First comparison of primary frequency standards between Europe and Asia

M Fujieda,S Weyers,R Wynands,A Bauch,M Kumagai,T Gotoh,D Piester,M Hosokawa

doi:10.1109/freq.2007.4319217

First comparison of primary frequency standards between Europe and Asia

M Fujieda, S Weyers + Show 6 more

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https://doi.org/10.1109/freq.2007.4319217

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Publication Date: May 1, 2007

Citations: 16

Affiliation: National Institute of Information and Communications Technology, Physikalisch-Technische Bundesanstalt

#Comparison Of Frequency Standards #Primary Frequency Standards + Show 8 more

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Abstract

In December 2006, PTB and NICT simultaneously operated their caesium atomic fountain primary frequency standards, PTB-CSF1 and NICT-CsF1 for 15 days starting from MJD 54079. This was the first direct comparison of primary frequency standards between Europe and Asia. The fountains were compared to local H-masers and the frequency difference between the H-masers was determined directly by TWSTFT with frequency transfer uncertainty below 10-15. PTB-CSF1 and NICT-CsF1 showed good agreement within the stated uncertainties.

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