Charge-coupled device (CCD) television camera for NASA's Galileo mission to Jupiter

Details Charge-coupled device (CCD) television camera for NASA's Galileo mission to Jupiter Charge-coupled device (CCD) television camera for NASA's Galileo mission to Jupiter

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982spie..331..376k&link_type=abstract

IN: Instrumentation in astronomy IV; Proceedings of the Fourth Conference, Tucson, AZ, March 8-10, 1982 (A83-31976 14-35). Belli

Astronomy and Astrophysics

Astronomy

1

Charge Coupled Devices, Galileo Spacecraft, Image Transducers, Jupiter Probes, Spacecraft Television, Television Cameras, Image Resolution, Integrated Circuits, Ionizing Radiation, Nasa Programs, Quantum Efficiency, Radiation Effects, Signal To Noise Ratios

Scientific paper

The 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.

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