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基于短波红外波段的Ⅱ类水体MODIS影像大气校正算法

Keywords: 大气校正,Ⅱ类水体,短波红外

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Abstract:

提出了一种基于短波红外(SWIR,shortwaveinfrared)波段离水反射率为0的Ⅱ类水体大气校正算法.采用MODIS的1.240μm和1.640μm两个SWIR波段的反射率计算出了可见光及近红外(NIR,nearinfrared)波段气溶胶散射反射率,进而反演得到了这些波段的离水反射率.应用该算法对中国东部近海及湖泊的Ⅱ类水体进行了大气校正,并与实测数据和常用的大气校正算法进行了比较分析,结果表明该算法能够有效地去除大气的影响.

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