– the intergovernmental organization through which Member States act together
     on matters related to measurement science and measurement standards.
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FTP server of the BIPM Time Department
Contents
Circular T
UTCr
TT(BIPM)
Data
Other products
Links results
Hardware delay characterization
Annual Reports

Acronyms and locations of the timing centresView

Leap seconds table (from IERS) View


Values of the differences between UTC and its local representation by the given laboratory, including relevant notes and, since January 2007, the respective uncertainties.
View
Values of the differences between TAI and the local atomic scale of the given laboratory, including relevant notes
View

Relations of UTC and TAI with predictions of UTC(k) disseminated by GNSS and with the GNSS timesView


Weights of clocks participating in the computation of TAI
View
Rates relative to TAI of clocks participating in the computation of TAI
View
Frequency drifts of clocks participating in the computation of TAI
View
Fractional frequency of EAL from primary frequency standards
View

Difference between the normalized frequencies of EAL and TAIView

Difference between PSFS ensemble frequency and TAI frequency (d) View

Difference between PSFS frequency and TAI frequency (d)
View

Annual tables
Measurements of the duration of the TAI scale interval
View
Mean fractional deviation of the TAI scale interval from that of TT
View

Older files can be accessed directly from the FTP site (62.161.69.5 or ftp2.bipm.org).


Other international metrology data centres:





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