NIM5驾驭氢钟守时能力分析  

Timekeeping capability analysis of steering hydrogen maser to NIM5

作　　者：王玉琢[1,2] 徐倩 刘昆 房芳[1,2] 张爱敏 Wang Yuzhuo;Xu Qian;Liu Kun;Fang Fang;Zhang Aimin(National institute of metrology,Beijing 100029,China;Key Laboratory of State Administration for Market Regulation(Time Frequency and Gravity Primary Standard),Beijing 100029,China)

机构地区：[1]中国计量科学研究院,北京100029 [2]国家市场监管重点实验室(时间频率与重力计量基准),北京100029

出　　处：《仪器仪表学报》2024年第2期129-136,共8页Chinese Journal of Scientific Instrument

基　　金：国家重点研发计划项目(2021YFB3900701);国家市场监督管理总局科技计划项目(2023MK178);国家自然科学基金国家重大科研仪器研制项目(42227802)资助。

摘　　要：时间频率量值源头的独立自主是建设我国综合PNT体系的重要基础。为进一步评估基于我国国家秒长基准的原子时标守时能力,利用改进的有限脉冲响应钟差预测与频率调控方法,对激光冷却铯原子喷泉钟与氢钟的频差实测数据进行后处理,分别产生了自主型时标和溯源型时标。通过国际原子时合作链路将两个时标与协调世界时进行了长期比对实验,结果表明:2021年12月~2022年12月期间,两个时标的时间偏差均优于±4 ns、频率稳定度均优于8×10^(-16)/5 d。The independence of time and frequency standards is an important basis for the comprehensive PNT system construction in China.To further evaluate the timekeeping capability of the atomic time scale based on the national primary frequency standard,the improved FIR clock difference prediction and frequency control method is used to post-process the frequency difference of the cesium atomic fountain clock relative to the hydrogen maser.By post-processing,the autonomous time scale and traceable time scale are generated respectively.The two-time scales are compared with UTC by the international atomic cooperation link.The long-term experimental results show that both of the time differences between the two-time scales and UTC are less than±4 ns and the frequency stability is less than 8×10^(-16)/5 d from December 2021 to December 2022.

关 键 词：铯原子喷泉钟 秒长基准 原子时标 原子钟 驾驭算法 

分 类 号：TH761.2[机械工程—仪器科学与技术]