Geology and radiophysical properties of the Venera and Vega landing sites

Geologic maps for all seven Venera and Vega landing sites have been produced. Because the radius of error for each landing site is 150 km, the entire landing circle has been mapped centered about the estimated landing point. Correlations were found between the Magellan imagery and the lander TV panoramas and geochemical measurements made at the landing site. Radiophysical properties, including backscatter cross-sections, altimetry, emissivity, and rms slopes, were determined for each landing circle. After mapping the geology of the landing circles, the regional geology of the seven sites was mapped and the geologic history of theses large regions was determined.