基于高光谱自动化观测设备的高分二号卫星在轨定标应用与验证

大气与环境光学学报 ›› 2024, Vol. 19 ›› Issue (5): 599-610.

• 光学遥感 • 上一篇

基于高光谱自动化观测设备的高分二号卫星在轨定标应用与验证

刘恩超1*, 潘琰1,2, 韦玮1, 李新1

1 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, 中国科学院通用光学定标与表征技术重点实验室, 安徽合肥 230031; 2 中国科学技术大学, 安徽合肥 230026

收稿日期:2022-05-05 修回日期:2022-07-07 出版日期:2024-09-28 发布日期:2024-10-11
通讯作者: E-mail: liuech@aiofm.ac.cn E-mail:liuech@aiofm.ac.cn
作者简介:刘恩超 (1985- ), 山东菏泽人, 博士, 副研究员, 主要从事卫星场地定标及相关仪器研发方面的研究工作。E-mail: liuech@aiofm.ac.cn
基金资助:
国家重点研发计划项目 (2018YFB0504600, 2018YFB0504604)

In-orbit calibration application and verification of Gaofen-2 satellite based on hyperspectral automatic observation equipment

LIU Enchao1*, PAN Yan1,2, WEI Wei1, LI Xin1

1 Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China; 2 University of Science and Technology of China, Hefei 230026, China

Received:2022-05-05 Revised:2022-07-07 Online:2024-09-28 Published:2024-10-11
Supported by:
National Key R&D Program of China

摘要/Abstract

摘要： 为验证高光谱自动化野外观测设备的地表反射率数据的应用效果，基于反射率基法开展了高分二号 (GF-2) 卫星遥感器的在轨定标数据应用及验证。首先系统介绍了设备安装定标场的状况及多种自动化观测设备的工作方式及性能指标，并给出了仪器的观测数据及地表反射率数据的计算方式。随后结合GF-2 卫星遥感器定标的需求并利用卫星大气数据产品和GF-2 遥感器的同步过顶观测影像，完成了GF-2 多光谱相机 (PMS) 遥感器的在轨定标。最后根据获得的定标系数，利用不同时段的遥感器影像数据进行了验证。两种不同地表的应用验证表明，卫星表观辐亮度的数据整体相对偏差优于2%，验证了高光谱设备在卫星遥感器在轨定标上的可行性。

关键词: 高光谱设备, 自动化观测, 地表反射率, 大气数据产品, 卫星在轨定标

Abstract: In order to verify the application effect of surface reflectance data of hyperspectral automatic field observation equipment, the application and verification of in-orbit calibration data of Gaofen-2 (GF-2) satellite remote sensor are carried out based on the reflectance-based method. Firstly, we systematically introduces the calibration field and the working mode and performance index of various automatic observation equipment, and demonstrates the calculation method of observation data and surface reflectance data of the instrument. Then, regarding to the calibration requirements of GF-2 satellite remote sensor, the in-orbit calibration of GF-2 panchromatic and multi-spectral (PMS) remote sensor is completed using satellite atmospheric data products and synchronous observation images of GF-2 remote sensor. Finally, based on the obtained calibration coefficients, the image data of remote sensors in different time periods are verified. The application verification of two different land surfaces shows that, the overall relative deviation of satellite apparent radiance is better than 2%, which verifies the feasibility of hyperspectral equipment in the in-orbit calibration of satellite remote sensors.

Key words: hyperspectral equipment, automatic observation, surface reflectance, atmospheric data products, in-orbit satellite calibration

中图分类号:

TP722.4

刘恩超, 潘琰, 韦玮, 李新. 基于高光谱自动化观测设备的高分二号卫星在轨定标应用与验证[J]. 大气与环境光学学报, 2024, 19(5): 599-610.

LIU Enchao, PAN Yan, WEI Wei, LI Xin. In-orbit calibration application and verification of Gaofen-2 satellite based on hyperspectral automatic observation equipment[J]. Journal of Atmospheric and Environmental Optics, 2024, 19(5): 599-610.

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基于高光谱自动化观测设备的高分二号卫星在轨定标应用与验证

In-orbit calibration application and verification of Gaofen-2 satellite based on hyperspectral automatic observation equipment

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