地基多波段遥感大气可降水量研究  

MULTI-SPECTRAL OPTICAL REMOTE SENSING OF PRECIPITABLE WATER

作　　者：刘三超[1] 柳钦火[1] 高懋芳[2] 

机构地区：[1]遥感科学国家重点实验室中国科学院遥感应用研究所 [2]中国农业科学院农业资源与农业区划研究所,北京100081

出　　处：《国土资源遥感》2006年第4期6-9,共4页Remote Sensing for Land & Resources

基　　金：国家自然科学基金项目(40371087);中国科学院知识创新工程重要方向性项目(KZCX3-SW-338-2);973项目(G2000077903)

摘　　要：利用自动观测多波段CE 318太阳分光光度计,首先结合地面资料求出瑞利散射光学厚度,再用870 nm和1020 nm非吸收通道内插出936 nm通道的气溶胶光学厚度。通过辐射传输模型MODTRAN模拟不同大气模式和观测角下的大气可降水量和透过率关系,利用改进的Langley法计算出大气可降水量,分析了影响结果的误差源。Water vapor is a key - photometer data, the modified parameter in climate change and quantitative remote sensing. For Langley method can be used to derive precipitable water （PW）. authors retrieved PW by means of 940 nm water vapor high - ground based sun In this paper, the on 870 nm and 1 020 nm channels. After deriving aerosol optical thickness （AOT） of 870 nm and 1 020 nm channels, AOT of 936 nm was interpolated by using the Angstrom law. Using simulation with the MODTRAN 4.0 radiation transform model under different atmospheric models and zenith angles, the authors detected the relationship between PW and atmospheric transmittance. Then PW was retrieved every two minutes by means of the modified Langley method. The results show that the temporal variation of PW in autumn remains remarkable in the study area, and the main error source seems to be the cloud effect. This method is useful in atmospheric and thermal remote sensing studies.

关 键 词：大气可降水量 透过率 改进的Langley法 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置] P412.13[自动化与计算机技术—控制科学与工程]