陆地卫星光学载荷地基自动辐射定标与验证分析  

Ground-based Automatic Radiometric Calibration of Land Observation Satellite Optical Sensors and Cross Validation Analysis

作　　者：庞博 马灵玲[1] 刘耀开[1,2] 王宁 赵永光[1] 韩启金[3] 孟凡荣[1] 李传荣[1] 唐伶俐[1] 陈志明[4] 王国珠 Pang Bo;Ma Lingling;Liu Yaokai;Wang Ning;Zhao Yongguang;Han Qijin;Meng Fanrong;Li Chuanrong;Tang Lingli;Chen Zhiming;Wang Guozhu(Key Laboratory of Quantitative Remote Sensing Information Technology,Academy of Opto-Electronics,Chinese Academy of Sciences,Beijing 100094,China;University of Chinese Academy of Sciences,Beijing 100049,China;China Center for Resources Satellite Data and Application,Beijing 100094,China;Inner Mongolia North Heavy Industries Group Co.Ltd,Inner Mongolia 014033,China)

机构地区：[1]中国科学院光电研究院中国科学院定量遥感信息技术重点实验室,北京100094 [2]中国科学院大学,北京100049 [3]中国资源卫星应用中心,北京100094 [4]内蒙古北方重工业集团有限公司,内蒙古014033

出　　处：《遥感技术与应用》2019年第1期146-154,共9页Remote Sensing Technology and Application

基　　金：国家重点研发计划项目(2016YFB0500402);国际大科学计划项目(181811KYSB20160040);国家自然科学基金项目(41601398)共同资助

摘　　要：针对传统地基辐射定标方法效费比低、单次定标不确定性大,难以满足卫星载荷高频次、高精度辐射定标等问题,发展了一种面向常态化运行需求的光学载荷地基自动辐射定标方法,并基于内蒙古包头附近的科技部"国家高分辨遥感综合定标场"(下简称"包头场")对Landsat-8/OLI相应通道进行了自动辐射定标试验及交叉验证分析,分析结果表明:2016～2017年过境包头场的11次Landsat-8/OLI自动辐射定标结果一致性较好;对于Landsat-8/OLI的蓝、绿、红、近红外4个波段表观反射率,地基自动定标结果与星上结果之间的平均相对偏差分别为0.83%、-0.21%、-0.20%、-1.37%,标准差则分别为2.78%、2.89%、2.94%、2.20%。进一步地,还对地基自动辐射定标过程中各项误差来源进行了量化分析,其在Landsat-8/OLI蓝、绿、红、近红外4个波段的不确定度分别为5.06%、4.65%、4.80%、4.98%。由此可见所发展的地基自动辐射定标方法除了可以很大程度上提升陆地卫星外场定标的频次,定标结果亦具有较好的稳定性与可靠性,对于陆地卫星光学载荷辐射性能的动态监测及数据质量保证具有重要意义。Due to the low cost-effectiveness and large uncertainty of single calibration for traditional ground-based radiometric calibration methods,it is difficult to meet the requirement ofhigh-precision radiometric calibration of satellite payloads.Aroutinely-operated ground-based automatic radiometric calibration method was developed and applied on radiometric calibration and cross validation analysis of Landsat-8/OLI opticalsensor based on the "National Calibration and Validation Site for High Resolution Remote Sensors"(hereinafter referred to as the "Baotou Site") in Baotou.The comparison of 11 observation results(from May 2016 to April 2017) between on-board calibration and ground-based calibrationare in good agreement:for the four bands of blue,green,red and near infrared,the average relative deviation between ground-based calibration and on-board calibration was 0.83%,-0.21%,-0.20%,and-1.37%,respectively,while the standard deviation was 2.78%,2.89%,2.94%,and 2.20%,respectively.Further,quantitative analyses on the sources of errors in the process of ground-based automatic radiometric calibration was conducted.The results showed that the final uncertainties of ground-based automatic radiometric calibration in the four bands of blue,green,red,and near infrared were 5.06%,4.65%,4.80%,and 4.98%,respectively.Good consistency between ground-based calibration and on-board calibration proved the reliability of this method,which can dramatically promote the frequency and timeliness of satellite radiometric calibration.

关 键 词：自动辐射定标 包头定标场 不确定度估计 Landsat-8/OLI 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]