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Optical Engineering

Operations and calibration of the solid-state imaging system during the Galileo extended mission at Jupiter
Author(s): Kenneth P. Klaasen; H. Herbert Breneman; Amy Simon-Miller; Donald J. Banfield; Greg C. Levanas
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Paper Abstract

×The solid state imaging (SSI) subsystem on the National Aeronautics and Space Administration's (NASA's) Galileo spacecraft has successfully completed a 4-yr extended mission exploring the Jovian system. The SSI remained in stable calibration throughout its total 12-yr flight time and returned valuable scientific data until the end of the mission. A slight loss in spatial resolution occurred between the last primary-mission calibration and that done during the extended mission. The absolute spectral radiometric calibration has been determined to 5 to 7% accuracy across the camera's eight spectral filters. A possible shift in the central wavelength of one of the methane-absorption-band filters of ~3 nm shortward may have occurred late in the extended mission. The charge-coupled device (CCD) detector endured the harsh radiation environment at Jupiter to a total dose of ~4 krad without any serious permanent damage. Some radiation-induced problems in the detector clocking and signal-chain electronics rendered the 2-×2-pixel summation modes unusable and required that the CCD light flood and erasure prior to each exposure be disabled. However, good-quality imaging continued to be possible even in the most extreme radiation fluxes encountered. The successful return of 1453 images during the extended mission nearly matched the number of frames returned during the primary mission.

Paper Details

Date Published: 1 February 2003
PDF: 16 pages
Opt. Eng. 42(2) doi: 10.1117/1.1534590
Published in: Optical Engineering Volume 42, Issue 2
Show Author Affiliations
Kenneth P. Klaasen, Jet Propulsion Lab. (United States)
H. Herbert Breneman, Jet Propulsion Lab. (United States)
Amy Simon-Miller, NASA Goddard Space Flight Ctr. (United States)
Donald J. Banfield, Cornell Univ. (United States)
Greg C. Levanas, Jet Propulsion Lab. (United States)

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