Ambiguity online estimation by combining dual-frequency phase and carrier smoothed code measurements : performance on short baselines

D.F. Huang, Xiaoli Ding, Y.Q. Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review


For both static and kinematic relative positioning with GPS, the success of baseline resolution depends closely on the reliable fixing of integer ambiguities of carrier phase measurements. Low noise code correlated dual-frequency GPS receivers offer accurate pseudo-range measurements on both carrier frequencies. With the help of a combination of code and carrier phase measurements, wide-lane ambiguities can be easily determined and used for the improvement of ambiguity resolutions on both L1 and L2 frequencies. A carrier smoothing technique is utilized to eliminate the noise of code measurements. Baselines ranging from 1.5 km to 48 km are used to test the proposed method.
Original languageEnglish
Pages (from-to)263-272
Number of pages10
JournalSurvey Review
Issue number282
Publication statusPublished - 2001

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)
  • Computers in Earth Sciences
  • Civil and Structural Engineering

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