Comparison of Caesium fountain clocks in Europe and Asia

2014 European Frequency and Time Forum (EFTF) Pub Date : 2014-06-23 DOI:10.1109/EFTF.2014.7331532

A. Zhang, K. Liang, Z. Yang, F. Fang, T. Li, Dirk Piester, V. Gerginov, S. Weyers, A. Bauch, M. Fujieda, I. Blinov, A. Boiko, Y. Domnin, A. Naumov, Y. Smirnov, A. Gupta, P. Arora, A. Acharya, A. Agarwal

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引用次数: 1

Abstract

A remote comparison campaign of Caesium fountain clocks from four National Metrology Institutes in Europe and Asia was carried out in May 2013. Six fountains at Physikalisch-Technische Bundesanstalt (PTB) Germany, Scientific Research Institute of Physical-Technical and Radio Technical Measurements (VNIIFTRI-SU) Russia, National Physical Laboratory of India (NPLI) India and National Institute of Metrology (NIM) China were compared by Two-Way Satellite Time and Frequency Transfer (TWSTFT) and GPS Carrier Phase (GPS CP) techniques. The frequency differences and the comparison uncertainties between the compared fountain pairs were evaluated. The comparison uncertainty (uc) results from combining the uncertainties of the two compared fountain clocks and the uncertainty introduced by the comparison link. All the frequency differences between the fountains agreed within the 1-sigma uncertainty in the low 10-15 level. We present in this paper the measurements and the evaluation of the campaign in details.

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欧洲和亚洲铯喷泉钟的比较

2013年5月，对欧洲和亚洲四个国家计量研究所的铯喷泉钟进行了远程比较。采用卫星双向时频传输(TWSTFT)和GPS载波相位(GPS CP)技术，对德国物理技术中心(PTB)、俄罗斯物理技术和无线电技术测量科学研究所(VNIIFTRI-SU)、印度国家物理实验室(NPLI)和中国国家计量研究所(NIM)的6个喷泉进行了比较。评估了比较喷泉对之间的频率差异和比较不确定度。比较不确定度是由两个被比较喷泉钟的不确定度和比较环节引入的不确定度综合而成的。喷泉之间的所有频率差异在低10-15水平的1西格玛不确定度内一致。本文详细介绍了该运动的测量和评价。

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2014 European Frequency and Time Forum (EFTF)

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