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环境星CCD数据大气校正研究

DOI: 10.6046/gtzyyg.2010.04.02, PP. 6-9

Keywords: ?环境与灾害监测预报小卫星A星,CCD图像,大气校正,6S模型

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Abstract:

?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-1A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-1A星CCD图像的大气影响,获取地物绝对反射率。

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