1998～2001年国家授时中心(NTSC)铯原子钟运转情况

主要介绍了用于保持中国科学院国家授时中心 (原陕西天文台 )时间尺度的 6台铯原子钟 (代号分别为 :Cs0 7、Cs0 8、Cs1 1、Cs1 6、Cs1 7、Cs1 8)的运行情况。 6台铯原子钟自 1 997年下半年正式给BIPM (国际权度局 )提供数据 ,参加国际原子时(TAI)计算至今已达 5年之久 ,在此期间 ,除Cs1 8因铯束管故障在 1 999年返回美国检修外 ,其它 5台钟运行情况良好。详细介绍、分析每台钟在 1 998～ 2 0 0 1年期间的整体特性、不同采样间隔下的稳定度比较、速率漂移以及它们在TAI系统中的取权情况。通过分析比较 ,使我们对每台钟的运行情况作出恰如其分的评价 ,以便更好地利用国家授时中心的钟资源 ,做好守时和授时工作。

The Operating Situations of Cs Clocks in NTSC During 1998～ 2001

The operating situations of six Cs clocks (Cs07,Cs08,Cs11,Cs16,Cs17,Cs18) used for time keeping in the National Time Service Center(NTSC) are introduced. These six Cs clocks began to contribute to the computation of TAI in the late 1997. During the past five years, five clocks have been operating normally and continuously except the Cs18 which was returned to The United States in 1999 for being repaired. In this paper, the summarized characteristics, clock stabilities with different sample times, situations of rate drifts and clock weights in TAI computation are introduced and analyzed in detail for each individual clock.It is hoped to make good use of the Cs clock resources and improve the time keeping work through overall analysis and evaluation of operating situations for each clock.