– 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
  CCTF Working Group on Coordination of the Development of Advanced Time and Frequency Transfer Techniques
  CCTF Working Group on GNSS Time Transfer
  CCTF Working Group on Primary and Secondary Frequency Standards
  CCTF Working Group on Strategic Planning
  CCTF Working Group on TAI
  CCTF Working Group on the CIPM MRA
  CCTF Working Group on Time Scale Algorithms
  CCTF Working Group on Two-Way Satellite Time and Frequency Transfer
Time and frequency
SI unit of time (second)
Committee structure
What time is it?
Reference time scales
Strategic plan
International equivalence

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