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《Science of Surveying and Mapping》 2011-03
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Test and choice of clock synchronization model based on GPS

JIA Zan-jie,ZHU Yu,SHI Xian-long,GAO Yun-fei(63883 Troops,Henan Luoyang 471000,China)  
Since GPS has been an effective and convenient means to transfer precise time,clock synchronization technique based on GPS is more popular and important than ever before in many auto-control fields with computers.The theory of clock synchronization between GPS and high-precision clock built in computers was introduced in this paper,then first-order and second-order mathematical model of clock synchronization were given.The analysis results of the tests with real raw data showed that first-order model has advantage over second-order model in precision and stabilization.Several parameters correlated with the precision of clock synchronization results were analyzed with tests.Lastly,the precision of the extrapolation synchronization was analyzed and results showed that after eliminating the spikes of the raw data,the weighted-mean method could obtain a synchronization precision of 50 microseconds in an hour.
【CateGory Index】: P228.4
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