天绘一号卫星多传感器协同辐射定标方法

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英文篇名：Multi-Sensor Cooperative Radiometric Calibration Method of Mapping Satellite-1 作者：杜丽丽 ; 易维宁 ; 王昱 ; 崔文煜 ; 方薇 英文作者：Du Lili;Yi Weining;Wang Yu;Cui Wenyu;Fang Wei;Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences;Xi′an Institute of Surveying and Mapping; 关键词：大气光学 ; 天绘一号 ; 灰阶靶标 ; 协同辐射定标 ; 反射率反演 英文关键词：atmospheric optics;;Mapping Satellite-1;;gray-scale tarps;;cooperative radiometric calibration;;reflectance retrieval 中文刊名：光学学报 英文刊名：Acta Optica Sinica 机构：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;西安测绘研究所; 出版日期：2018-12-25 07:02 出版单位：光学学报 年：2019 期：04 基金：国家自然科学基金(41601379);; 国家973计划(61322504) 语种：中文; 页：42-49 页数：8 CN：31-1252/O4 ISSN：0253-2239 分类号：V441;TP212

摘要

提出了一种基于灰阶靶标的多传感器协同辐射定标方法,通过有效利用具有自动化观测设备的固定定标场、合理共享其他卫星的移动靶标场来提高定标频次。根据灰阶靶标的光谱平坦特性及同平台多传感器观测时相、几何、视场的一致性,建立了多光谱相机与全色高分辨相机间的辐亮度关系模型,实现了全色高分辨相机对多光谱相机的协同辐射定标。天绘一号卫星星地同步实验结果表明:建立的辐亮度关系模型具有通用性;多光谱相机协同与场地辐射定标系数相对差异小于5.3%;协同辐射定标精度优于5%,在提高效率的同时,可获取与场地辐射定标相当的精度。
        Using the fixed calibration field with automatic observation equipment and sharing the other satellite′s moving targets fields, a multi-sensor cooperative radiometric calibration method is proposed to improve calibration frequency. This method is developed based on the spectral flatness of the gray-scale tarps and the consistency of observation phase, geometry and field of the multi-sensors on the same platform. The radiance relationship model between the multi-spectral camera and the high resolution panchromatic camera is established, and then the cooperative radiometric calibration of the multi-spectral camera is realized by the high resolution panchromatic camera. The synchronous experiment results of Mapping Satellite-1 show that the radiance relationship model is universal, the relative difference between cooperative and site radiometric calibration coefficient of the multi-spectral camera is less than 5.3%, and the cooperative radiometric calibration precision is less than 5%. Compared with the site radiometric calibration, the same calibration precision is obtained while the calibration efficient is improved.

引文

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