17 September 2007 Astrometric sky testing results for the TIS 5-micron 3T-class CMOS detector
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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.
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Bryan N. Dorland, Bryan N. Dorland, Greg S. Hennessy, Greg S. Hennessy, Norbert Zacharias, Norbert Zacharias, Chris Rollins, Chris Rollins, David Huber, David Huber, Robert Kessel, Robert Kessel, } "Astrometric sky testing results for the TIS 5-micron 3T-class CMOS detector", Proc. SPIE 6690, Focal Plane Arrays for Space Telescopes III, 66900J (17 September 2007); doi: 10.1117/12.734065; https://doi.org/10.1117/12.734065

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