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. 2020 Aug 7;125(8):e2020JE006502. doi: 10.1029/2020JE006502

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©2020. The Authors.

This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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The cumulative fractional area covered by all rocks (0–40%) from the fit of rocks between 1.5 and 2.25 m diameter (or rock abundance) in HiRISE images to the exponential model in 150 m tiles for the InSight landing ellipse. Rock abundance is concentrated around sparse rocky ejecta craters with most smooth terrain having zero rock abundance. The average cumulative fractional area covered by rocks of these 150 m tiles is 1.2%. Note that InSight landed (white X) in a rocky portion of the ellipse. Rock measurements are from Golombek et al. (2017). Background is the THEMIS daytime mosaic in which dark halo craters have higher thermal inertia from rocky ejecta.