Precise point positioning with mixed use of time-differenced and undifferenced carrier phase from multiple GNSS

Wenkun Yu, Xiaoli Ding, Wu Chen, Wujiao Dai, Zhonghai Yi, Boya Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)


A multi-GNSS kinematic precise point positioning (PPP) approach that is based on the mixed use of time-differenced and undifferenced carrier phase observations is presented. The approach reduces the number of constant parameters, such as ambiguities and hardware biases, and mitigates quasi-constant systematic errors including residual atmospheric refractions and multipath effects. The effectiveness and efficiency of the proposed approach are validated in some PPP tests of running and vehicle driving. The proposed method requires an accurate initial position. When that is available, up to 71% improvement in positioning accuracy can be achieved compared with traditional PPP. The proposed approach is also computationally efficient, especially for high-rate positioning applications.

Original languageEnglish
Pages (from-to)809-818
Number of pages10
JournalJournal of Geodesy
Issue number6
Publication statusPublished - 1 Jun 2019


  • Multi-GNSS
  • Precise point positioning (PPP)
  • Systematic errors
  • Time-differenced carrier phase (TDCP)

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology
  • Computers in Earth Sciences

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