Methods for monitoring and correcting GPS-clock

Xiang Jun Zeng, Xiang Gen Yin, K. K. Li, Wai Lok Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

31 Citations (Scopus)


Infected by jamming-signal and losing satellite tracking, GPS-clock is difficult to satisfy the requirement of synchronous control with high reliability. Based on the precision interaid between high precision oscillator and GPS-clock, methods for monitoring GPS-clock by comparing to oscillator are proposed in this paper. The variance of GPS-clock and the accumulation error of oscillator are estimated with the presented model of minimum mean-square value. And methods for correcting GPS-clock on-line are developed. The device for high precision clock with high performance/price ratio is implemented. It has been applied in power system protection and control.
Original languageChinese (Simplified)
Pages (from-to)41-46
Number of pages6
JournalZhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering
Issue number12
Publication statusPublished - 1 Dec 2002


  • Clock oscillator
  • Global positioning system (GPS)
  • Power system
  • Protection relaying

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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