Using single-cycle Magellan radar imagery to constrain heights and slope angles of Venusian geologic features

Details Using single-cycle Magellan radar imagery to constrain heights and slope angles of Venusian geologic features Using single-cycle Magellan radar imagery to constrain heights and slope angles of Venusian geologic features

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28.1561w&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 561.

Mathematics

Logic

1

Venus Surface, Planetary Geology, Magellan Spacecraft (Nasa), Radar Imagery, Terrain Analysis, Relief Maps, Slopes, Doppler Radar, Surface Roughness

Scientific paper

The 3D geometry (planform and vertical components) of many geologic surface features on Venus constrains interpretations of their structural style and origin. Radar images returned via the Magellan mission provide representations of the planform, or horizontal geometry, albeit with possible imaging and processing artifacts or distortions, of nearly 98 percent of the Venusian surface. Horizontal resolution (100-250 m at full resolution) is sufficient to resolve the planform characteristics of many individual features, e.g., faults, folds, craters, and volcanic edifices. However, determining their vertical relief proves more difficult. The large 'footprint' of the Magellan altimeter instrument, and thus the comparatively low resolution of the altimetry data (several km), disallows accurate vertical relief determinations for most individual structures. Radargrammetric calculations, however, by measuring planform distortions provide an alternate approach for determining vertical relief, and therefore heights, depths, and slope angles. This paper provides methodology for using single radar images to determine relief of several types of geologic features.

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