Three-step nonuniformity correction for a highly dynamic intensified charge-coupled device star sensor |
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| Authors: | Yan Jin Jie Jiang Guangjun Zhang |
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| Institution: | 1. Department of Applied Physics and Applied Mathematics, Columbia University, 2880 Broadway, New York, NY 10025, USA;2. NASA Goddard Institute for Space Studies, 2880 Broadway, New York, NY 10025, USA;3. Fakultät für Physik, Meteorologisches Institut, Ludwig-Maximilians-Universität, Theresienstrasse 37, 80333 München, Germany;4. Department of Electrical Engineering/NOAA CREST, The City College of New York, 160 Convent Ave, New York, NY 10031, USA;5. Trinnovim, LLC, 2880 Broadway, New York, NY 10025, USA |
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| Abstract: | A three-step nonuniformity correction algorithm based on the photoelectrical response models of intensified charge-coupled device (ICCD) for a highly dynamic ICCD star sensor is proposed in the current paper. The influence factors of nonuniformity correction precision are analyzed based on the photoelectrical imaging theory. The photoelectrical response models of ICCD are obtained using the experimental method, and the nonuniformity correction is implemented in three steps based on the photoelectrical response models. The nonuniformity correction results in constant-radiance images and sky images of the highly dynamic star sensor show that the proposed algorithm has satisfactory correction precision, and the accuracy of the highly dynamic star sensor can be enhanced effectively when sky images are processed using the three-step nonuniformity correction algorithm. |
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