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Title: Methods for monitoring and correcting GPS-clock
Authors: Zeng, XJ
Yin, XG
Li, KK
Chan, WL 
Keywords: Clock oscillator
Global positioning system (GPS)
Power system
Protection relaying
Issue Date: 2002
Source: Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering, 2002, v. 22, no. 12, p. 41-46 How to cite?
Journal: Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering 
Abstract: 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.
ISSN: 0258-8013
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