Precise single epoch GPS positioning for deformation monitoring

Günther Retscher, Chi Ming Esmond Mok

Research output: Journal article publicationJournal articleAcademic researchpeer-review


Real-time kinematic GPS systems (RTK-GPS) are used nowadays for many different applications. In the case of deformation monitoring the position determination has to be performed separately for each epoch and the capability of these systems is currently being analysed in many research projects. On the other hand, a single epoch GPS processing algorithm combining the ambiguity function method (AFM) with robust least squares estimation has been introduced recently and can be applied for position determination in deformation monitoring. In this paper the two approaches are compared and results of field tests on large construction sites in Hong Kong are presented. Finally improvements of both methods leading to a combination of the two algorithms are discussed.
Original languageEnglish
Pages (from-to)221-222
Number of pages2
JournalZeitschrift fur Vermessungswesen
Issue number7
Publication statusPublished - 1 Dec 1999


  • Ambiguity function method
  • Comparison rtk-afm
  • Gps for continuous deformation monitoring
  • Otf ambiguity resolution
  • Real-time kinematic (rtk) gps
  • Single epoch processing algorithm

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Water Science and Technology


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