and Kahre (2010) cautioned. In the absence of a strong signal in the MSL data, we conclude that if the SPRC is loosing mass it is not going into the atmosphere reservoir.

Published
2014

91. A Study of Daytime Convective Vortices and Turbulence in the Martian Planetary Boundary Layer Based on Half‐a‐Year of InSight Atmospheric Measurements and Large‐Eddy Simulations

Author

Spiga, A., primary, Murdoch, N., additional, Lorenz, R., additional, Forget, F., additional, Newman, C., additional, Rodriguez, S., additional, Pla‐Garcia, J., additional, Moreiras, D. Viúdez, additional, Banfield, D., additional, Perrin, C., additional, Mueller, N. T., additional, Lemmon, M., additional, Millour, E., additional, and Banerdt, W. B., additional

Published
2021
Full Text
View/download PDF

92. Rain, winds and haze during the Huygens probe's descent to Titan's surface

Author

Tomasko, M. G., Archinal, B., Becker, T., Bezard, B., Bushroe, M., Combes, M., Cook, D., Coustenis, A., de Bergh, C., Dafoe, L. E., Doose, L., Doute, S., Eibl, A., Engel, S., Gliem, F., Grieger, B., Holso, K., Howington-Kraus, E., Karkoschka, E., Keller, H. U., Kirk, R., Kramm, R., Kuppers, M., Lanagan, P., Lellouch, E., Lemmon, M., Lunine, J., McFarlane, E., Moores, J., Prout, G. M., Rizk, B., Rosiek, M., Rueffer, P., Schroder, S. E., Schmitt, B., See, C., Smith, P., Soderblom, L., Thomas, N., and West, R.

Subjects
Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

Author(s): M. G. Tomasko [1]; B. Archinal [2]; T. Becker [2]; B. Bézard [3]; M. Bushroe [1]; M. Combes [3]; D. Cook [2]; A. Coustenis [3]; C. de Bergh [3]; [...]

Published
2005
Full Text
View/download PDF

94. Secular Climate Change on Mars: An Update Using MSL Pressure Data

Author

Haberle, R. M, Gomez-Elvira, J, Juarez, M. de la Torre, Harri, A.-M, Hollingsworth, J. L, Kahanpaa, H, Kahre, M. A, Lemmon, M, Martin-Torres, F. J, Mischna, M, Moores, J. E, Newman, C, Rafkin, S. C. R, Renno, N, Richardson, M. I, Rodriguez-Manfredi, J. A, Thomas, P, Vasavada, A. R, Wong, M. H, and Zorzano-Mier, M.-P

Subjects
Astronomy
Abstract

The South Polar Residual Cap (SPRC) on Mars is an icy reservoir of CO2. If all the CO2 trapped in the SPRC were released to the atmosphere the mean annual global surface pressure would rise by approx. 20 Pa. Repeated MOC and HiRISE imaging of scarp retreat rates within the SPRC have led to the suggestion that the SPRC is losing mass. Estimates for the loss rate vary between 0.5 Pa per Mars Deacde to 13 Pa per Mars Decade. Assuming 80% of this loss goes directly to the atmosphere, and that the loss is monotonic, the global annual mean surface pressure should have increased between approx. 1-20 Pa since the Viking mission (19 Mars years ago).

Published
2013

95. Geophysical Observations of Phobos Transits by InSight

Author

Stähler, S. C., primary, Widmer‐Schnidrig, R., additional, Scholz, J.‐R., additional, van Driel, M., additional, Mittelholz, A., additional, Hurst, K., additional, Johnson, C. L., additional, Lemmon, M. T., additional, Lognonné, P., additional, Lorenz, R. D., additional, Müller, N. T., additional, Pou, L., additional, Spiga, A., additional, Banfield, D., additional, Ceylan, S., additional, Charalambous, C., additional, Clinton, J., additional, Giardini, D., additional, Nimmo, F., additional, Panning, M., additional, Zürn, W., additional, and Banerdt, W. B., additional

Published
2020
Full Text
View/download PDF

99. Convective vortex and dust devil predictions for Gale Crater over three Mars years and comparison with MSL‐REMS observations

Author

Newman, C. E., Kahanpää, Henrik, Richardson, M. I., Martinez, German, Vicente-Retortillo, Álvaro, Lemmon, M., Aeolis Research, Department of Electronics and Nanoengineering, University of Michigan, Ann Arbor, Space Science Institute, Aalto-yliopisto, and Aalto University

Subjects
Convective vortices, Mars atmospheric modeling, Mars, Mars Science Laboratory, Gale Crater, Dust devils
Abstract

Convective vortices and dust devils have been inferred and observed in Gale Crater, Mars, using Mars Science Laboratory (MSL) meteorological data and camera images. Rennó et al. [1998] modeled convective vortices as convective heat engines and predicted a ‘dust devil activity' (DDA) that depends only on local meteorological variables, specifically the sensible heat flux and the vertical thermodynamic efficiency which increases with the pressure thickness of the planetary boundary layer. This work uses output from the MarsWRF General Circulation Model, run with high‐resolution nests over Gale Crater, to predict DDA as a function of location, time of day, and season, and compares these predictions to the record of vortices found in MSL's Rover Environmental Monitoring Station pressure dataset. Much of the observed time of day and seasonal variation of vortex activity is captured, such as maximum (minimum) activity in southern summer (winter), peaking between 11:00 and 14:00. However, while two daily peaks are predicted around both equinoxes, only a late morning peak is observed. An increase in vortex activity is predicted as MSL climbs the northwest slopes of Aeolis Mons, as observed. This is attributed largely to increased sensible heat flux, due to (i) larger daytime surface‐to‐air temperature differences over higher terrain, enhanced by reduced thermal inertia, and (ii) the increase in drag velocity associated with faster daytime upslope winds. However, the observed increase in number of vortex pressure drops is much stronger than the predicted DDA increase, although a better match exists when a threshold DDA is used.

Published
2019

100. The HP3 Radiometer on InSight

Author

Müller, Nils, Grott, Matthias, Piqueux, S., Spohn, Tilman, Smrekar, S., Knollenberg, Jörg, Hudson, T.L., Spiga, Aymeric, Forget, F., Millour, Ehouarn, Lemmon, M. T., Maki, J., Golombek, M., and Banerdt, W.B.

Subjects
Asteroiden und Kometen, Planetenphysik, Institutsplanung / Zentrale Aufgaben PF, Mars, Messung, Oberflächentemperatur
Abstract

Introduction: The Heat Flow and Physical Properties Package (HP³) includes an infrared Radiometer attached to the deck of the InSight lander. The main objective of this part of the instrument is to con-strain the surface thermal boundary condition for the heat flow derivation by the instrumented tether de-ployed into the subsurface. The heat flow in the subsurface can be affected by seasonal and diurnal temperature variations, by radiation from the lander, its shadow, and the change in surface albedo caused by dust removal during landing and later deposition. The radiometer will observe the seasonal variation over the course of the mission. Fitting of diurnal temperature curves provides an estimate of albedo and other thermophysical properties of the near surface.

Published
2019

Catalog

Books, media, physical & digital resources
See catalog results