北斗RDSS授时服务性能评估  

Performance evaluation of RDSS timing service for BeiDou system

作　　者：王冬霞 郭睿 辛洁 黄双临 袁运斌 WANG Dongxia;GUO Rui;XIN Jie;HUANG Shuanglin;YUAN Yunbin(Beijing Satellite Navigation Center,Beijing 100094,China;State Key Laboratory of Geodesy and Earth’s Dynamics,Wuhan 430077,China)

机构地区：[1]北京卫星导航中心,北京100094 [2]大地测量与地球动力学国家重点实验室,武汉430077

出　　处：《测绘科学》2019年第8期132-141,148,共11页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(61603397,41874043,41204022,41374038);大地测量与地球动力学国家重点实验室开放基金资助项目(SKLGED2017-3-3-E)

摘　　要：针对现有卫星导航系统RDSS授时服务研究较少的问题,该文结合北斗实测数据,提出采用时间序列分析法评估北斗RDSS单向和双向授时服务性能,系统地研究了单向授时原理和双向授时原理,并介绍了北斗RDSS实测数据和精度评估方法。通过分析钟差总体情况、零值分段情况、噪声情况及授时精度等,得出结论:RDSS单向授时精度小于30ns,RMS平均值为6.81ns;RDSS双向授时精度小于20ns,RMS平均值为3.60ns;各波束的单向授时和双向授时数据均存在周期切换现象,且单向授时数据存在分层现象。该结论可用于RDSS系统差补偿,为北斗系统差一致性提供参考,进而提高系统服务精度。According to the rare existing researches of radio determination satellite service(RDSS)timing service of satellite navigation system,this article evaluated RDSS timing service performance of one-way and two-way using the time series analysis method.Moreover,this paper systematically studied the one-way timing and two-way timing principle,and introduced BeiDou RDSS measured data and accuracy evaluation method.By analysing the clock error total curve,the mean value segment,noise situation and timing accuracy,we had the conclusions:RDSS one-way timing accuracy was less than 30 ns,mean of RMS was 6.81 ns;RDSS two-way timing accuracy was less than 20 ns,mean of RMS was 3.60 ns;There existed period switching phenomenon of timing data of one-way and two-way in each beam,and stratification of one-way timing data.This conclusion could be used for the difference compensation of RDSS system,which could provide reference for the clock error consistency of BeiDou system,and then improve the system service precision.

关 键 词：RDSS 单向授时 双向授时 性能评估 

分 类 号：P228.4[天文地球—大地测量学与测量工程]