摘要
卫星导航系统发展不同时期、不同阶段的主钟时差信息的稳定性决定了系统时间归算效果。稳定的主钟时差信息是确保卫星导航系统不同阶段服务平稳过渡的前提。本文以卫星导航系统为例，针对两台原子钟其中一台主钟发生调频操作而导致两台主钟时差信息不平滑问题，提出了一种基于频率补偿的时差信息处理方法，以天为周期进行频率补偿后的时差信息内符合拟合精度，与外符合预报精度都得到了较好的改善，时差信息更加平滑，有利于实现卫星导航系统的平稳过渡。
The time reduction effect of satellite navigation system is decided by the stability of master clocks in different sys- tem development periods and phases. The stability of master clock time difference information is a prerequisite to the smooth tran- sition of service from one system development phase to another. In this paper, a time difference information processing method based on frequency compensation is provided to solve the unsmooth time difference information problem of two master clocks oc- curring when one of the two clocks makes frequency adjustment in satellite navigation system. After the frequency compensation is provided in the period of one day, both the internal fitting precision and external predicting precision of time difference informa- tion are improved well, and the time difference information becomes smoother, which is helpful to the smooth transition of satellite navigation system.
出处
《测绘科学与工程》
2017年第2期73-78,共6页
Geomatics Science and Engineering
关键词
卫星导航系统
频率补偿
时差信息
平稳过渡
satellite navigation system
frequency compensation
time difference information
smooth transition
