The NOAA Goes-12 Solar X-Ray Imager (SXI) 2. Performance |
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| Authors: | V J Pizzo S M Hill C C Balch D A Biesecker P Bornmann E Hildner R N Grubb E G Chipman J M Davis K S Wallace K Russell S A Cauffman T T Saha G D Berthiume |
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| Institution: | (1) NOAA Space Environment Center, 325 Broadway, Boulder, CO, 80305, U.S.A.;(2) NOAA NESDIS/SOCC, Suitland, MD, 20746, U.S.A.;(3) NASA Marshall Space Flight Center, Huntsville, AL, 35812, U.S.A.;(4) NASA Goddard Space Flight Center, Greenbelt, MD, 20771, U.S.A.;(5) MIT Lincoln Laboratories, Lexington, MA, 02420, U.S.A.;(6) Present address: Ball Aerospace & Technologies Corp., 1600 Commerce Street, Boulder, CO, 80306-1062, U.S.A. |
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| Abstract: | The Solar X-ray Imager (SXI) was launched on 23 July 2001 on NOAA s GOES-12 satellite and completed post-launch testing on 20 December 2001. It was brought into operations on 21 January 2003. This paper documents SXI performance and calibrations prior to an instrument degradation that occurred on 5 November 2003 and thus covers more than 420000 soft X-ray images of the Sun. This paper details component-level as well as full-system calibrations characterizing the spatial and spectral performance of the instrument, including the grazing-incidence mirror, filters, and the properties of the MCP-intensified CCD detector system. Routine image corrections are also described. These include background (dark current) subtraction, flat-fielding, off-band light-leak correction, and image pointing and timing considerations. In addition, a signal-to-noise analysis is presented. The information contained in this study is intended to enable researchers to conduct quantitative analysis of GOES-12 SXI images. |
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