高分五号 02 星多角度偏振成像仪在轨辐射性能初步评价

大气与环境光学学报 ›› 2023, Vol. 18 ›› Issue (4): 310-322.

• 高分五号 02 星偏振载荷在轨测试和信息处理 • 上一篇下一篇

高分五号 02 星多角度偏振成像仪在轨辐射性能初步评价

朱思峰 1,2,3, 朱梦瑶 4, 伽丽丽 1*, 许华 1, 李正强 1,2*, 谢一凇 1, 洪津 5, 涂碧海 5, 孟炳寰 5

1 中国科学院空天信息创新研究院, 国家环境保护卫星遥感重点实验室, 北京 100101; 2 中国科学院大学, 北京 100049; 3 上海卫星工程研究所, 上海 201109; 4 吉林大学地球探测科学与技术学院, 吉林长春 130026; 5 中国科学院合肥物质科学研究院安徽光学精密机械研究所, 安徽合肥 230031

收稿日期:2022-07-18 修回日期:2022-10-11 出版日期:2023-07-28 发布日期:2023-08-14
通讯作者: E-mail: qiell@radi.ac.cn; lizq@radi.ac.cn E-mail:lizq@aircas.ac.cn
作者简介:朱思峰 (1994- ) , 安徽安庆人, 博士研究生, 主要从事卫星传感器在轨定标方面的研究。E-mail: zhusf@aircas.ac.cn
基金资助:
国家自然科学基金 (42175148) , 国家杰出青年科学基金 (41925019)

Preliminary evaluation of in-flight radiation performance of directional polarimetric camera of Gaofen-5(02) satellite

ZHU Sifeng 1,2,3, ZHU Mengyao 4, QIE Lili 1*, XU Hua 1, LI Zhengqiang 1,2*, XIE Yisong 1, HONG Jin 5, TU Bihai 5, MENG Binghuan 5

1 State Environmental Protection Key Laboratory of Satellite Remote Sensing, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100101, China; 2 University of Chinese Academy of Sciences, Beijing 100049, China; 3 Shanghai Institute of Satellite Engineering, Shanghai 201109, China; 4 College of Geoexploration Science and Technology, Jilin University, Changchun 130026, China; 5 Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China

Received:2022-07-18 Revised:2022-10-11 Published:2023-07-28 Online:2023-08-14
Contact: Zheng-Qiang Li E-mail:lizq@aircas.ac.cn

摘要/Abstract

摘要： 2021年9月我国成功发射的高分五号 02 星［ GF-5(02)] 上搭载有多角度偏振成像仪 (DPC) 和高精度偏振扫描仪 (POSP), 组成了“偏振交火”观测方案。为评价GF-5(02)卫星DPC传感器的在轨辐射性能, 基于2022 年1 月DPC和 POSP观测数据, 采用海洋瑞利散射和“偏振交火”交叉定标两种方法, 实现了DPC在轨绝对辐射定标和视场内相对辐射一致性检验。结果表明, DPC/GF-5(02)在轨后的绝对辐射和相对辐射响应较发射前的实验室定标结果均未发生明显改变, 在轨前后各波段绝对辐射系数差异均小于5.3%, 视场内相对辐射响应变化均小于2%。其中, 443 nm波段瑞利散射和“偏振交火”交叉两种方法获得的绝对辐射定标系数一致性较高, 偏差约为2%；而490 nm和670 nm波段两方法定标结果偏差较大, 偏差分别为7.4%和7.7%。整体上, DPC/GF-5(02) 在轨后的辐射稳定性优于DPC/GF-5。

关键词: 高分五号 02 星, 多角度偏振成像仪, 绝对辐射系数, 相对辐射系数, 瑞利散射定标;“ 偏振交火”定标

Abstract: In September 2021, China successfully launched the Gaofeng-5(02) satellite (GF-5(02)), which is equipped with a directional polarimetric camera (DPC) and a high-precision particulate observing scanning polarimeter (POSP), forming a "polarization crossfire" observation program. In order to evaluate the inflight radiation performance of the DPC sensor loaded on GF-5(02) satellite, based on the DPC and POSP observation data in January 2022, two methods, ocean Rayleigh scattering and "polarization crossfire" cross-calibration between DPC and POSP, were used to achieve the absolute calibration in-flight and the relative radiometric consistency test in the field of view of DPC. The results show that compared with the laboratory calibration results before launch, the absolute radiometric and relative radiometric response of DPC/GF-5(02) after launch have not changed significantly, the absolute calibration coefficient of each band changes less than 5.3% after launch, and the change of relative radiometric response in the field of view is less than 2%. Specifically, the absolute calibration coefficients obtained by the two methods of Rayleigh scattering and cross calibration (DPC and POSP) at 443 nm band have a high consistency, with a deviation of about 2%, while the calibration results of the two methods at 490 nm and 670 nm bands have a large deviation, with a deviation of 7.4% and 7.7%, respectively. Overall, the radiation stability of DPC/GF-5(02) after orbit is better than that of DPC/GF-5.

Key words: Gaofen-5(02) satellite, directional polarimetric camera, absolute radiometric coefficient; relative radiometric coefficient, Rayleigh scattering calibration, "polarization crossfire" cross calibration

中图分类号:

TP931

朱思峰, 朱梦瑶, 伽丽丽, 许华, 李正强, 谢一凇, 洪津, 涂碧海, 孟炳寰 . 高分五号 02 星多角度偏振成像仪在轨辐射性能初步评价[J]. 大气与环境光学学报, 2023, 18(4): 310-322.

ZHU Sifeng , ZHU Mengyao , QIE Lili , XU Hua , LI Zhengqiang , XIE Yisong , HONG Jin , TU Bihai , MENG Binghuan . Preliminary evaluation of in-flight radiation performance of directional polarimetric camera of Gaofen-5(02) satellite[J]. Journal of Atmospheric and Environmental Optics, 2023, 18(4): 310-322.

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高分五号 02 星多角度偏振成像仪在轨辐射性能初步评价

Preliminary evaluation of in-flight radiation performance of directional polarimetric camera of Gaofen-5(02) satellite

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