Computer Science – Performance
Scientific paper
Jan 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jats...34..205l&link_type=abstract
(American Astronomical Society, Planetary Science Meeting, Austin, Tex., Mar. 31-Apr. 4, 1976.) Journal of the Atmospheric Scien
Computer Science
Performance
5
Mariner 10 Space Probe, Normalizing, Spaceborne Photography, Ultraviolet Photography, Venus Atmosphere, Venus Clouds, Albedo, Atmospheric Scattering, Chandrasekhar Equation, Polar Caps, Satellite Observation, Vidicons
Scientific paper
A few Mariner 10 images of Venus have been 'normalized' to a standard scattering geometry using the exact solution by Chandrasekhar (1950) involving his H functions. The most striking feature of the normalized images is the bright polar ring or cap beyond about 50 deg latitude circle and a narrower brightness frequency distribution. The brightness variation along a meridian shows substantial axial symmetry on a large scale, and small-scale brightness variations over the planet are no more than about 10%. Inferences regarding the polar cloud tops in light of available evidence are discussed. The variation of mean brightness and of the ratio of mean square deviation of brightness to average brightness is comparable to the performance limits of the vidicon camera for the image sequence lasting about a day, so that the variation in distribution of dark and bright features over the planet and the UV albedo of the planet over about a day is small.
Limaye Sanjay S.
Suomi Verner
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