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基于MODIS和TM数据的陆面温度反演

DOI: 10.11834/jig.20070230

Keywords: 普适性单通道算法,陆地表面温度,北京,总大气水蒸汽含量,MODIS

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Abstract:

陆地表面温度(LST)反演一直是热红外遥感研究中的一大难题。目前,分辨率较高的Landsat5/TM数据是陆地表面温度(LST)反演的常用遥感信息源。然而,由于TM只有一个热通道,大多数情况下由TM6数据得到的都是星上亮度温度,与实际地表温度有较大差距。普适性单通道算法的提出为从TM6数据高精度地反演地表真实温度提供了可能。为寻找一条从TM6数据高精度反演陆地表面温度的有效途径,利用该算法对北京地区的地表温度进行了反演试验,对该算法必需的总大气水蒸汽含量通过MODIS数据计算获得。同时利用卫星过境时的同步实测数据对反演精度进行了检验,并与用标准大气数据得到的结果进行了比较。其结果表明,该方法具有较高的反演精度,其rmsd值为1.67℃,显示了多源数据结合的优势。

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