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Charge-coupled device (CCD) television camera for NASA's Galileo mission to JupiterThe CCD detector under construction for use in the slow-scan television camera for the NASA Galileo Jupiter orbiter to be launched in 1985 is presented. The science objectives and the design constraints imposed by the earth telemetry link, platform residual motion, and the Jovian radiation environment are discussed. Camera optics are inherited from Voyager; filter wavelengths are chosen to enable discrimination of Galilean-satellite surface chemical composition. The CCO design, an 800 by 800-element 'virtual-phase' solid-state silicon image-sensor array with supporting electronics, is described with detailed discussion of the thermally generated dark current, quantum efficiency, signal-to-noise ratio, and resolution. Tests of the effect of ionizing radiation were performed and are analyzed statistically. An imaging mode using a 2-1/3-sec frame time and on-chip summation of the signal in 2 x 2 blocks of adjacent pixels is designed to limit the effects of the most extreme Jovian radiation. Smearing due to spacecraft/target relative velocity and platform instability will be corrected for via an algorithm maximizing spacial resolution at a given signal-to-noise level. The camera is expected to produce 40,000 images of Jupiter and its satellites during the 20-month mission.
Document ID
19830050806
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Klaasen, K. P.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Clary, M. C.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Janesick, J. R.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1982
Subject Category
Spacecraft Instrumentation
Meeting Information
Meeting: Instrumentation in astronomy IV; Fourth Conference
Location: Tucson, AZ
Start Date: March 8, 1982
End Date: March 10, 1982
Accession Number
83A32024
Distribution Limits
Public
Copyright
Other

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