利用MODIS影像反演大气水汽含量的方法研究  

Study on the atmospheric water vapor from MODIS image

作　　者：赵有兵[1] 顾利亚[1] 黄丁发[1] 吕弋培[2] 

机构地区：[1]西南交通大学测量工程系,成都610031 [2]四川省地震局,成都610041

出　　处：《测绘科学》2008年第5期51-53,45,共4页Science of Surveying and Mapping

基　　金：国家自然科学基金(40474008);教育部博士学科点专业基金(20040613025)

摘　　要：目前,利用MOD IS近红外波段反演大气水汽含量主要采用两通道比值加权法和三通道比值加权法,为了对比研究这两种的方法,本文结合四川地区MOD IS影像,采用两通道比值法和三通道比值法分别获得17、18、19近红外通道大气水汽值,然后对两通道比值法和三通道比值法计算的三个近红外通道大气水汽值取加权平均,分别得到该地区加权平均大气水汽含量。对子区域(成都地区)MOD IS的两种加权平均大气水汽含量与同时同地SONDE大气水汽含量进行对比分析,实验结果表明:用MOD IS近红外波段反演大气水汽含量拟采用三通道比值加权法。At present, the main methods to retrieve atmospheric water vapor from MODIShear infrared channel are two- channel ratio weighted method and three - channel ratio weighted method. In order to compare these two methods, based on MODIS image of Chengdu region, the atmospheric water vapor of 17, 18, 19 near IR channel via two -channel ratio method and three -channel ratio method is obtained separately. Then a weighted average atmospheric water vapor is gotten. By comparing weighted atmospheric water vapor with the SONDE atmospheric water vapor in the subregion （ Chengdu）, it shows that three - channel ratio weighted method is better.

关 键 词：MODIS 两通道比值加权法 三通道比值加权法 大气水汽含量 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]