Volume 35 Issue 1
Jan.  2010
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ZHANG Xiaohong, GUO Fei, LI Xingxing, LIN Xiaojing. Study on Precise Point Positioning Based on Combined GPS and GLONASS[J]. Geomatics and Information Science of Wuhan University, 2010, 35(1): 9-12.
Citation: ZHANG Xiaohong, GUO Fei, LI Xingxing, LIN Xiaojing. Study on Precise Point Positioning Based on Combined GPS and GLONASS[J]. Geomatics and Information Science of Wuhan University, 2010, 35(1): 9-12.
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Study on Precise Point Positioning Based on Combined GPS and GLONASS

  • 1School of Geodesy and Geomatics,Wuhan University,129 Luoyu Road,Wuhan 430079,China

Funds: 国家自然科学基金资助项目(40874017)；国家863计划资助项目(2006AA12Z325)；国家创新研究群体科学基金资助项目(40721001)
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  • Received Date: November 19, 2009
  • Revised Date: November 19, 2009
  • Published Date: January 04, 2010
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  • A combined PPP(Precise Point Positioning) mode is implemented using GPS and GLONASS observations.The performance of the combined GPS and GLONASS PPP was assessed using observations from one of the IGS tracking network(IRKJ) and the currently available precise orbit and clock products.The corresponding positioning accuracy and convergence time were compared between GPS-only and GPS/GLONASS combined precise point positioning.The results show that GLONASS has caused a slight impact on positioning accuracy and convergence time in case of more than 8~9 GPS satellites are tracked.However,when the number of available GPS satellites is not enough,especially is less than 4~5,adding a couple of GLONASS satellites can improve positioning accuracy and shorten convergence time significantly.
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