Computer Science – Sound
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984lpico.526...16g&link_type=abstract
Press Abstracts from the Fifteenth Lunar and Planetary Science Conference, held March 12 -16, 1984, in Houston, TX. LPI Contribu
Computer Science
Sound
Geochemistry, Pioneer Space Probes, Planetary Geology, Radar Geology, Topography, Venus Surface, Cluster Analysis, Planetary Composition, Porous Materials, Radar Echoes, Venera Satellites
Scientific paper
The radar altimetry, roughness (RMS slopes), and reflectivity data acquired for Venus represent the only global radar information available for any of the planets. In addition, the Pioneer Venus radar instrument was able to sound the surface at normal incidence so that it was possible to accurately measure the small-scale surface slopes and reflectivity (dielectric and porosity properties) at the same time as the surface elevation. Analyses of the topography of Venus demonstrate that it differs in its distribution from the Moon, Mars, or the Earth. While the range of topography extends from -2.5 km below the reference level to 11.5 km above, most of Venus falls within 1 km of the mean elevation, this is in sharp contrast to the Earth. The narrow, unimodal nature of the distribution of topography on Venus evidently exerts control on the other radar-derived properties of the surface. When clustering analysis techniques are applied to the Venus radar data sets, the result demonstrates that topographic zones serve as the best criteria for distinguishing regions on Venus which have related radar properties. The individual radar data sets are investigated separately and in conjunction with topography.
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