– 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
Introduction
Data
Publications
Scales
Links
Circular T
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Values of the differences between TAI and the local atomic scale of the given laboratory, including relevant notes
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Values of the differences between UTC and its local representation by the given laboratory, including relevant notes and, since January 2007, the respective uncertainties.
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Rapid UTC
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Daily values of the differences between UTCr and its local representation by the given laboratory
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Fractional frequency of EAL from primary frequency standards
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Weights of clocks participating in the computation of TAI
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Rates relative to TAI of clocks participating in the computation of TAI
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Frequency drifts of clocks participating in the computation of TAI
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[UTC(lab1)-UTC(lab2)] obtained by the TWSTFT link, as published in the BIPM TWSTFT reports
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Most recent schedules for common-view observations of GPS and GLONASS satellites
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Acronyms and locations of the timing centres
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Leap seconds
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Values of the differences between TAI and UTC and the respective local scales, evaluated for two-month periods until the end of 1997
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BIPM Two-Way Satellite Time and Frequency Transfer Reports
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Older files can be accessed directly from the ftp site (62.161.69.5 or ftp2.bipm.org).

Rapid UTC: The 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