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Proceedings Paper

Photopolarimeter/Radiometer Instrument For The Project Galileo Jupiter Orbiter
Author(s): L. A. Watts; E. E. Russell; S. F. Pellicori
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Paper Abstract

A multi-mode space flight instrument capable of remotely measuring the parameters necessary to construct a three-dimensional dynamic model of a planetary atmosphere is presented. This Photopolarimeter/ Radiometer (PPR) instrument was designed to make such measurements aboard the NASA Project Galileo spacecraft while orbiting the planet Jupiter. The PPR will use photopolarimetric techniques to determine the nature of atmospheric particles and aerosols, photometric techniques to trace the temporal properties of specific gas species, and radiometric techniques to assess the thermal and radiative energy balance of the planet and its prominent satellites. Special features of the PPR, including simultaneous measurement of polarization components to accommodate changing scene conditions and redundant internal calibration schemes for long-term accuracy and stability are emphasized. Construction techniques including lightweight metallic optics, a special magnetically-clean motor, and microprocessor control of measurement sequences are discussed. The design, basic operation, and key functional elements of the compact low-power radiation-resistant PPR instrument are summarized.

Paper Details

Date Published: 3 May 1979
PDF: 8 pages
Proc. SPIE 0172, Instrumentation in Astronomy III, (3 May 1979); doi: 10.1117/12.957098
Show Author Affiliations
L. A. Watts, Santa Barbara Research Center (United States)
E. E. Russell, Santa Barbara Research Center (United States)
S. F. Pellicori, Santa Barbara Research Center (United States)

Published in SPIE Proceedings Vol. 0172:
Instrumentation in Astronomy III
David L. Crawford, Editor(s)

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