Application and evaluation of a GPS multi-antenna system for dam deformation monitoring

Xiufeng He, Guang Yang, Xiaoli Ding, Yongqi Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

35 Citations (Scopus)


This paper describes GPS multi-antenna device (one GPS receiver links multiple antennas) developed by authors, and the experimental results are presented. GPS has already proven to be an efficient tool for monitoring dam deformations and stability of high-risk slopes. It offers greater accuracy than other surveying techniques. However, GPS has its disadvantages when employing for slope and dam monitoring. The major drawback has been high cost due to large-scale GPS deployments are required in monitoring sites. The conventional GPS monitoring methods, where a permanent GPS receiver must be located at each point, have significant limitations of the cost. A new approach that a single GPS receiver links multiple antennas mounted at the monitoring points, has been employed to solve these problems in this paper. A dedicated switching device has been developed by authors for this approach. Field testing results show that the dedicated switching device for GPS multi-antenna system has excellent performances. Post-processing positioning accuracy is around 1-2 mm for the deformation monitoring of the Xiaolangdi dam on the Yellow River.
Original languageEnglish
Pages (from-to)1035-1039
Number of pages5
JournalEarth, Planets and Space
Issue number11
Publication statusPublished - 1 Jan 2004


  • Deformation monitoring
  • GPS
  • Multi-antenna
  • Positioning
  • Switch

ASJC Scopus subject areas

  • Geology
  • Space and Planetary Science


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