Interpretation of planetary radar observations - The relationship between actual and inferred slope distributions

Details Interpretation of planetary radar observations - The relationship between actual and inferred slope distributions Interpretation of planetary radar observations - The relationship between actual and inferred slope distributions

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.1173m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. E1, p. 1173-1184.

Physics

12

Planetary Surfaces, Radar Tracking, Slopes, Surface Roughness, Photogrammetry, Radar Cross Sections, Satellite-Borne Instruments, Space Observations (From Earth), Planets, Remote Sensing, Radar Methods, Surface, Comparions, Scattering, Slope, Distribution, Models, Roughness, Analysis, Earth, Plains, Dunes, Terrestrial Planets, Theoretical Studies, Terrain, Basins, Lava Flow, Cinder Cones, Analogs

Scientific paper

We examined the distribution of surface slopes of a variety of terrestrial surfaces by field measurement, representing surfaces formed by a wide range of processes, and compared the results to planetary radar data. Slope distributions of the measured surfaces differed considerably from the distributions assumed by accepted models of radar scattering. We also used Hagfors' model of radar scattering to predict the return that would be expected from surfaces where two discrete surface types were present within the radar field of view and found that the shapes of the resulting slope distributions differed from those predicted by the Hagfors model for homogeneous surfaces. Together, these results suggest that current methods of determining surface roughness from radar may significantly underestimate the roughness of planetary surfaces and that the derived rms slope can best be used as a qualitative guide to the physical interpretation of actual surface properties.

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