The NOAA Goes-12 Solar X-Ray Imager (SXI) 1. Instrument, Operations, and Data
Creators
- Hill, S. M.
- Pizzo, V. J.
- Balch, C. C.
- Biesecker, D. A.
- Bornmann, P.
- Hildner, E.
- Lewis, L. D.
- Grubb, R. N.
- Husler, M. P.
- Prendergast, K.
- Vickroy, J.
- Greer, S.
- Defoor, T.
- Wilkinson, D. C.
- Hooker, R.
- Mulligan, P.
- Chipman, E.
- Bysal, H.
- Douglas, J. P.
- Reynolds, R.
- Davis, J. M.
- Wallace, K. S.
- Russell, K.
- Freestone, K.
- Bagdigian, D.
- Page, T.
- Kerns, S.
- Hoffman, R.
- Cauffman, S. A.
- Davis, M. A.
- Studer, R.
- Berthiaume, F. E.
- Saha, T. T.
- Berthiume, G. D.
- Farthing, H.
- Zimmermann, F.
Description
The Solar X-ray Imager (SXI) was launched 23 July 2001 on NOAA's GOES-12 satellite and completed post-launch testing 20 December 2001. Beginning 22 January 2003 it has provided nearly uninterrupted, full-disk, soft X-ray solar images, with a continuous frame rate significantly exceeding that for previous similar instruments. The SXI provides images with a 1 min cadence and a single-image (adjustable) dynamic range near 100. A set of metallic thin-film filters provides temperature discrimination in the 0.6 – 6.0 nm bandpass. The spatial resolution of approximately 10 arcsec FWHM is sampled with 5 arcsec pixels. Three instrument degradations have occurred since launch, two affecting entrance filters and one affecting the detector high-voltage system. This work presents the SXI instrument, its operations, and its data processing, including the impacts of the instrument degradations. A companion paper (Pizzo et al., this issue) presents SXI performance prior to an instrument degradation that occurred on 5 November 2003 and thus applies to more than 420000 soft X-ray images of the Sun.
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