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Proceedings Paper

Imaging And Polarimetry With The Pioneer Venus Orbiter Cloud Photopolarimeter
Author(s): Larry D. Travis
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Paper Abstract

The Orbiter Cloud Photopolarimeter (OCPP) onboard the Pioneer Venus Orbiter spacecraft serves both as a spin-scan imaging system providing 30-km resolution images of the ultraviolet (365 nm) cloud features and as a polarimeter yielding low resolution maps in the four spectral bands: 270, 365, 550 and 935 nm. Early images show numerous cloud features and apparent circulation patterns similar to those observed by Mariner 10 in 1974. The polar regions exhibit pronounced brightening, with the polar "ring" features located between 45° and 65° latitude usually having the highest intensity values in each hemisphere. Polarimetry measurements indicate that the main visible cloud layer of 1-μm radius sulfuric acid droplets is covered at least in the morning terminator region with a thin haze layer composed of submicron size particles. The performance of the OCPP to date has been excellent.

Paper Details

Date Published: 27 September 1979
PDF: 6 pages
Proc. SPIE 0183, Space Optics II, (27 September 1979); doi: 10.1117/12.957426
Show Author Affiliations
Larry D. Travis, NASA Goddard Institute for Space Studies (United States)

Published in SPIE Proceedings Vol. 0183:
Space Optics II
Charles L. Wyman, Editor(s)

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