一种MEO卫星星地时间同步的新方法

详细信息

A New Method for Clock Synchronization of MEO Satellite

School of Electronic Engineering,Univ. of Electron. Sci. & Tech. of China Chengdu 610054

摘要: 在双向时间比对法的基础上,采用最小二乘法拟合多项式的方法对比对数据进行处理,获得了MEO卫星与地面相对运动引起的钟差的变化曲线;对多项式求导获得了卫星在地面观测站过顶点上的最小钟差值,实现了卫星时钟的星地时间同步。该方法可以应用于MEO卫星导航定位系统中。
- 时间同步 /
- 双向比对 /
- 最小二乘 /
- MEO卫星
Abstract: Based on the two-way time transfers, this paper presents a method processing contrast value that adopts a quasi-polynomial formed by least square estimation, in order to obtain the varying law of the clock difference between satellite and ground station because of the relative move between satellite and ground. Then the accurate clock difference when the satellite is over the top of ground station can be obtained through the differential of the polynomial, thereby the synchronization of satellite clocks is realized. This method may be applied to MEO satellite navigation and position system.
- clock synchronization /
- two-way time transfers /
- least square estimation /
- MEO satellite