期刊
METROLOGIA
卷 57, 期 3, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1681-7575/ab7c54
关键词
primary frequency standard; atomic clock; GNSS frequency comparison; cold atoms
资金
- National Science Foundation
We report the first accuracy evaluation of NRC-FCs2, an atomic fountain clock developed at the National Research Council Canada. The short term stability at high atomic density is 1.1 x 10(-13) at 1 second of averaging time. The typical overall fractional type B uncertainty is 2.3 x 10(-16). GNSS-based frequency comparisons of NRC-FCs2 with the SI second, as reported by the BIPM over fourteen months, give a fractional frequency difference of -2.4(3.7) x 10(-16).
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