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Proceedings Paper

Astrometric sky testing results for the TIS 5-micron 3T-class CMOS detector
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Paper Abstract

CMOS-based focal planes have many potential advantages over CCDs for use in space for star mapping/star tracking applications. These include more flexible readout circuitry and improved radiation tolerance. There are also weaknesses, including noise performance, quantum efficiency, and potential systematics introduced by the presence of circuitry on the photosensitive side of the detector. In this paper, we measure the effects of these sources of error on centroiding and photometry for the HDTV (1k x 2k) SI-1920HD camera by observing stellar reference fields using USNO's 8-inch Twin Astrograph telescope in Flagstaff, AZ. This camera serves as an archetype for the entire family of related TIS detectors, including the 3k x 4k V12M and the 7.6k x 7.6k V59M. We determine an upper limit for the astrometric centroiding performance for this class of detector to be ~1/30th of a pixel. There are indications that better performance may be possible if improvements are made to the temperature control system used for this first set of observations.

Paper Details

Date Published: 17 September 2007
PDF: 8 pages
Proc. SPIE 6690, Focal Plane Arrays for Space Telescopes III, 66900J (17 September 2007); doi: 10.1117/12.734065
Show Author Affiliations
Bryan N. Dorland, U.S. Naval Observatory (United States)
Greg S. Hennessy, U.S. Naval Observatory (United States)
Norbert Zacharias, U.S. Naval Observatory (United States)
Chris Rollins, Research Support Instruments (United States)
David Huber, Research Support Instruments (United States)
Robert Kessel, Naval Research Laboratory (United States)

Published in SPIE Proceedings Vol. 6690:
Focal Plane Arrays for Space Telescopes III
Thomas J. Grycewicz; Cheryl J. Marshall; Penny G. Warren, Editor(s)

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