基于GNSS载波相位的守时系统远程性能评估方法研究  

Remote Evaluation Method of Time Keeping System Performance Based on GNSS Carrier Phase

作　　者：施敏琳 张向波[1,3] 赵当丽 孙保琪[1,2,3] 武建锋[1,2,3] SHI Minlin;ZHANG Xiangbo;ZHAO Dangli;SUN Baoqi;WU Jianfeng(National Time Service Center,CAS,3 East-Shuyuan Road,Xi’an 710600,China;University of Chinese Academy of Sciences,A19 Yuquan Road,Beijing 100049,China;Key Laboratory of Time and Frequency Primary Standards,CAS,3 East-Shuyuan Road,Xi’an 710600,China)

机构地区：[1]中国科学院国家授时中心,西安市710600 [2]中国科学院大学,北京市100049 [3]中国科学院时间频率基准重点实验室,西安市710600

出　　处：《大地测量与地球动力学》2024年第3期251-256,共6页Journal of Geodesy and Geodynamics

基　　金：中国科学院“西部青年学者”项目(XAB2021YN26)。

摘　　要：为测试在建守时系统性能,提出基于GNSS载波相位的远程评估方法,并开展实验验证。以国家标准时间UTC(NTSC)为参考,基于西安和北京地区4个测站连续15 d的GNSS观测数据,分别采用PPP和载波相位共视(PCV)法解算得到待测守时系统相对UTC(NTSC)的时间偏差,然后对待测守时系统的相对频率偏差、频率稳定度等关键指标进行分析。结果表明,PCV和PPP时间传递链路的系统误差小,时间传递准确度高,采用PCV和PPP时间传递可准确测量相距较远的守时系统的频率稳定度、相对频率偏差等特性,可为下一步国产守时系统性能远程测试打下坚实基础。To test the performance of an under construction time keeping system,we propose a remote evaluation method based on GNSS carrier phase and conduct experimental verification.Taking the national standard time UTC(NTSC)as reference,and based on the GNSS observation data of four stations in Xi’an and Beijing for a continuous 15 days,we use PPP and carrier phase common-view(PCV)methods to calculate the time deviation of time keeping system relative to UTC(NTSC).Then,we analyze the relative frequency deviation and frequency stability of time keeping system.The results show that the system error of PCV and PPP time transfer links is small,and the accuracy of time transfer is high.The PCV and PPP time transfer can accurately measure the frequency stability and relative frequency deviation of time keeping systems that are far away from each other.The research results can lay a solid foundation for the remote evaluation of time keeping system performance.

关 键 词：GNSS 精密单点定位 载波相位共视 频率稳定度 相对频率偏差 

分 类 号：P228[天文地球—大地测量学与测量工程]