基于卫星双向法的时间比对系统构建与分析

为了实现高精度时间同步,采用了卫星双向法,对时间比对系统进行了构建,并对影响比对系统不确定度的因素进行了分析。卫星双向法即两个台站同步发送和接收时间信号,可消除传递路径引起的误差,如：卫星位置引起的误差、电离层和对流层修正误差、卫星转发器误差。分析表明：在所有不确定度影响因素中,发射与接收设备时延的不稳定性是最大影响分量,系统对时精度可控制在4ns以内。系统的构建为高精度时间同步提供了可操作的方法。

Establishment and Analysis on Time Synchronization Comparison System by Two-way Satellite

For the high-accuracy time synchronization,the two-way satellite(TWSIT) is adopted,the time synchronization comparison system is built,and the major facts of affecting the system uncertainty are analyzed.TWSIT means that the timing synchronizes transmission and reception of the two stations.It can eliminate the errors(such as satellite position error,ionospheric delay error,troposphere delay error and satellite transponder error) caused by transmission routes.The analysis shows that in all influence factors...