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《Journal of Nanjing University of Information Science & Technology(Natural Science Edition)》 2013-02
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Calculation scheme and accuracy test of ground-based GPS atmospheric water vapor in Yunnan

SUN Jihua1,2 WU Ping3,4 LIU Jianyu1 1 Yunnan Provincial Institute of Meteorological Sciences,Kunming 650034 2 Dali National Climatic Observatory of Yunnan Province,Dali 671003 3 Key Laboratory of Meteorological Disaster of Ministry of Education,Nanjing University of Information Science & Technology,Nanjing 210044 4 Gaochun Meteorological Administration of Jiangsu Province,Nanjing 211300  
Based on the analysis of the characteristics of atmospheric water vapor calculation scheme processed by GAMIT software,the results generated by two kinds of different calculation schemes are comparatively analyzed by using the ground-based GPS data of 6 meteorological stations in Yunnan province.The analysis and accuracy test are conducted by comparison with the radiosonde data.The results show that the two calculation schemes are quite different in the retrieved water vapor results.The precision of GPS water vapor is obviously improved after adopting the local model.The water vapor values derived from GPS are roughly in agreement with the radiosonde observations with a mean-root-square error less than 2mm,and the changing trends of them are basically the same.The study revealed that the retrieved water vapor generated by the ground-based GPS calculation scheme in the local model can be used in research business.
【Fund】: 公益性行业(气象)科研专项(GY-HY201006054 GYHY201006009);; 国家自然科学基金(41275095);; 云南省省院省校科技合作计划(2006YX39)
【CateGory Index】: P228.4;P426
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