28 February 2017 Influence analysis of satellite drift angle on spectrum recovery precision of large aperture static interferometer spectrometer
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Proceedings Volume 10256, Second International Conference on Photonics and Optical Engineering; 102560W (2017) https://doi.org/10.1117/12.2256460
Event: Second International Conference on Photonics and Optical Engineering, 2016, Xi'an, China
Abstract
Large aperture static interferometer spectrometer (LASIS) use the method of push-boom to get the geometric and spectral characteristics of ground target, the particularity of principle requires the movement of satellite must be in the same direction with spectrometers detectors. Drift angle of satellite leading to abnormal image shifts in the column direction which should be perpendicular to the detector and can seriously affect the spectrum recovery precision of collected data. This paper analyzes the influence mechanism of drift angle for spectrum recovery precision. Simulation based on the actual on-orbit data analyses the effects of different drift angle of relative mean deviation and relative secondary deviation rehabilitation of the spectrum, besides the influence of spectral angle similarity. These studies have shown that, when the lateral deviation due to the drift angle on the across track is less than 0.3 pixel, the effect for the relative mean deviation of the inversive spectra will be no more than 7%. when the lateral deviation due to the drift angle on the across track is larger than one pixel, even though the resampling correction is proceeded, the restored spectral data cube still shows an relative mean error more than 10%, which seriously affect the availability of spectral data.
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Siyuan Li, Siyuan Li, Huan Liu, Huan Liu, Geng Zhang, Geng Zhang, Zhoufeng Zhang, Zhoufeng Zhang, Qiang Zhao, Qiang Zhao, } "Influence analysis of satellite drift angle on spectrum recovery precision of large aperture static interferometer spectrometer", Proc. SPIE 10256, Second International Conference on Photonics and Optical Engineering, 102560W (28 February 2017); doi: 10.1117/12.2256460; https://doi.org/10.1117/12.2256460
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