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

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

Mueller, N. (author): German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany

Piqueux, S. (author): Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA

Lemmon, M. (author): Space Science Institute, College Station, TX, USA

Maki, J. (author): Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA

Lorenz, R. D. (author): Johns Hopkins Applied Physics Laboratory, Laurel, MD, USA

Grott, M. (author): German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany

Spohn, T. (author): German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany; International Space Science Institute, Bern, Switzerland

Smrekar, S. E. (author): Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA

Knollenberg, J. (author): German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany

Hudson, T. L. (author): Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA

Krause, C. (author): Microgravity User Support Center, German Aerospace Center (DLR), Cologne, Germany

Millour, E. (author): Laboratoire de Météorologie Dynamique (LMD/IPSL), Sorbonne Université, Centre National de la Recherche Scientifique, École Polytechnique, École Normale Supérieure, Paris, France

Forget, F. (author): Laboratoire de Météorologie Dynamique (LMD/IPSL), Sorbonne Université, Centre National de la Recherche Scientifique, École Polytechnique, École Normale Supérieure, Paris, France

Golombek, M. (author): Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA

Hagermann, Axel (author): Luleå tekniska universitet,Rymdteknik

Attree, N. (author): Faculty of Natural Sciences, University of Stirling, Stirling, UK

Siegler, M. (author): PSI, SMU Earth Science, Dallas, TX, USA

Banerdt, W. B. (author): Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA

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John Wiley & Sons, 2021
2021
English.
In: Geophysical Research Letters. - : John Wiley & Sons. - 0094-8276 .- 1944-8007. ; 48:15

Related links:: https://doi.org/10.1...; show more...; https://urn.kb.se/re...; https://doi.org/10.1...; show less...

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We use the Martian surface temperature response to Phobos transits observed next to the InSight lander in Elysium Planitia to constrain the thermal properties of the uppermost layer of regolith. Modeled transit lightcurves validated by solar panel current measurements are used to modify the boundary conditions of a 1D heat conduction model. We test several model parameter sets, varying the thickness and thermal conductivity of the top layer to explore the range of parameters that match the observed temperature response within its uncertainty both during the eclipse as well as the full diurnal cycle. The measurements indicate a thermal inertia (TI) of in the uppermost layer of 0.2–4 mm, significantly smaller than the TI of derived from the diurnal temperature curve. This could be explained by larger particles, higher density, or some or slightly higher amount of cementation in the lower layers.

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By the author/editor: Mueller, N.; Piqueux, S.; Lemmon, M.; Maki, J.; Lorenz, R. D.; Grott, M.; show more...; Spohn, T.; Smrekar, S. E.; Knollenberg, J.; Hudson, T. L.; Krause, C.; Millour, E.; Forget, F.; Golombek, M.; Hagermann, Axel; Attree, N.; Siegler, M.; Banerdt, W. B.; show less...

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By the university: Luleå University of Technology

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

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