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大气可降水量对于研究水循环、气溶胶属性、气溶胶-云的相互作用、能量守衡以及气候有重要意义,同时大气中的水汽含量也是影响遥感应用的主要因素之一。MODIS是新一代“图谱合一”的光学遥感仪器,具有36个光谱通道,分布在0.4～14μm的电磁波谱范围内,MODIS仪器的地面分辨率分别为250m、500m和1000m,每隔一天或两天可以获得全球最新的数据。Gao等(1998)、Kaufman等(1990,1992)经过大量研究表
Atmospheric precipitable water is important for studying water cycle, aerosol properties, aerosol-cloud interaction, energy balance and climate, meanwhile the atmospheric water vapor content is also one of the main factors affecting the application of remote sensing. MODIS is a new generation of optical remote sensing instrument with “spectrum combination” with 36 spectral channels distributed in the electromagnetic spectrum range of 0.4 ~ 14μm. The MODIS instrument has ground resolutions of 250m, 500m and 1000m every other day Or two days to get the world’s latest data. Gao et al. (1998), Kaufman et al. (1990, 1992) have undergone extensive research