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Analyzing the misregistration of the pushbroom Offner hyperspectral imaging spectrometer caused by FOV separation and motion compensation design
Author(s): Dongxing Tao; Jing Wang; Chao Zhang; Yanqiang Bi; Yonghong Shang; Yifei Pei; Jingchuan Zhang; Guorui Jia
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Paper Abstract

FOV separation (between VNIR sensor and SWIR sensor) and motion compensation imaging modes are introduced into the pushbroom imaging spectrometer to increase the SNR of the imaging data sometimes. Besides the higher SNR, the two imaging modes result in some bad effects on the imaging data, such as the additional misregistration. In the paper, a digital simulator for pushbroom Offner hyperspectral imaging spectrometer is used to analyze the misregistration caused by the FOV separation and the motion compensation imaging modes. Based on the imaging process, the simulator consists of a spatial response module, a spectral response module, and a radiometric response module. The FOV separation is simulated in the imaging position calculation process of the spatial response module, and the motion compensation is considered in both the imaging position simulation and the radiometric response module. Using the simulator, the imaging position data is created to quantify the misregistration. The result shows that the imaging track deviation, caused by the FOV separation, between the VNIR sensor and SWIR sensor keeps a constant quantity in the latitude direction. However, the deviation will increase along with the imaging time in the longitude direction. When the two imaging modes are both considered, the deviation is symmetrical relative to the nadir point in the latitude direction. However, the deviation is not symmetrical in the longitude. In order to analyze the misregistration effect on the imaging data, simulation data with different imaging modes on Dongtianshan remote sensing testing field is created using the simulator. And the misregistration effect on the spectra of flat ground pixel and rugged ground pixel are analyzed.

Paper Details

Date Published: 12 January 2018
PDF: 7 pages
Proc. SPIE 10620, 2017 International Conference on Optical Instruments and Technology: Optoelectronic Imaging/Spectroscopy and Signal Processing Technology, 1062010 (12 January 2018); doi: 10.1117/12.2286578
Show Author Affiliations
Dongxing Tao, Beijing Institute of Spacecraft Environment Engineering (China)
Jing Wang, Beijing Institute of Spacecraft Environment Engineering (China)
Chao Zhang, Beijing Institute of Remote Sensing Information (China)
Yanqiang Bi, Beijing Institute of Spacecraft Environment Engineering (China)
Yonghong Shang, Beijing Institute of Spacecraft Environment Engineering (China)
Yifei Pei, Beijing Institute of Spacecraft Environment Engineering (China)
Jingchuan Zhang, Beijing Institute of Spacecraft Environment Engineering (China)
Guorui Jia, Beihang Univ. (China)


Published in SPIE Proceedings Vol. 10620:
2017 International Conference on Optical Instruments and Technology: Optoelectronic Imaging/Spectroscopy and Signal Processing Technology
Guohai Situ; Xun Cao; Wolfgang Osten; Liquan Dong, Editor(s)

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