U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PUBLICATIONS

Comment on the Paper Metrologia 42 49-57 (2005) by K. Szymaniec et al,

Published

Author(s)

Steven R. Jefferts, F Levi

Abstract

A recent evaluation of the accuracy of National Physical Laboratory (NPL) primary frequency standard NPL CsF1 gives an overall frequency uncertainty of δŅ/Ņ0 = 1 × 10-15. This stated uncertainty includes a correction of a frequency bias of δŅ/Ņ0 = 8 × 10-16{plus or minus} 3 × 10-16 which is attributed by the authors to microwave leakage. We believe that the cause of the frequency bias, its magnitude and its stated uncertainty are in error.
Citation
Metrologia
Volume
43
Pub Type
Journals

Citation

Jefferts, S. and Levi, F. (2006), Comment on the Paper Metrologia 42 49-57 (2005) by K. Szymaniec et al,, Metrologia (Accessed December 3, 2023)

Created February 1, 2006, Updated February 17, 2017