基于北斗三号的多区域实时动态授时服务系统  

A Multi-Region Real-Time Kinematic Time Service System Based on BeiDou-3

作　　者：孙保琪[1,2,4] 韩蕊 刘嘉伟 张喆 王格[1,2,4] 陈亮[1,2] 刘娅 杨旭海 SUN Bao-qi;HAN Rui;LIU Jia-wei;ZHANG Zhe;WANG Ge;CHEN Liang;LIU Ya;YANG Xu-hai(National Time Service Center, Chinese Academy of Sciences, Xi'an 710600, China;Key Laboratory of Precise Positioning and Timing Technology, Chinese Academy of Sciences, Xi'an 710600,China;School of Civil and Architectural Engineering, Shandong University of Technology, Zibo 255049, China;School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院精密导航定位与定时技术重点实验室,西安710600 [3]山东理工大学建筑工程学院,淄博255049 [4]中国科学院大学天文与空间科学学院,北京100049

出　　处：《导航定位与授时》2021年第4期45-52,共8页Navigation Positioning and Timing

基　　金：国家自然科学基金面上项目(12073034);青年科学基金项目(12003041);中科院西部之光“一带一路”团队项目(XAB2018YDYL01);iGMAS分析中心项目;国家科技基础条件平台-国家空间科学数据中心。

摘　　要：面向新一代移动通信和物联网等领域对高精度、低成本授时的需求,针对典型的实时动态授时服务只能单区域覆盖的问题,提出了一种基于北斗的多区域实时动态精密授时服务系统。该系统由标准时间、时间基准站、高精度时间频率实时传递链路、数据中心和时间用户等部分组成,可实现标准时间实时动态授时服务的全国多区域覆盖。依托中国科学院国家授时中心时间频率和卫星导航平台建立了原型系统,并基于多天的北斗三号新体制信号观测数据开展了试验验证。试验结果表明,短基线授时精度优于0.2ns,频率稳定度万秒稳在10-15量级;零基线授时精度可达0.02ns,频率稳定度万秒稳在10-16量级。基于北斗的多区域实时动态精密授时服务系统具备技术可行性,可为北斗精密时间应用提供参考。In order to meet the needs of high-precision and low-cost time service in the fields of new generation of mobile communications and Internet of Things,a multi-region real-time kinematic precise time service system based on BeiDou is proposed to solve the problem that the general real-time kinematic timing service covers only a small area.The system consists of standard time,time base station,real-time high-precision time and frequency transfer link,data center and time user,etc.,which can realize multi-region coverage for real-time kinematic timing service of standard time.Relying on the time and frequency resources and the satellite navigation platform of National Time Service Center,Chinese Academy of Sciences,a prototype system is established,and the experimental test is carried out based on the multi-day observation data of BeiDou-3 satellites.The test results show that the short-baseline timing uncertainty is better than 0.2ns,and the frequency stability is stable by the order of 10-15 in ten thousand seconds;the zero-baseline timing uncertainty can reach 0.02ns,and the frequency stability is stable by the order of 10-16 in ten thousand seconds.The proposed multi-region real-time kinematic precise time service system based on BeiDou is feasible in technology,which could be helpful for BeiDou precise time applications.

关 键 词：北斗三号 精密授时 时间基准站 实时动态 短基线 

分 类 号：P228.4[天文地球—大地测量学与测量工程]