Skip to Main content Skip to Navigation
Journal articles

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

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.
Complete list of metadata

Cited literature [207 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01901608
Contributor : Open Archive Toulouse Archive Ouverte (oatao) <>
Submitted on : Tuesday, October 23, 2018 - 9:43:22 AM
Last modification on : Wednesday, June 30, 2021 - 9:40:13 PM
Long-term archiving on: : Thursday, January 24, 2019 - 12:52:23 PM

File

Morgan_20943.pdf
Files produced by the author(s)

Identifiers

Citation

Paul Morgan, Matthias Grott, Brigitte Knapmeyer-Endrun, Matt Golombek, Pierre Delage, et al.. A Pre-Landing Assessment of Regolith Properties at the InSight Landing Site. Space Science Reviews, Springer Verlag, 2018, 214 (6), pp.104. ⟨10.1007/s11214-018-0537-y⟩. ⟨hal-01901608⟩

Share

Metrics

Record views

446

Files downloads

1824