高精度GPS时间信息的研究与应用  

Study and application of high precision GPS time information

作　　者：强成虎[1] 李铮[1] 郑铮[1] 王希东[2] 

机构地区：[1]北京航空航天大学电子信息工程学院 [2]91635部队

出　　处：《国外电子测量技术》2007年第3期68-70,共3页Foreign Electronic Measurement Technology

摘　　要：本文介绍了GPS系统传递高精度时间信息的技术原理,提出了用GPS时间信息锁定高稳定度晶体振荡器的方法,建立了Kalman滤波模型,在GPS信号失效时通过滤波估计保持晶振正常输出。通过性能指标测量、分析,结果验证了GPS晶体频率标准具备较高的频率准确度和稳定性,能够用于时间频率的测量基准。The transfer technique of high precision GPS time information was introduced. Based on the principle, a method of high stable oscillator disciplined by GPS 1PPS was presented. Because of GPS signal dropping off possibly, a model of Kalman filter was proposed to maintain the normal output. The result of the experiment and analysis proves that the discipline oscillator has high veracity and stability, and shows that it can be used for standard of time and frequency measurement reference.

关 键 词：GPS系统 高精度GPS时间信息 1PPS 伺服 KALMAN滤波 

分 类 号：TN91[电子电信—通信与信息系统]