– the intergovernmental organization through which Member States act together
     on matters related to measurement science and measurement standards.
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Consultative Committee for Time and Frequency (CCTF)
The Consultative Committee for the Definition of the Second (CCDS) was set up in 1956. Its name was changed to Consultative Committee for Time and Frequency (CCTF) by the CIPM in 1997.

Present activities concern matters related to the definition and realization of the second, establishment and diffusion of International Atomic Time (TAI) and Coordinated Universal Time (UTC), and advice to the CIPM on matters related to time and time scales.
 
President:
Mr L. Erard
CIPM member, LNE Scientific Advisor
Laboratoire National de Métrologie et d'Essais
France
 
 
Executive Secretary:
Dr E.F. Arias
Director of the Time Department
Bureau International des Poids et Mesures
France

Contact form:  
President:    Mr L. Erard
CIPM member, LNE Scientific Advisor
Laboratoire National de Métrologie et d'Essais
France
Executive Secretary:    Dr E.F. Arias
Director of the Time Department
Bureau International des Poids et Mesures
France
Member(s):  
  • All-Russian Scientific Research Institute of Physical Technical Measurements, Rosstandart [VNIIFTRI], Moscow
  • Centro Nacional de Metrología [CENAM], Querétaro, Qro
  • Federal Institute of Metrology METAS [METAS], Bern-Wabern
  • International Astronomical Union [IAU]
  • International GNSS Service [IGS], Pasadena, CA
  • International Telecommunication Union, Radiocommunication Bureau [ITU-R], Geneva 20
  • International Union of Geodesy and Geophysics [IUGG], Boulder
  • International Union of Radio Science [URSI], Gent
  • Istituto Nazionale di Ricerca Metrologica [INRIM], Turin
  • Korea Research Institute of Standards and Science [KRISS], Daejeon
  • National Institute of Information and Communications Technology [NICT], Tokyo
  • National Institute of Metrology [NIM], Beijing
  • National Institute of Standards and Technology, United States Department of Commerce [NIST], Gaithersburg
  • National Measurement Institute, Australia [NMIA], Lindfield
  • National Metrology Institute of Japan, AIST [NMIJ/AIST], Tsukuba
  • National Metrology Institute of South Africa [NMISA], Pretoria
  • National Physical Laboratory [NPL], Teddington
  • National Physical Laboratory of India [NPLI], New Delhi
  • National Physical Laboratory of Israel [INPL], Jerusalem
  • National Research Council of Canada [NRC], Ottawa, Ontario
  • Observatoire de Paris/Systèmes de Référence Temps-Espace [SYRTE], Paris
  • Observatoire Royal de Belgique [ORB], Brussels
  • Physikalisch-Technische Bundesanstalt [PTB], Braunschweig
  • Real Instituto y Observatorio de la Armada [ROA], Cadiz
  • Space Research Centre of Polish Academy of Sciences [SRC], Warsaw
  • Technical Research Institute of Sweden [SP], Borås
  • Technical University of Graz [TUG], Graz
  • U.S. Naval Observatory [USNO], Washington D.C.
  • VSL [VSL], Delft
  • Official observer(s):   
  • Agency for Science, Technology and Research [A*STAR], Singapore
  • National Metrology Institute of Turkey [UME], Gebze-Kocaeli
  • Observatório Nacional/Divisão Serviço da Hora [ON/DSHO] , Rio de Janeiro
  • Note:

      The Director of the BIPM is a member, ex officio, of all Consultative Committees.