On-orbit geometric calibration and accuracy verification of GF-6 WFV camera

被引：0
|
作者：
Wang M. [1 ]
Guo B. [1 ]
Long X. [2 ]
Xue L. [1 ]
Cheng Y. [3 ]
Jin S. [1 ]
Zhou X. [4 ]
机构：
[1] State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan
[2] China Center for Resources Satellite Date and Application, Beijing
[3] China Aerospace Science & Industry Corp 8511 Research Institute, Nanjing
[4] Institute of Electrics, Chinese Academy of Sciences, Beijing
来源：
Cehui Xuebao/Acta Geodaetica et Cartographica Sinica | 2020年 / 49卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Absolute calibration; Positioning accuracy; Registration accuracy; Relative calibration; WFV camera;
D O I：
10.11947/j.AGCS.2020.20190265
中图分类号：
学科分类号：
摘要：
The wide field of view(WFV) camera on GF-6 satellite can achieve the swath width up to 800 km by single camera, which has unique advantages for large-scale surface observation and environmental monitoring. On-orbit geometric calibration is a key technology of optical remote sensing satellite geometric processing, and directly affects the geometric quality of images. Considering the distortion characteristics of the ultra-large field of view and the imaging characteristics of multi-spectral bands for WFV camera, this paper proposes a method of on-orbit geometric calibration for WFV camera. The system errors of WFV camera are compensated by a geometric calibration model based on detector direction angle, and the calibration parameters of each band are estimated jointly by absolute calibration and relative calibration methods. Using Landsat 8 digital orthophoto image, ZY-3 digital surface modeland ASTER GDEM as reference data, the absolute calibration and relative calibration of WFV camera are processed. The geometric calibration results show that the absolute positioning accuracy of WFV image is about 3 pixels, the internal geometric accuracy is within 1 pixel, and the band-to-band registration accuracy is better than 0.3 pixels, which show that the geometric quality of GF-6 WFV camera has been significantly improved after on-orbit geometric calibration. © 2020, Surveying and Mapping Press. All right reserved.
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页码：171 / 180
页数：9
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