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基于亚像元目标的高分辨率光学遥感卫星在轨辐射定标方法

On-Orbit Radiometric Calibration of High-Resolution Optical Remote Sensing Satellite Based on Sub-Pixel Targets

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摘要

卫星遥感在自然资源、生态环境、应急管理等国民经济建设与国防安全领域发挥着至关重要的作用。遥感信息的定量化应用是空间遥感载荷研究的重点,定量化遥感应用的深度与广度取决于光学遥感卫星的辐射定标精度。辐射定标是将遥感器的输出数据转换为被观测目标辐射量值的过程,进而定量化解译地物目标的物理特征及演变规律[1-3]。

Abstract

Radiometric calibration is one of the key technologies for quantitative application of optical remote sensing satellite data. This study proposes an on-orbit radiometric calibration approach for a high-resolution optical remote sensing satellite based on sub-pixel targets. The detection reference is the reflected point source, and the ground synchronization measurement is mainly used. Atmospheric transmittance and incident pupil radiance are obtained by simplifying radiometric transfer calculation. The method can also effectively isolate the response of a remote sensing image created by sub-pixel targets from the response produced by sky path radiance, ground-atmospheric coupled radiance, and background radiance, according to multi-energy sub-pixel target setting and on-orbit point spread function detection results. The approach can break the limit of time, locale, and weather conditions and achieve high precision calibration for the optical remote sensing satellite with a full dynamic range in complex environments. Results show that calibration uncertainty for the high-resolution optical remote sensing satellite based on sub-pixel targets is lower than 3.2%. Moreover, the calibration result of the proposed method is different from that of the gray-scale target method by 3%. A small and light sub-pixel target can satisfy the high frequency on-orbit calibration application of the optical sensing satellite.

Newport宣传-MKS新实验室计划
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DOI:10.3788/AOS201939.1001001

所属栏目:大气光学与海洋光学

基金项目:国家自然科学基金、十三五航天预研基金;

收稿日期:2019-04-02

修改稿日期:2019-05-31

网络出版日期:2019-10-01

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徐伟伟:中国科学院安徽光学精密机械研究所通用光学定标与表征技术重点实验室, 安徽 合肥 230031中国科学院合肥物质科学研究院, 安徽 合肥 230031
张黎明:中国科学院安徽光学精密机械研究所通用光学定标与表征技术重点实验室, 安徽 合肥 230031中国科学院合肥物质科学研究院, 安徽 合肥 230031
李鑫:中国科学院安徽光学精密机械研究所通用光学定标与表征技术重点实验室, 安徽 合肥 230031中国科学院合肥物质科学研究院, 安徽 合肥 230031
司孝龙:中国科学院安徽光学精密机械研究所通用光学定标与表征技术重点实验室, 安徽 合肥 230031中国科学院合肥物质科学研究院, 安徽 合肥 230031
许永平:中国科学院安徽光学精密机械研究所通用光学定标与表征技术重点实验室, 安徽 合肥 230031中国科学院合肥物质科学研究院, 安徽 合肥 230031

联系人作者:徐伟伟(weilxu@aiofm.ac.cn)

备注:国家自然科学基金、十三五航天预研基金;

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引用该论文

Weiwei Xu,Liming Zhang,Xin Li,Xiaolong Si,Yongping Xu. On-Orbit Radiometric Calibration of High-Resolution Optical Remote Sensing Satellite Based on Sub-Pixel Targets[J]. Acta Optica Sinica, 2019, 39(10): 1001001

徐伟伟,张黎明,李鑫,司孝龙,许永平. 基于亚像元目标的高分辨率光学遥感卫星在轨辐射定标方法[J]. 光学学报, 2019, 39(10): 1001001

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