东亚地区气象参数卫星遥感反演理论和方法研究Ⅱ:ISPRM和VSPRM2  

THE STUDY OF RETRIEVAL THEORY AND METHODS FROM SATELLITE REMOTE SENSING FOR METEOROLOGICAL PARAMETERS OVER THE EASTERN ASIA Ⅱ： ISPRM AND VSRM2

作　　者：黎光清[1] 董超华[1] 张文建[1] 张凤英[1] 王保华[1] 冉茂农[1] 吴雪宝[1] 王维和[1] 

机构地区：[1]国家卫星气象中心,北京100081

出　　处：《气象学报》1999年第6期668-680,共13页Acta Meteorologica Sinica

基　　金：国家自然科学基金!49794030;国家高技术863项目!863-2-7-4-12#;"九五"国家重大天气灾害形成机理和预测理论研

摘　　要：在改进的同步物理模式（ＩＳＰＲＭ）实践基础上，根据泛函数变分原理，按ＴＯＶＳ遥感方程，提出了较普遍的变分同步物理反演模式（ＶＳＰＲＭ２），其一级功能（ＶＳＰＲＭ１）和ＩＳＰＲＭ完全相同。ＶＳＰＲＭ从协合（ｓｙｎｅｒｇｙ）遥感反演机理，进一步拓宽和发展了ＩＳＰＲＭ模式。分析了ＶＳＰＲＭ２模式性能，指出这类模式的反演潜力。特别着重分析了模式的水汽核函数参数化和水汽遥感反演问题。针对这类非适定反问题的强欠定性质，为妥善使用先验信息，以获得精确的正演辐射率Ｒ。，还对透射率精确计算，低层温、湿廓线反演通道最佳选择和云层影响修正的改进作了进一步分析。经过长期业务运行条件反演比较实验，结果表明改进的物理反演方法（ＩＳＰＲＭ）是适于中国大陆包括青藏高原温、湿参数分布的反演方法，特别在有云条件下能反演出温、湿廓线。The Variational Simultaneous Physical Retrieval Model has been developed upon theImproved Simultaneous Physical Retrieval Model (ISPRM). In the light of the functionalanalysis theory. the VSPRM2, which is derived from the radiative transfer equation, ismore general than the ISPRM. The expression of VSPRMl, the low class of VSPRM2. isidentical with the ISPRM. VSPRM has advanced and broadened the function of ISPRM.This paper has analyzed the function of VSPRM2, pointed out the potentiality of synergyretrieval of this model. Also, it has dealt with the problem of parameterization of watervapor's kernel functions and retrieval of water vapor remote sensing.Because of the characteristics of this strong ill-posed inverse problem, a priori information must be used wisely in order to get the accurate calculation of radiance R. In theprevious poper, we have discussed how to build the best first guess field. the way todetermine the Ps and to correct the calculation of radiance. In this paper, we continue discussing in depth about the calculation of transmmittance, the determination of surface parameters and the selection for an optimum combination of channels for the low-level sounding.The long-term experiment and comparison work under operational environment haveshown that the ISPRM is useful for temperature and water vapor parameter's retrieval overChina territory including the Tibetan Plateau, also. it further testified the science of wellposed inverse theory.

关 键 词：东亚地区 气象参数 卫星遥感 反演理论 ISPRM 

分 类 号：P468[天文地球—大气科学及气象学] P407