Comparing primary frequency standards at NIST and PTB

被引：9

作者：

Nelson, LM ^{[1
]}

Levine, J ^{[1
]}

Hetzel, P ^{[1
]}

机构：

[1] NIST, Boulder, CO USA

来源：

PROCEEDINGS OF THE 2000 IEEE/EIA INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM & EXHIBITION | 2000年

关键词：

D O I：

10.1109/FREQ.2000.887426

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We have constructed a link between the Physikalisch-Technische Bundesanstalt (PTB) in Braunschweig, Germany-and the National Institute of Standards and Technology (NIST) in Boulder, Colorado using carrier-phase: Global:Positioning System (GPS) receivers. The link provides a direct measurement of the frequency difference between hydrogen maser H2(PTB) and UTC(NIST), and can also be used to provide a direct comparison between the primary frequency standards at the two laboratories. Based on our previous work with this method, we expect to be able to realize the frequency comparisons with an uncertainty of about 2 x 10(-15) using several days of averaging. This uncertainty is smaller than the combined uncertainties of the primary frequency standards in both laboratories, and it therefore supports comparison of these primary frequency standards without degrading their capabilities with the noise of the transfer system.

引用

页码：622 / 628

页数：3

共 7 条

[1]

BEUTLER G, 1994, B GEOD, V68, P39

[2] Time transfer using the phase of the GPS carrier [J].