摘要
基于940nm近红外水汽吸收带及两侧窗区通道探测大气水汽总量是自20世纪80年代兴起的卫星遥感大气水汽方法,这一方法主要利用差分吸收概念反演柱水汽总量。文章分析比较了不同反演算法各自特点和存在问题,同时针对我国不同的卫星数据进行了多次水汽反演试验,最好结果的误差为0.04g/cm2,这为FY-3气象卫星中分辨率光谱成像仪陆地大气可降水业务产品算法的开发打下了坚实基础。
The atmospheric water vapor retrieval technology based on the 940nm near-infrared （NIR） absorption region and near window bands began in the 1980s. The algorithm of water vapor derivations is mainly based on the absorption difference theory. The characteristics and problems of this algorithm developed by several researchers are summarized, and some experiments on NIR water vapor retrieval are conducted by using the China＇ s satellite data. Of these results, the smallest error is 0.04 g/cm^2. This provides a compact basis for the operational algorithm developing of total precipitation water （TPW） over land based on the future FY 3/MERSI.
出处
《气象科技》
北大核心
2010年第5期581-587,共7页
Meteorological Science and Technology
基金
国家863计划课题"面向气候应用的气象卫星长序列历史数据集统一辐射再定标技术"(2007AA12Z145)资助
关键词
近红外通道
水汽总量
差分吸收
near infrared band, column water vapor, difference absorption
