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.
出处
《测绘科学》
CSCD
北大核心
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)
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
MODIS
two - channel ratio weighted method
three - channel ratio weighted method
atmospheric water vapor
