– the intergovernmental organization through which Member States act together
     on matters related to measurement science and measurement standards.
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Time and frequency: Committee structure
CIPM Consultative Committee:
  CCTF: Consultative Committee for Time and Frequency

CCTF Working Groups:
  CCL-CCTF Frequency Standards Working group (CCL-CCTF-WGFS)
  CCTF Working Group on Coordination of the Development of Advanced Time and Frequency Transfer Techniques (CCTF-WGATFT)
  CCTF Working Group on GNSS Time Transfer (CCTF-WGGNSS)
  CCTF Working Group on Primary and Secondary Frequency Standards (CCTF-WGPSFS)
  CCTF Working Group on Strategic Planning (CCTF-WGSP)
  CCTF Working Group on TAI (CCTF-WGTAI)
  CCTF Working Group on the CIPM MRA (CCTF-WGMRA)
  CCTF Working Group on Time Scale Algorithms (CCTF-WG-ALGO)
  CCTF Working Group on Two-Way Satellite Time and Frequency Transfer (CCTF-WGTWSTFT)
Time and frequency
SI unit of time (second)
Committee structure
What time is it?
Reference time scales
Strategic plan
International equivalence
Calibration and measurement capabilities (CMCs)
International comparisons
At the BIPM
BIPM technical work
BIPM calibrations for time transfer
BIPM Annual Report on Time Activities
Recent BIPM publications in the scientific literature
FTP server of the BIPM Time Department
BIPM Time Department Database
BIPM liaison and coordination work
IERS Conventions Center
BIPM contact person