卫星双向比对中地面站设备时延校正方法  

A Correction Method of Time Delay for Ground Station Equipment Based on Two-Way Satellite Time Transfer

作　　者：叶玲玲[1] 楼杨[1] 孙朝斌[1] 丁冉[1] 郭海生[1] 

机构地区：[1]中国卫星海上测控部,江苏江阴214431

出　　处：《计算机测量与控制》2014年第2期572-574,共3页Computer Measurement &Control

摘　　要：针对卫星双向比对中的地面站设备时延校正需求,文中提出一种基于同源零基线法的校正方法,采用便携式收发设备,在两地面站进行时间同步,以此来抵消设备时延,并对该方法的测量不确定度进行分析;实验结果表明,该方法可使卫星双向比对的对时精度达到1.5 ns以下,有效减小了设备时延对卫星双向比对精度的影响,对于高精度时间比对具有一定的实际意义。For correcting the time delay of ground station equipment on two--way satellite time transfer （TWSTT）, the paper proposes a correction method based on homologous tO zero baseline, using a portable transceiver equipment, offsetting the device time delay by time synchronization between the two ground stations, and the measurement uncertainty of the method is analyzed. The experimental results show that the precision of the TWSTT system can be ensured in 1. 5ns with the method, the influence of the device time delay on TWSTT is re- duced effectively. It has a certain practical significance for the high--precision time synchronization.

关 键 词：卫星双向比对 时延 校正 

分 类 号：TN98[电子电信—信息与通信工程]