测绘学报 ›› 2024, Vol. 53 ›› Issue (5): 869-878.doi: 10.11947/j.AGCS.2024.20230353

• 大地测量学与导航 • 上一篇    下一篇

北斗实时百皮秒级单差时频同步方法

施闯1(), 宋伟2,3, 郑福1,4(), 王浩源1, 王玉琢5, 张爱敏5, 唐卫明6   

  1. 1.北京航空航天大学卫星导航与移动通信融合技术工业和信息化部重点实验室,北京 100083
    2.中国农业大学信息与电气工程学院,北京 100083
    3.农业农村部农机作业监测与大数据应用重点实验室,北京 100083
    4.北京航空航天大学前沿科学技术创新研究院,北京 100083
    5.中国计量科学研究院,北京 100029
    6.武汉大学卫星导航定位技术研究中心,湖北 武汉 430079
  • 收稿日期:2023-09-03 修回日期:2024-05-14 发布日期:2024-06-19
  • 通讯作者: 郑福 E-mail:shichuang@buaa.edu.cn;fzheng@buaa.edu.cn
  • 作者简介:施闯(1968—),男,博士,教授,博士生导师,主要从事卫星定位导航授时理论与方法研究。E-mail:shichuang@buaa.edu.cn
  • 基金资助:
    国家自然科学基金(42227802);云南省科技项目(202102AE090051);国家重点研发计划(2023YFB3906501)

BDS real-time 100 picosecond level single difference time and frequency synchronization method

Chuang SHI1(), Wei SONG2,3, Fu ZHENG1,4(), Haoyuan WANG1, Yuzhuo WANG5, Aimin ZHANG5, Weiming TANG6   

  1. 1.Laboratory of Navigation and Communication Fusion Technology, Ministry of Industry and Infomation Technology, Beihang University, Beijing 100083, China
    2.College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
    3.Key Laboratory of Agricultural Machinery Monitoring and Big Data Application, Ministry of Agriculture and Rural Affairs, Beijing 100083, China
    4.Research Institute for Frontier Science, Beihang University, Beijing 100083, China
    5.National Institute of Metrology, Beijing 100029, China
    6.GNSS Research Center, Wuhan University, Wuhan 430079, China
  • Received:2023-09-03 Revised:2024-05-14 Published:2024-06-19
  • Contact: Fu ZHENG E-mail:shichuang@buaa.edu.cn;fzheng@buaa.edu.cn
  • About author:SHI Chuang (1968—), male, PhD, professor, PhD supervisor, majors in the theory and methods of satellite positioning, navigation and timing. E-mail: shichuang@buaa.edu.cn
  • Supported by:
    The National Natural Science Foundation of China(42227802);The Science and Technology Program of Yunnan Province, China(202102AE090051);The National Key Research and Development Program of China(2023YFB3906501)

摘要:

高精度时频传递与时间同步服务已成为全球导航卫星系统应用领域的研究热点,国内外学者围绕GNSS高精度时频同步模型算法及相关应用等方面开展了诸多研究。本文提出基于载波相位的差分高精度时间传递模型,实现基于北斗卫星导航系统的实时百皮秒级单差时频同步。以中国计量科学研究院的光纤链路为参考,北斗时间同步精度优于时频同步系统的实时秒脉冲时间同步精度优于100 ps;在7 d的测试时段内,链路的时间稳定度优于70 ps;链路频率万秒稳定度可达10-15量级,频率长期稳定度可达10-16量级。利用BDS进行单差时频同步的频率稳定度与GPS相当,对开展BDS在时频领域的下一步推广应用提供重要的参考意义。

关键词: BDS, 载波相位单差, 精密时频传递, 实时时间同步

Abstract:

High precise time-frequency transfer and time synchronization services have become a research focus in GNSS applications. Scholars have conducted numerous studies on time-frequency synchronization models, algorithms and related applications. We propose adifferential precise time transfer model based on carrier phase observations, and establish a BeiDou navigation satellite system real-time 100 picosecond level differential time and frequency synchronization system. With the time transfer results of the fiber optic links as reference, differential precise time and frequency synchronization performance is validated. the standard deviation of the BDS real-time pulse per second results is better than 100 ps. What's more, the time deviation of the time link within 7 days is better than 70 ps. In terms of frequency stability, modified Allan deviation of 104 seconds can reach the level of 10-15, and the long-term frequency stability reaches the level of 10-16. Additionally, the frequency stability of BDS is comparable to that of GPS, which is of valuable significance for further expanding the application of BDS in the time and frequency community.

Key words: BDS, carrier phase single difference, precise time and frequency transfer, real-time time synchronization

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