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12 July 2019 Modelization, measurement and correction of a cross-talk image ghost in the Ingenio/SEOSAT payload
C. Miravet, C. Santos, D. Zorita, D. Gil-Leyva, I. Cabeza, A. Marini, F. Reina, V. Kirschner, A. Popescu
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Proceedings Volume 11180, International Conference on Space Optics — ICSO 2018; 111802J (2019) https://doi.org/10.1117/12.2536010
Event: International Conference on Space Optics - ICSO 2018, 2018, Chania, Greece
Abstract
Ingenio/SEOSAT is a high-spatial-resolution optical mission developed under the Spanish Earth Observation National Program for Satellites (PNOTS), and managed technically in the framework of an ESA contract. It features as Primary Payload (PP) a high-resolution optical payload with one 2.5 meter resolution panchromatic channel and four 10 meter resolution visible/near infrared spectral channels. It is based on a twin Korsch telescope concept, each telescope covering half of the instrument’s swath width. In this communication is presented a detailed account of the work performed to accurately characterize and correct by post-processing an image ghost present in the multi-spectral channels of the primary payload. The work reported here includes the description and analysis of the results of three test campaigns, performed at Thales Alenia Space. Tests carried out include radiometric tests at focal plane level, generic stray-light tests and a novel test to characterize specifically the parameters of the studied cross-talk image ghost. Field-dependent point spread functions for the studied image ghost have been generated by optical analysis, and have been adjusted with the results of the performed tests. From these, image filters have been devised to reproduce, and remove by subtraction, the image ghost. Quantitative image ghost correction results on an actual test image are shown.
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C. Miravet, C. Santos, D. Zorita, D. Gil-Leyva, I. Cabeza, A. Marini, F. Reina, V. Kirschner, and A. Popescu "Modelization, measurement and correction of a cross-talk image ghost in the Ingenio/SEOSAT payload", Proc. SPIE 11180, International Conference on Space Optics — ICSO 2018, 111802J (12 July 2019); https://doi.org/10.1117/12.2536010
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KEYWORDS
Sensors
Cameras
Near infrared
Optical filters
Charge-coupled devices
Telescopes
Reflection
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