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
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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。Abstract: The Variational Simultaneous Physical Retrieval Model has been developed upon the Improved Simultaneous Physical Retrieval Model (ISPRM).In the light of the functional analysis theory.the VSPRM2.which is derived from the radiative transfer equation.is more general than the ISPRM.The expression of VSPRMI.the low class of VSPRM2.is identical 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 synergy retrieval of this model.Also.it has dealt with the problem of parameterization of water vapor's kernel functions and retrieval of water vapor remote sensing.
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