【作者】 姜萌； 董绍武； 武文俊； 宋会杰； 屈俐俐； 王威雄；

【Author】 JIANG Meng;DONG Shao-wu;WU Wen-jun;SONG Hui-jie;QU Li-li;WANG Wei-xiong;National Time Service Center, Chinese Academy of Sciences;University of Chinese Academy of Sciences;Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Chinese Academy of Sciences;School of Astronomy and Space Science, University of Chinese Academy of Sciences;

【机构】 中国科学院国家授时中心； 中国科学院大学； 中国科学院时间频率基准重点实验室； 中国科学院大学天文与空间科学学院；

【摘要】 利用统计方法的时间尺度算法能最大限度消除单台原子钟噪声影响而得到最优的时间尺度,通常情况下,其稳定度优于单台原子钟所给出的时间尺度。随着对精密时间信号应用需求的提升,一些外场台站在拥有原子钟数量较小的情况下需要其独立的时间尺度,以满足无线站、数字时间服务及频率测量服务等需求。鉴于此,本文基于好的钟是可预测的钟的思想,采用了指数滤波方式计算钟组时间尺度。首先,分别以氢钟组和铯钟组作为研究对象,采用指数滤波方法实时预报各台原子钟的权重和速率,基于该时间尺度算法分别产生氢铯两种原子时间尺度。同时,对各钟组产生的时间尺度进行讨论和分析。结果表明,该算法所产生的铯钟组和氢钟组时间尺度在8小时的稳定度分别达2.55e-14、9.80e-15,可满足以上需求。更多还原

【Abstract】 Time scale algorithm using statistical methods, and can eliminate the influence of single atomic clock noise to obtain the optimal time scale. The stability is better than the time scale given by each atomic clock. With the increase in demand for precise time signals, some out-field stations need their independent time scale when the number of atomic clocks is small, and to meet the needs of wireless stations, digital time services and frequency measurement services. For that reason, this paper based on the idea that a good clock is a predictable clock, the time scale of atomic clock groups are computed by exponential filtering. First, Hydrogen maser and Cesium clocks assemble is used as the object of study and the exponential filtering method is adopted to predict the weights and rates of each atomic clock in real time, and then two time scales are generated for Hydrogen masers and Cesium clocks respectively. Then discussion and analysis of the time scale produced by each clock group is done. The results show that the time scale of the Hydrogen maser and Cesium clocks assemble produced by this method at eight hour’s stability is 9.80 e-15, 2.55 e-14, respectively.更多还原