Mathematics – Logic
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pggp.rept..483b&link_type=abstract
In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1990 p 483-488 (SEE N92-10728 01-91)
Mathematics
Logic
Geological Surveys, Mosaics, Planetary Geology, Planetary Mapping, Radar Imagery, Radar Maps, Venus (Planet), Venus Surface, Coordinates, Geodesy, Mercator Projection, Stereophotography, Topography
Scientific paper
Semicontrolled image mosaics of Venus, based on Magellan data, are being compiled at 1:50,000,000, 1:10,000,000, 1:5,000,000, and 1:1,000,000 scales to support the Magellan Radar Investigator (RADIG) team. The mosaics are semicontrolled in the sense that data gaps were not filled and significant cosmetic inconsistencies exist. Contours are based on preliminary radar altimetry data that is subjected to revision and improvement. Final maps to support geologic mapping and other scientific investigations, to be compiled as the dataset becomes complete, will be sponsored by the Planetary Geology and Geophysics Program and/or the Venus Data Analysis Program. All maps, both semicontrolled and final, will be published as I-maps by the United States Geological Survey. All of the mapping is based on existing knowledge of the spacecraft orbit; photogrammetric triangulation, a traditional basis for geodetic control on planets where framing cameras were used, is not feasible with the radar images of Venus, although an eventual shift of coordinate system to a revised spin-axis location is anticipated. This is expected to be small enough that it will affect only large-scale maps.
Batson Raymond M.
Morgan H. F.
Sucharski Robert
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