Thermal Inertia of Rocks and Rock Populations and Implications for Landing Hazards on Mars

Physics

Scientific paper

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Populations, Rocks, Thermal Emission, Mars Landing, Mars Surface, Hazards, Planetary Geology, Landing Sites, Size (Dimensions), Cameras, High Resolution

Scientific paper

Rocks represent an obvious potential hazard to a landing spacecraft. They also represent an impediment to rover travel and objects of prime scientific interest. Although Mars Orbiter Camera (MOC) images are of high enough resolution to distinguish the largest rocks (an extremely small population several meters diameter or larger), traditionally the abundance and distribution of rocks on Mars have been inferred from thermal inertia and radar measurements, our meager ground truth sampling of landing sites, and terrestrial rock populations. In this abstract, we explore the effective thermal inertia of rocks and rock populations, interpret the results in terms of abundances and populations of potentially hazardous rocks, and conclude with interpretations of rock hazards on the Martian surface and in extremely high thermal inertia areas.

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