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Proceedings Paper

Near-Infrared Mapping Spectrometer For Investigation Of Jupiter And Its Satellites
Author(s): Irving M. Aptaker
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Paper Abstract

The Near-Infrared Mapping Spectrometer (NIMS) is one of the science instruments in the Galileo Mission, which will explore Jupiter and its satellites in the late-1980's. The NIMS experiment will map geological units on the surfaces of the Jovian satellites, characterize their mineral content; and for the atmosphere of Jupiter, investigate cloud properties and the spatial and temporal variability of molecular abundances. All the optics are gold-coated reflective and consist of a telescope and a grating spectrometer. The balance of the instrument includes a 17-detector (silicon and indium antimonide) focal plane array, a tuning fork chopper, microprocessor-controlled electronics, and a passive radiative cooler. A wobbling secondary mirror in the telescope provides 20 pixels in one dimension of spatial scanning in a pushbroom mode, with 0.5 mr x 0.5 mr instantaneous field of view. The spectral range is 0.7 - 5.2μ; resolution is 0.025μ. NIMS is the first infrared experiment to combine both spatial and spectral mapping capability in one instrument.

Paper Details

Date Published: 16 November 1982
PDF: 15 pages
Proc. SPIE 0331, Instrumentation in Astronomy IV, (16 November 1982); doi: 10.1117/12.933455
Show Author Affiliations
Irving M. Aptaker, California Institute of Technology (United States)

Published in SPIE Proceedings Vol. 0331:
Instrumentation in Astronomy IV
David L. Crawford, Editor(s)

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