OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

A Pre-Landing Assessment of Regolith Properties at the InSight Landing Site

Morgan, Paul and Grott, Matthias and Knapmeyer-Endrun, Brigitte and Golombek, Matthew P. and Delage, Pierre and Lognonné, Philippe and Piqueux, Sylvain and Daubar, Ingrid and Murdoch, Naomi and Charalambous, Constantinos and Pike, William T. and Müller, Nils and Hagermann, Axel and Siegler, Matt and Lichtenheldt, Roy and Teanby, Nick and Kedar, Sharon A Pre-Landing Assessment of Regolith Properties at the InSight Landing Site. (2018) Space Science Reviews, 214 (6). 1-47. ISSN 0038-6308

[img]
Preview
(Document in English)

PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
2MB

Official URL: https://doi.org/10.1007/s11214-018-0537-y

Abstract

This article discusses relevant physical properties of the regolith at the Mars InSight landing site as understood prior to landing of the spacecraft. InSight will land in the northern lowland plains of Mars, close to the equator, where the regolith is estimated to be ≥3--5 m thick. These investigations of physical properties have relied on data collected from Mars orbital measurements, previously collected lander and rover data, results of studies of data and samples from Apollo lunar missions, laboratory measurements on regolith simulants, and theoretical studies. The investigations include changes in properties with depth and temperature. Mechanical properties investigated include density, grain-size distribution, cohesion, and angle of internal friction. Thermophysical properties include thermal inertia, surface emissivity and albedo, thermal conductivity and diffusivity, and specific heat. Regolith elastic properties not only include parameters that control seismic wave velocities in the immediate vicinity of the Insight lander but also coupling of the lander and other potential noise sources to the InSight broadband seismometer. The related properties include Poisson’s ratio, P- and S-wave velocities, Young’s modulus, and seismic attenuation. Finally, mass diffusivity was investigated to estimate gas movements in the regolith driven by atmospheric pressure changes. Physical properties presented here are all to some degree speculative. However, they form a basis for interpretation of the early data to be returned from the InSight mission.

Item Type:Article
HAL Id:hal-01901608
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Laboratory name:
Statistics:download
Deposited By: Naomi Murdoch
Deposited On:23 Oct 2018 07:42

Repository Staff Only: item control page