采用同步计时提高GPS钟的时间脉冲输出精度

Enhancing the GPS Clock's Time Pulse Precision By Adopting Synchronons Timing

全球定位系统GPS (GlobalPositioningSystem)是美国研制的导航、授时和定位系统。论述了采用GPS时间同步技术 ,实现GPS钟输出时间脉冲精度小于 10 -6s的方法。指出仅用软件计时 ,GPS钟输出时间脉冲精度将大于 10 -5s;而采用软件、硬件相结合的GPS时间同步技术 ,能充分利用单片机的资源 ,弥补软件计时的不足 ,从而大幅度提高了GPS钟时间脉冲的输出精度 (达到 0 5× 10 -7s)。

The Global Positioning System(GPS) is studied and developed by America.It is the system of navigation,orientation and giving the right time.This paper describes that the output precision of the GPS Clock's time pulse is within 10 -6s after adopting technology of synchronous timing.On the other hand,the output preciseness of the GPS Clock's time pulse would be over 10 -5s if just timing by software.One can make full use of SCM's resource and compensate deficiency of software timing by synchronous-timing technology of combining software with hardware.So the output preciseness of the GPS Clock's time pulse is greatly enhanced (T=0.5×10 -7s).