Surface characteristics of Venus derived from Pioneer Venus altimetry, roughness, and reflectivity measurements

Details Surface characteristics of Venus derived from Pioneer Venus altimetry, roughness, and reflectivity measurements Surface characteristics of Venus derived from Pioneer Venus altimetry, roughness, and reflectivity measurements

Jul 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.6873h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, July 10, 1985, p. 6873-6885.

Mathematics

Logic

47

Pioneer Space Probes, Radar Geology, Radar Maps, Surface Roughness, Venus Radar Echoes, Dielectrics, Lava, Reflectance, Regolith, Tectonics, Topography, Venera Satellites, Venus, Surface, Characterisitics, Pioneer Venus, Altimetry, Roughness, Reflectivity, Radar Methods, Orbiter, Geology, Texture, Dialectrics, Pvo, Abundance, Distribution, Origin, Deformation, Formation, Soil, Lava, Flows, Hypotheses, Enrichment, Tectonism, Geochemistry

Scientific paper

The three primary data sets for the Pioneer Venus orbiter radar experiment (topography, roughness, and reflectivity) contain important information about the geological and textural characteristics of the surface of Venus. The authors have subdivided the range of roughness and reflectivity values into three categories as follows: roughness, in degrees rms slope: relatively smooth (1° - 2.5°), transitional from smooth to rough (2.5° - 5°), and relatively rough (>5°); and Fresnel reflectivity: surface dominated by soil or porous material (<0.1), surfaces dominated by rock material (0.1 - 0.2), and surfaces with a significant percentage of anomalously high dielectric material (>0.2). The authors have analyzed each of these data sets and their relationships to each other in order to define areas of the surface that are characterized by distinctive properties (e.g., rough rocky surfaces, smooth soil surfaces). They then describe the abundance and areal distribution of such areas and locally calibrate the geological significance of some of the surface types by examining high-resolution images from spacecraft and earth-based observatories.

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