卫星双向定时精度分析  

Precision Analysis of Satellite Two-way Timing

作　　者：李保东 刘利[1,2] 居向明[3] 时鑫 朱陵凤 

机构地区：[1]北京市5136信箱,北京100094 [2]中国科学院动力大地测量学重点实验室,武汉430077 [3]海军蚌埠士官学校,蚌埠233012

出　　处：《时间频率学报》2010年第2期129-133,145,共6页Journal of Time and Frequency

基　　金：国家高技术研究发展计划(863计划)资助项目(2009AA12Z328);中国科学院动力大地测量学重点实验室开放基金资助项目(L09-04)

摘　　要：介绍了Compass卫星双向定时的基本原理,在讨论双向定时计算模型的基础上,给出了考虑Sagnac效应项的详细计算模型,并计算了Sagnac效应项在几个代表性地区的影响,结果表明:对于距离中心站较远地区的用户,这种影响可达几十个纳秒。最后,对Compass卫星双向定时理论精度进行了分析,并采用几个地区的试验结果进行了验证。The theory of compass satellite two-way timing is introduced in this paper.A specific calculating model which takes the Sagnac correction into consideration is given,based on a discussion on the former calculation model of two-way timing.Then the Sagnac effects in several representative areas are analyzed.The results show that the Sagnac correction reaches dozens of nano-seconds if the user＇s position is far from the centre station.At last,the precision of compass satellite two-way timing is analyzed and the precision is verified with some tests conducted in several districts.

关 键 词：卫星导航系统 时间 双向定时 

分 类 号：P128.15[天文地球—天体测量]