Physics
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991esasp.328...39f&link_type=abstract
In ESA, Radars and Lidars in Earth and Planetary Sciences p 39-44 (SEE N92-25668 16-32)
Physics
Altimetry, Magellan Spacecraft (Nasa), Radio Altimeters, Topography, Venus Surface, Data Processing, High Resolution, Landforms, Magellan Project (Nasa), Synthetic Aperture Radar, Venus (Planet)
Scientific paper
During the nominal Magellan mission, the altimeter has made some 3 million measurements of the Venus surface, arranged into a set of 'footprints' covering the latitude range from 85 degrees north to 80 degrees south. Range correlation, Doppler filtering, multiburst summation, and range migration are used in order to focus the data. Maps were prepared showing the global distribution of topography, meter scale slope, and power reflection coefficient. The results are similar to those reported on previous experiments: the surface radius exhibits a unimodal distribution with more than 70 percent of the surface lying within 1 km of the mean radius, but the higher resolution of the Magellan altimeter has disclosed several surprisingly steep features, e.g., the west face of Maxwell Montes, the southern face of Danu Montes, and chasmata to the east of Thetis Regio, where average kilometer scale slopes of greater than 30 deg are not uncommon. This conclusion is corroborated by close inspection of synthetic aperture radar (SAR).
Ford Peter G.
Liu Fang
Pettengill Gordon H.
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