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Method of Accurate Timing Based on GPS Technology

WANG Qing1,2,SONG Tie-cheng1,FENG Yuan2 (1.School of Information Science and Engineering,Southeast University,Nanjing 210096,China;2.ChangZhou UNICOM,Changzhou 213000,China)  
The structure of GPS accurate timing system and the accurate timing methods in static and dynamic condition are studied in this paper.In the static condition,the accurate timing is finished by pseudo and carrier phase and we get the related timing precision by simulation.In the dynamic condition,the lost-locked problem of the GPS signal makes low timing accuracy.In order to improve the timing accuracy enormously,the second-impulse and the high-precision crystal oscillator are used.Also by simulation,we analyze the effect on the timing accuracy when using the accessory high-precision crystal oscillator.
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