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AMTIS单通道多角度热红外图像的大气订正

Keywords: 热红外大气订正单通道多角度

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Abstract:

给出了在假定无大气廓线情况下,AMTIS单通道多角度热红外图像的大气订正算法.算法需要三个参数:其中大气等效温度,用“最小标准差法”从图像自身来估算;大气透过率通过地表的绝对湿度或者太阳辐射计得到的大气水汽含量参数来估算;像元的辐射率比由AMTIS得到的NDVI计算.通过将大气订正后的亮度温度与地面实测点亮度温度比较,两者相差约1.2K,这对于无大气廓线情况下单通道热红外图像的大气订正来说,结果是可以接受的.

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