– the intergovernmental organization through which Member States act together
     on matters related to measurement science and measurement standards.
Search facility:


| Site map | News | Contact us
FTP server of the BIPM Time Department
Contents
Data
Circular T
UTCr
TT(BIPM)
Other products
Links
Scales
Annual Reports

Considering the evolving needs of time metrology and the convenience of allowing the contributing laboratories access to a realization of UTC more frequently than through the monthly BIPM Circular T, the Time Department implemented a rapid realization of UTC which has been officially published every week since July 2013. UTCr gives daily values of [UTCrUTC(k)] for a subset of laboratories contributing data to the monthly Circular T. Participation in UTCr is voluntary, provided that the laboratories commit to submitting data daily to the BIPM.

Although the results of UTCr are consistent with those in Circular T at the level of a few nanoseconds, BIPM Circular T remains the unique source of traceability to UTC.


    Rapid UTC
    View



    Daily values of the differences between UTCr and its local representation by the given laboratory
    View

Note: The Rapid UTC pilot experiment results are available at: ftp://tai.bipm.org/UTCr/Results/pilot_experiment/


Other international metrology data centres:





International metrology publications
SI Brochure
Guides in metrology
Metrologia
Circular T
IERS Conventions Center
Recommended values of standard frequencies
Related articles
International reference timescales
Recent publications of the BIPM Time Department