环境星CCD数据大气校正研究  

A Study of HJ-1A CCD Image Atmospheric Correction

作　　者：孙源[1,2,3] 顾行发[1,3] 余涛[1,3] 高海亮[1,2,3] 

机构地区：[1]中国科学院遥感应用研究所遥感科学国家重点实验室,北京100101 [2]中国科学院研究生院,北京100039 [3]国家航天局航天遥感论证中心,北京100101

出　　处：《国土资源遥感》2010年第4期6-9,共4页Remote Sensing for Land & Resources

基　　金：中国科学院百人计划项目(编号:04Y015)和中国科学院知识创新工程重要方向项目"航天遥感图像仿真模拟关键技术研究"(编号:KZCX2-YW-303)共同资助;国家航天局航天遥感论证中心的项目支持

摘　　要：利用6S模型和同步气象资料,对国产环境与灾害监测预报小卫星HJ-1 A的CCD1传感器数据进行了大气校正和反射率反演。同时对CCD1传感器1～4波段大气校正前后的反射率变化进行了对比研究,发现大气校正后的1～3波段的地面反射率明显降低,4波段的地面反射率升高;利用同步野外实测地面数据对大气校正后的反射率数据进行了检验,两者结果基本一致;此外,还进行了定量化误差分析,以同步野外实测地面数据作为标准,将大气校正后的反射率数据与之对比,分析了可能带来误差的原因。结果表明,利用6S大气校正方法能够有效去除HJ-1 A星CCD图像的大气影响,获取地物绝对反射率。This paper deals with a suitable atmospheric correction method based on HJ - 1A CCD Image. A method based on 6S radiation transfer code and isochronous meteorological information on sensing time was used in the atmosphere correction,which is an operational method of correcting visible and near - infrared data for atmospheric effects. Validation analysis was conducted by comparing the reflectance data corrected and uncorrected atmospherically. Significant differences occurred between them ： the values of the corrected reflectance of CCD1 - 3 decreased obviously,whereas those of CCD4 increased. The retrieved surface reflectance was evaluated against the ground - based reflectance acquired during HJ - 1A satellite overpass, and it is shown that the curves of the figures are similar, and the compared values are agree with each other well. Based on the statistical analysis, some reasons for the errors were mentioned in the end of the paper.

关 键 词：环境与灾害监测预报小卫星A星 CCD图像 大气校正 6S模型 

分 类 号：TP751.1[自动化与计算机技术—检测技术与自动化装置]