Combining Lunar and Solar On-Orbit Calibration for Polarization Spectral Imager

被引：0
|
作者：
Kong J. [1 ]
机构：
[1] Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology, School of Optics and Photonics, Beijing Institute of Technology, Beijing
来源：
Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology | 2023年 / 43卷 / 04期
关键词：
diffuse reflector fabrication; lunar calibration; polarization spectrum imager; solar calibration;
D O I：
10.15918/j.tbit1001-0645.2022.104
中图分类号：
学科分类号：
摘要：
Due to the comprehensive influence of gravity, stress release, heat and component aging, it is necessary to calibrate the space remote sensor periodically on-orbit. In order to improve the accuracy of spaceborne radiation calibration, an on-orbit calibration method was proposed, combining lunar calibration and solar calibration. Firstly, using lunar imaging, the on-orbit absolute radiation calibration of the central field was carried out, and the satellite ground difference and on-orbit change of radiation characteristics of the instrument were calibrated. Then, using solar calibration, the non-uniformity of the detector was obtained. Finally, the calibration uncertainty of the polarization spectrum imager was analyzed. The results show that the total uncertainty of absolute radiation calibration is 3.77%, meeting the requirement of 5% radiation calibration accuracy. The method proposed in this paper provides an important technical support for improving the calibration accuracy of remote sensors and the detection ability of aerospace load. © 2023 Beijing Institute of Technology. All rights reserved.
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页码：394 / 402
页数：8
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