The Study of Retrieving Clear Atmospheric Temperature Profile with Satellite Infrared Simulation Data
HUANG Jing;QIU Chong-jian;ZHANG Yan-wu
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College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China;2. Cold and Arid Regions Environmentaland Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
The inversion of HIRS/3 data is a typical ill-posed problem.SVD is an effective method which can solve ill-conditioned linear equations.It can keep numerical stability and utilize more effective information of each detection channels when it met the ill-posed problem of matrix.With SVD method,the data space and parameter space were classed and the effective information was extracted to retrieve temperature profiles.The ideal data tests analyzed some influence factors to retrieval results.These influence factors include temperature first-guess profile and vapor profile. The results indicate that for HIRS/3 data,the truncation exponent number of SVD can be chosen from four to seven,the first-guess profile has some effect on the retrieval and the inversion results are the steadiest when the errors in middle-level were biggish;the perturbation of vapor profile also has some biggish effect on the temperature retrieval results in middle-low levels and the brightness temperature in five,eight,ten,eleven and sixteen channels.
黄静;邱崇践;张艳武.
The Study of Retrieving Clear Atmospheric Temperature Profile with Satellite Infrared Simulation Data. Plateau Meteorology. 2005, 24(6): 913-919