Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977icar...32..147s&link_type=abstract
Icarus, vol. 32, Oct. 1977, p. 147-167.
Astronomy and Astrophysics
Astronomy
2
Mars Surface, Radar Astronomy, Surface Properties, Permittivity, Photogeology, Planetary Mapping, Surface Roughness, Wavelengths
Scientific paper
In the present paper, the results are summarized of a study aimed at determining the small-scale surface properties of Mars (for the Viking project) from a thorough review of all available Martian radar data for the 1973 opposition. Analysis of the quasi-specular echo component showed changes in apparent reflectivity of at least 5 to 1. If attributed entirely to variations in surface material, these correspond to dielectric constants between 1.6 and 4.0. Values of rms surface slope on 1- to 100-m scales range from as low as 0.5 degrees in tablelands near Valles Marineris to more than 3.0 degrees in certain other areas. There is a weak correlation between the small-scale surface characteristics inferred from radar and those inferred from Mariner 9 images and other remote-sensing data sets.
Lipa B. J.
Simpson Richard A.
Tyler Leonard G.
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