Mathematics – Probability
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....8910385s&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 89, Nov. 10, 1984, p. 10385-10404.
Mathematics
Probability
13
Mars Surface, Multistatic Radar, Radar Imagery, Viking Orbiter Spacecraft, Craters, Equatorial Regions, Ground Tracks, Probability Density Functions, Surface Roughness, Terrain Analysis
Scientific paper
Viking bistatic radar have been processed using Hagfors' scattering function to obtain estimates of rms surface roughness from ground tracks primarily in the equatorial region of Mars. Roughness varies from as little as 0.75 deg rms east of Solis and Sinai Plana to at least 8 deg on the western slope of Arsia Mons. Estimated roughness in cratered terrain is generally about 5 deg or less, implying the existence of smoothing processes on scales less than 100 m. There is good agreement between bistatic roughness estimates and earth-based results at ground track intersections near the equator in both cratered terrain and plains. Surface tilt probability density functions derived from these observations are usually more sharply peaked than the Hagfors function for similar values of rms surface roughness. Earlier results using the Gaussian model appear to have overestimated the surface roughness by 30-40 percent.
Schaber Gerald G.
Simpson Richard A.
Tyler Leonard G.
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