Acta Optica Sinica, Volume. 42, Issue 6, 0628001(2022)
On-Orbit Radiometric Calibration Method of Optical Remote Sensor in Complex Environment
Vicarious calibration in large and uniform sites by the reflectance-based method is currently a common on-orbit calibration method. The limited number and low reflectivity of uniform sites in China have restricted calibration frequency and accuracy. The gray-scale target method has achieved high-precision radiometric calibration in a uniform site, but how to break through the single environmental background of a large uniform site to achieve high-frequency calibration is still a tough problem. On the basis of the classic irradiance-based method, this paper proposes an improved irradiance-based method suitable for gray-scale targets, analyzes a method of on-orbit radiometric calibration in complex environments, and experimentally verifies the method on an optical satellite. The results show that the proposed improved irradiance-based method, with a maximum difference of less than 3.5% from the reflectance-based method, can achieve on-orbit radiometric calibration in a complex background. It provides a technical approach for high-frequency and high-precision on-orbit radiometric calibration of optical satellites in China.
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Shiwei Bao, Hongyao Chen, Liming Zhang, Wenxin Huang, Xiaolong Si, Chao Zhang, Zhuo Chen. On-Orbit Radiometric Calibration Method of Optical Remote Sensor in Complex Environment[J]. Acta Optica Sinica, 2022, 42(6): 0628001
Category: Remote Sensing and Sensors
Received: Jul. 21, 2021
Accepted: Aug. 31, 2021
Published Online: Mar. 8, 2022
The Author Email: Chen Hongyao (hychen@aiofm.ac.cn)