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.
作者
李鑫
张黎明
司孝龙
陈洪耀
黄文薪
宋庆君
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)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2020年第9期166-174,共9页
Acta Optica Sinica
基金
国家自然科学基金(41601388)。
关键词
遥感
星上定标
高光谱辐射定标
交叉定标
remote sensing
on-board calibration
hyperspectral radiometric calibration
cross calibration
