为了提高铷原子钟的远程时间溯源性能,在中国计量科学研究院TWOTFT链路的基础上,实施了对铷原子钟的高精密准实时驯服实验,驯服间隔分别为16,5,1min,实现了基于TWOTFT的远程时间溯源原理验证。实验结果表明:在远程时间溯源中,TWOTFT相比GNSS时间频率传递效果更优,且1min TWOTFT远程时间溯源效果最优,98.67%的时差绝对值在0.5ns内,时间稳定度和频率稳定度分别为2.5×10-11s·d-1和5.0×10-16d-1。
Abstract
To improve the remote time traceability performance of the rubidium atomic clock, the high-precision quasi-real-time disciplining experiments were implemented on the rubidium atomic clock based on the TWOTFT links of National Institute of Metrology (NIM). In the experiment, the disciplining intervals are 16min, 5min, and 1min, which realizes the verification of the principle of remote time traceability based on TWOTFT. The experimental results show that in remote time traceability, TWOTFT is more effective than GNSS time-frequency transfer, and the remote time traceability effect with a disciplining interval of 1 minute is the best, and 98.67% of the absolute values of the time differences are within 0.5ns, and the time stability and frequency stability are 2.5×10-11s·d-1 and 5.0×10-16d-1 respectively.
关键词
计量学 /
铷原子钟 /
远程时间溯源 /
光纤双向时间频率传递
Key words
metrology /
rubidium clock /
remote time traceability /
TWOTFT
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基金
国家重点研发计划(2017YFF0212001)
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