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一个针对ASTER数据同时反演地表温度和比辐射率的四通道算法
引用本文:毛克彪,施建成,覃志豪,宫鹏,徐斌,蒋玲梅.一个针对ASTER数据同时反演地表温度和比辐射率的四通道算法[J].遥感学报,2006,10(4):593-599.
作者姓名:毛克彪  施建成  覃志豪  宫鹏  徐斌  蒋玲梅
作者单位: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;中国农业科学院,农业资源与农业区划研究所农业生态研究室,北京,100081;中国科学院,研究生院,北京,100049
2. 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
3. 中国农业科学院,农业资源与农业区划研究所农业生态研究室,北京,100081
基金项目:国家自然科学基金;中国科学院知识创新工程项目;国家重点基础研究发展计划(973计划)
摘    要:本文利用对地观测卫星多传感器的特点,提出了针对ASTER数据同时反演地表温度和比辐射率的多通道算法。即利用ASTER数据的第11,12,13,14热红外波段建立热辐射传输方程,并通过对于地表比辐射率分析可知,ASTER4个热红外波段的比辐射率可以用近似线性方程表示,得到了6个方程6个未知数,从而形成了针对ASTER数据的同时反演地表温度和比辐射率的多通道算法。对于关键参数大气透过率,则是通过同一颗星的MODIS传感器的3个近红外波段反演大气水汽含量,然后用MODTRAN模拟大气水汽含量与ASTER热红外波段的统计关系,并进而根据这二关系来计算ASTER热红外波段的大气透过率。由于MODIS和ASTER是在同一颗星上。因此这种大气透过率估计方法保证了地表温度反演过程中所需大气参数的同步获取。

关 键 词:亮度温度  地表温度  多通道算法
文章编号:1007-4619(2006)04-0593-07
收稿时间:2005-08-15
修稿时间:2005-10-25

A Four-Channel Algorithm for Retrieving Land Surface Temperature and Emissivity from ASTER Data
MAO Ke-biao,SHI Jian-cheng,QIN Zhi-hao,GONG Peng,XU Bin and JIANG Ling-mei.A Four-Channel Algorithm for Retrieving Land Surface Temperature and Emissivity from ASTER Data[J].Journal of Remote Sensing,2006,10(4):593-599.
Authors:MAO Ke-biao  SHI Jian-cheng  QIN Zhi-hao  GONG Peng  XU Bin and JIANG Ling-mei
Institution:1. State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing Applications, Chinese Academy of Science, Beijing Normal University, Beijing 100101, China; 2. Laboratory of Agricultural Ecology, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China; 3. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
Abstract:According to the multiple-instrument characteristics of the Terra(EOS) satellite.A multiple-channel algorithm was proposed to retrieve land surface temperature and emissivity from ASTER/MODIS data at the same time.That is,at first,four thermal bands(11, 12,13,14) of ASTER were utilized to build radiance transfer equation.After analyzing the characteristics of the emissivity in ASTER TIR,the parameter emissivity is described approximately as two linear equations.Thus,the multiple-band algorithm retrieving LST and emissivity from ASTER/MODIS data comes into being after uniting four radiation transfer equation and the linear equation of emissivity.The key parameter transmittance is obtained from retrieved water content of atmosphere through NIR bands of MODIS.Because ASTER and MODIS data are on the same satellite,the transmittance was timely obtained.
Keywords:ASTER  MODIS
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