Data processing for GPS precise point positioning

Cong Wei Hu, Wu Chen, Shan Gao, Yong Qi Chen, Xiaoli Ding

Research output: Journal article publicationJournal articleAcademic researchpeer-review

13 Citations (Scopus)


In the data processing of the precise point positioning (PPP), the un-difference method is commonly used. However, GPS measurements can be differenced with satellites or different observation epochs. In theory, these differencing approaches should be mathematically equivalent. The positioning performance of different PPP data models, including un-difference (UD), satellite difference (SD), time difference (TD) and time-satellite difference (TSD), is examined using the 24 h GPS observation. The positioning accuracy, convergence of ambiguity, and tropospheric delay estimation with these four models are compared with each other.
Original languageEnglish
Pages (from-to)124-131
Number of pages8
JournalTransactions of Nanjing University of Aeronautics and Astronautics
Issue number2
Publication statusPublished - 1 Jun 2005


  • Error model
  • GPS
  • Precise point positioning

ASJC Scopus subject areas

  • Aerospace Engineering


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