全球导航卫星系统时间精度分析

Time Accuracy Analysis of GNSS

全球导航卫星系统具有独立的时间参考系统,即GNSS时间,并溯源至UTC时间。GNSS时间精度参数不仅影响定位和授时的精度,也影响不同GNSS系统之间时间偏差的计算和预报,进而对GNSS系统的互操作性产生影响。本文对GNSS时间标度的产生和维持进行了分析,并通过分析给出了其精度估计结果。

GNSS time is an independent time reference system,which can be traced back to UTC time.The time accuracy parameters of GNSS not only affect the accuracy of positioning and timing,but also affect the calculation and prediction of time deviation between different GNSS systems,thus they affect the interoperability of GNSS systems.In this paper,the generation and maintenance of GNSS time scale are analyzed,and the accuracy estimation results are given.