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《Chinese Journal of Geophysics》 2010-06
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The realization and analysis of GNSS network based real-time precise point positioning

LI Hao-Jun~1,WANG Jie-Xian~(1,2),CHEN Jun-Ping~3,HU Cong-Wei~(1,2),WANG Hu~1 1 Department of Surveying and Geo-informatics Engineering,Tongji University,Shanghai 200092,China 2 Key Laboratory of Modern Engineering Surveying,State Bureau of Surveying and Mapping,Shanghai 200092,China 3 Deutsches GeoForschungsZentrum-GFZ,14473,Potsdam, Germany  
Based on the regional GNSS (Global Navigation Satellite System) network,the realtime epoch-differenced values of relative clock are estimated using the algorithm of epoch-differential and satellite-differential derived model.On account of the character of precise realtime clocks,the estimation model of real-time precise point positioning is deduced by a satellite-differential algorithm.Comparing the epoch-differenced values of relative clock and the IGS final products,the accuracy can be at 0.08 ns.The hourly data was processed using the real-time precise point positioning algorithm based on the estimated real-time precise clocks.In static mode,the hourly positioning accuracy in the N、E and U directions are 1.47,3.62,4.09 cm respectively.The kinematic positioning accuracy in the N、E and U directions are 2.63,3.82,5.20 cm respectively.The accuracy of real-time solution is better than the precise point positioning using the IGS final orbits and clocks in the N,E and U three directions.
【Fund】: 国家自然科学基金项目(40974018);; 中国大陆构造环境监测网络工程项目(CMONOCⅡ-RJ-2008-005)资助
【CateGory Index】: P228.4
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