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《Editorial Board of Geomatics and Information Science of Wuhan University》 2003-04
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Precise Point Positioning Based on Undifferenced GPS Data

HAN Baomin 1 OU Jikun 1 (1 Institute of Geodesy and Geophysics, Laboratory of Dynamical Geodesy, Chinese Academy of Sciences, 174 Xudong Road, Wuhan, China, 430077)  
This paper first introduces the code and phase models used in precise point positioning (PPP) method, then the principle and simple procedure of PPP processing algorithm are introduced, and the main error sources of PPP method are presented. A lot of attentions are paid to the methods of quality control for PPP method. What's more, the estimation and interpolation of satellite clock errors, the consistence of data and solution and the accuracy that PPP method can attain are discussed. Last, an example of PPP is processed and the corresponding results are compared with the results obtained by using GPS double difference observations. The results show that the accuracy of PPP can attain cm-precision and is approximately equal to that of double difference with long baselines (1 000km).
【Fund】: 国家自然科学基金资助项目 (4 0 0 740 0 3 );; 中国科学院知识创新工程资助项目 (KZCX2 10 6)
【CateGory Index】: P228.4
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