守时钟组中氢钟频率可预报性分析  

Analysis on frequency predictability of hydrogen maser in time-keeping clock

作　　者：王东旭 武文俊[1,2] WANG Dong-Xu;WU Wen-Jun(National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,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]中国科学院大学天文与空间科学学院,北京100049

出　　处：《时间频率学报》2023年第1期32-39,共8页Journal of Time and Frequency

基　　金：中国科学院“西部之光”人才培养计划“西部青年学者”资助项目(XAB2017A06)。

摘　　要：氢钟和铯钟是国际原子时的主要守时钟,在2014年国际权度局(BIPM)改进ALGOS预报和权重算法之后,具有稳定频率漂移和良好可预测性的氢钟逐渐在国际原子时计算中占据主导地位。分析研究201809/202108三年内BIPM发布的中国科学院国家授时中心(NTSC)氢钟频率及漂移数据,对国家授时中心氢钟稳定性及可预报性进行量化评估,结果表明:频率漂移标准差小于0.1 ns/d/30 d且频率预测误差均方根小于0.2 ns/d的氢钟可以在自由原子时计算中长时间取得较高权重。Hydrogen masers and cesium clocks are main clocks for International Atomic Time(TAI).Since the International Bureau of Weights and Measures(BIPM)improved the forecasting and weighting algorithm of ALGOS in 2014,hydrogen masers with stable frequency drift and good predictability gradually play a leading role in TAI calculation.By analyzing and studying the hydrogen masers frequency and drift data of the National Time Service Center(NTSC),Chinese Academy of Sciences released by the BIPM in the three years from September of 2018 to August of 2021,the stability and predictability of the hydrogen masers in NTSC were quantitatively evaluated.The results show that:Hydrogen masers with standard deviation of frequency drift less than 0.1 ns/day/30 day and root mean square of frequency prediction error less than 0.2 ns/day can obtain full weight in TAI calculation for a long time.

关 键 词：ALGOS算法 氢钟 频率漂移 频率稳定性 

分 类 号：TH714.14[机械工程—测试计量技术及仪器]