Global radar units on Venus derived from statistical analysis of Pioneer Venus Orbiter radar data

Details Global radar units on Venus derived from statistical analysis of Pioneer Venus Orbiter radar data Global radar units on Venus derived from statistical analysis of Pioneer Venus Orbiter radar data

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.4979d&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, April 10, 1986, p. 4979-4992.

Physics

6

Cluster Analysis, Planetary Geology, Venus Orbiting Imaging Radar (Spacecraft), Venus Surface, Classifications, Landing Sites, Pioneer Venus 1 Spacecraft, Radar Data, Statistical Analysis, Venus Atmosphere, Venus, Pioneer Venus Orbiter, Pvo, Radar Methods, Analysis, Reflectivity, Classification, Hypsometry, Highlands, Mountains, Lowlands, Composition, Plains, Comparisons, Spacecraft Observations, Surface, Geology, Altitude, Venera Spacecraft, Landers, Earth-Based Observations, Morphology, Terrain

Scientific paper

The classification of surface radar units on Venus using an unsupervised cluster analysis of Pioneer Venus radar reflectivity and root-mean-square (rms)-slope data is described. The advantages of the unsupervised analysis are discussed. F tests are utilized to evaluate the numerical significance of the clusters. The derived rms-slope data and reflectivity for 15 radar units are presented. The relations between radar data bases and elevation are studied. The lowlands, rolling plains, highlands, and mountainous surface of Venus are examined. The geology of Venus landing sites and radar properties, and the surface radar reflectivity images and earth-based images are compared. The spatial relations between classification units are calculated. It is concluded that the unsupervised analysis data correlate well with Head et al. (1985b) data and produce more detailed classification images.

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