基于iGMAS的北斗导航卫星原子钟性能评估  

Evaluation of BDS Atomic Frequency Standard Based on iGMAS

作　　者：廉吉庆 张文玺 张金海[1] 王世伟[1] 陆昉[1] 翟浩[1] 崔敬忠[1] 刘志栋[1] LIAN Jiqing;ZHANG Wenxi;ZHANG Jinhai;WANG Shiwei;LU Fang;ZHAI Hao;CUI Jingzhong;LIU Zhidong(Science and Technology on Vacuum Technology and Physics Laboratory,Lanzhou Institute of Physics,Lanzhou 730000,China)

机构地区：[1]兰州空间技术物理研究所真空技术与物理重点实验室,兰州730000

出　　处：《真空与低温》2022年第5期609-614,共6页Vacuum and Cryogenics

基　　金：重点实验室基金(6142207200101)。

摘　　要：星载原子钟是导航卫星系统的关键设备,星载原子钟的性能评估对导航误差分析及原子钟产品性能改进有重要参考价值。介绍了星载原子钟的主要性能参数和iGMAS钟差产品。基于iGMAS的钟差数据,分别对北斗卫星导航系统的铷原子钟和氢原子钟的准确度、漂移率和稳定度进行了评估和对比。结果表明,北斗三号原子钟的性能比北斗二号的明显提升,其中氢原子钟的长期性能更好,10天稳定度和天漂移率普遍达到10^(-15)量级。Space atomic frequency standard(AFS)is the key equipment of Global Navigation Satellite System(GNSS),and the performance evaluation of AFS has important value for navigation error analysis and optimization of space AFS.In this paper,the performance parameters of space atomic clock,the clock products of international GNSS monitoring and assessment system(iGMAS)were introduced.The frequency accuracy,daily drift and stability of space rubidium atomic clocks and passive hydrogen masers(PHM)on Beidou Navigation Satellite System(BDS)were evaluated and analyzed.The results show that the performance of BDS-3 AFS is significantly improved compared with BDS-2 AFS.The PHM has better long-term performance,10 days stability and frequency daily drift of which generally reach the order of 10^(-15).

关 键 词：全球连续监测评价系统 原子钟 北斗导航系统 稳定度 准确度 频率漂移 

分 类 号：TP701[自动化与计算机技术—检测技术与自动化装置] V474.25[自动化与计算机技术—控制科学与工程]