Photopolarimeter/Radiometer Instrument For The Project Galileo Jupiter Orbiter

L. A. Watts; E. E. Russell; S. F. Pellicori

doi:10.1117/12.957098

3 May 1979 Photopolarimeter/Radiometer Instrument For The Project Galileo Jupiter Orbiter

L. A. Watts, E. E. Russell, S. F. Pellicori

Proceedings Volume 0172, Instrumentation in Astronomy III; (1979) https://doi.org/10.1117/12.957098
Event: Instrumentation in Astronomy, 1979, Tucson, United States

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.

Citation Download Citation

L. A. Watts, E. E. Russell, and S. F. Pellicori "Photopolarimeter/Radiometer Instrument For The Project Galileo Jupiter Orbiter", Proc. SPIE 0172, Instrumentation in Astronomy III, (3 May 1979); https://doi.org/10.1117/12.957098

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