Title :
First comparison of primary frequency standards between Europe and Asia
Author :
Fujieda, M. ; Gotoh, T. ; Piester, D. ; Kumagai, M. ; Weyers, S. ; Bauch, A. ; Wynands, R. ; Hosokawa, M.
Author_Institution :
Nat. Inst. of Inf. and Commun. Technol., Koganei
fDate :
May 29 2007-June 1 2007
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.
Keywords :
frequency standards; masers; measurement uncertainty; transfer standards; Asia; Europe; NICT-CsFl; PTB-CSF1; TWSTFT link; caesium atomic fountain primary frequency standards; frequency difference; frequency transfer uncertainty; local H-masers; primary frequency standards; two-way satellite time and frequency transfer; Asia; Communication standards; Communications technology; Europe; Frequency; Global Positioning System; Research and development; Satellites; Stability; Uncertainty;
Conference_Titel :
Frequency Control Symposium, 2007 Joint with the 21st European Frequency and Time Forum. IEEE International
Conference_Location :
Geneva
Print_ISBN :
978-1-4244-0646-3
Electronic_ISBN :
1075-6787
DOI :
10.1109/FREQ.2007.4319217
