CCTF summary General information CCTF members CCTF working groups CCTF publications and bibliography Presentation by Mr Erard to the 23rd CGPM Photographs of the CCTF

Open access CCTF documents CCL-CCTF documents CGGTTS documents TWSTFT documents

Restricted access   CCTF working documents CCL-CCTF documents CCTF-WGPFS documents CGGTTS documents TWSTFT documents TAI laboratories WGPFS discussion forum

Special issue on Timescale Algorithms

in French: Comité consultatif du temps et des fréquences
	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 Directeur de la recherche scientifique et technologique  Laboratoire National de Métrologie et d'Essais  1, rue Gaston Boissier  75015  Paris  FRANCE
	Executive secretary Dr  E.F.  Arias Head of the Time, Frequency and Gravimetry Section  Bureau International des Poids et Mesures  Pavillon de Breteuil  92312  Sèvres Cedex  FRANCE  Contact form:
Meetings
	•  3 June 2009 Meeting of the CCTF WG on TAI •  From 4 to 5 June 2009 18th meeting of the CCTF