星上辐射定标精度验证方法研究  

Accuracy Verification of On-Board Radiometric Calibration

作　　者：李鑫[1,2] 张黎明[1,2] 司孝龙[1,2] 陈洪耀[1,2] 黄文薪[1,2] 宋庆君[3] Li Xin;Zhang Liming;Si Xiaolong;Chen Hongyao;Huang Wenxin;Song Qingjun(Key Laboratory of Optical Calibration and Characterization,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei,Anhui 230031,China;Hefei Institute of Physical Science,Chinese Academy of Sciences,Hefei,Anhui 230031,China;National Satellite Ocean Application Service,Beijing 100089,China)

机构地区：[1]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 [2]中国科学院合肥物质科学研究院,安徽合肥230031 [3]国家卫星海洋应用中心,北京100089

出　　处：《光学学报》2020年第9期166-174,共9页Acta Optica Sinica

基　　金：国家自然科学基金(41601388)。

摘　　要：星上定标光谱仪(SCS)是HY-1C搭载的标准定标载荷,用于实现对同平台上其他多光谱载荷的辐射定标。基于星上定标光谱仪获得的星上定标结果,与MODIS的影像数据进行交叉定标,比较星上定标光谱仪与MODIS对相同地面区域的辐亮度数据和反射率数据,实现了对星上定标精度的评估与验证。通过对4次定标数据的处理和分析,结果表明,两者的最大相对偏差小于3%,满足同平台其他载荷的定标要求。In this study,a satellite calibration spectrometer(SCS),as a standard calibration load on HY-1C,was used for calibrating the remaining instruments on the same satellite platform.Further,the cross-calibration method was used to evaluate and verify the accuracy of on-board calibration by comparing the radiances and reflectances obtained via SCS and moderate-resolution imaging spectroradiometer(MODIS)with respect to the same ground area.By processing the calibration data four times on different dates,the maximum relative deviation of the radiance is observed to become less than 3%,which meets the calibration requirement with respect to the remaining loads on the HY-1Cplatform.

关 键 词：遥感 星上定标 高光谱辐射定标 交叉定标 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置] O433.4[自动化与计算机技术—控制科学与工程]