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《ACTA GEODAETICA ET CARTOGRAPHICA SINICA》 1996-02
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ATMOSPHERIC PATH DELAY CORRECTION IN THE GPS MEASUREMENTS

Chen Hongbin,Lu Daren (Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing,100029)  
Two year(1992 and 1993) radiosonde data at Shanghai and Beijing are used to calculate the exact values of the atmospheric path delay in the microwave region.Based on these calculations and the meteorological parameters at the surface,the algorithms for dry and wet correction contributions at the zenith angle of 0 are established by the least squares fit. The analysis of spherically layering calculated results shows that the variation of atmospheric path delay (especially wet term) with zenith angle obeys well the secant law.Comparisons of different correction models indicate that our algorithms give better correction results with smaller rmsdeviations.
【Fund】: 国家教育委员会留学回国人员项目 航天技术有关项目
【CateGory Index】: P228.4
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