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CCTF Working Group on TAI (CCTF-WGTAI)

Terms of reference

The mandate of the CCTF WGTAI is as follows:

  • to examine the remarks and requirements expressed by the users of TAI;
  • to prepare guidelines for the improvement of the service of TAI and to report on these to the CCTF, and
  • to establish temporary ad hoc study groups to analyse specific problems, whenever necessary; these study groups should report to the working group.

The said mandate should extend to Coordinated Universal Time UTC.

The working group should normally work by correspondence addressed to the Chair, and should meet annually at the Chair's request, if possible.

The Working Group on TAI should work closely with all the other CCTF working groups to harmonize the overall contributions to TAI.

The BIPM provides the permanent secretariat for the working group.

September 2012


  • Dr Marina Gertsvolf  (NRC)


  • Dr Patrizia Tavella  (BIPM)


  • a representative of each of the following organizations: International Astronomical Union (IAU), International Committee for Weights and Measures (CIPM), International Union of Radio Science (URSI), International Telecommunication Union, Radiocommunication Sector (ITU-R);
  • the Director of the BIPM;
  • the individual responsible for TAI at the BIPM; and
  • representatives of the laboratories contributing to TAI

Contact persons:

  • Dr Michel Abgrall (LNE-SYRTE)
  • Dr Ashish Agarwal (NPLI)
  • Mr Ibrahim Ahmed (KEBS)
  • Mr Khalid AL-Dawood (SASO-NMCC)
  • Ms Takun Alena (BelGIM)
  • Mr Jon Greg Bartholomew (EMI)
  • Dr Andreas Bauch (PTB)
  • Mr Laurent-Guy Bernier (METAS)
  • Ms Violeta Ciociea (INM)
  • Dr Michael Coleman (U.S. NRL)
  • Mr Frank Coutereel (FPS Economy)
  • Dr Albin Czubla (GUM)
  • Ms Unurbileg Darmaa (MASM)
  • Dr Ricardo José De Carvalho (ON/DSHO)
  • Dr Pascale Defraigne (ORB)
  • Mr Jérôme Delporte (CNES)
  • Mr Henry Diaz (INACAL)
  • Mr Erik Dierikx (VSL)
  • Dr Adam Dunford (MSL)
  • Dr Horst Ender (DTAG)
  • Dr Héctor Esteban (ROA)
  • Mr Oscar Fallas (ICE)
  • Dr Johann Furthner (DLR)
  • Dr Guilherme Garcia (INMETRO)
  • Mr Veselin Gavalyugov (BIM)
  • Dr Marina Gertsvolf (NRC)
  • Dr Nadya Goldovsky (INPL)
  • Dr Gihan Gomah (NIS)
  • Dr Demián Gómez (IGN)
  • Dr Ramiz Hamid (UME)
  • Mr Harald Hauglin (JV)
  • Ing. Liz Hernández (INM Colombia)
  • Mr Tai Wai Hui (HKO)
  • Dr Tetsuya Ido (NICT)
  • Dr Kenneth Jaldehag (RISE)
  • Mr Philippe Kadok (ILNAS)
  • Dr Artem Karaush (VNIIFTRI)
  • Mr Samy Khadem-Al-Charieh (MTC)
  • Dr Paul Koppang (USNO)
  • Dr George Krikelas (EIM)
  • Dr Alexander Kuna (UFE)
  • Dr Filippo Levi (INRIM)
  • Dr Chia-Shu Liao (TL)
  • Dr Diego Luna (INTI)
  • Mr Chris Matthee (NMISA)
  • Dr Yusong Meng (NMC, A*STAR)
  • Mr Armin Mirto (BOM)
  • Dr Rimantas Miskinis (FTMC)
  • Dr Mohd Nasir Zainal Abidin (NMIM)
  • Dr Jerzy Nawrocki (AOS)
  • Dr Olukayode Okusaga (JHAPL)
  • Dr Carlos Andrés Ortiz Cardona (CENAM)
  • Mr Anuradha Perera (MUSSD)
  • Dr Piyaphat Phoonthong (NIMT)
  • Dr Trieu Viet Phuong (VMI-STAMEQ)
  • Dr Borut Pinter (MIRS)
  • Dr Carlos Pires (IPQ)
  • Mrs Snezana Renovica (DMDM)
  • Prof. Torben Schueler (BKG)
  • Dr Jeffrey Sherman (NIST)
  • Mr Osman Sibonjic (IMBIH)
  • Mr Juraj Sluciak (SMU)
  • Mr Volodymyr Soldatov (NSC IM)
  • Mr Raul Fernando Solis Betancur (CENAMEP AIP)
  • Dr Tomonari Suzuyama (NMIJ/AIST)
  • Mr Endre Szentirmai (BFKH)
  • Dr Yoshiaki Tamura (NAO)
  • Mr Cho Man Tsui (SCL)
  • Mr Goran Vukoslavovic (BMM)
  • Dr Pierre Waller (ESA)
  • Dr Anders Wallin (MIKES)
  • Ms Xiang Wang (JATC)
  • Mr Peter Whibberley (NPL)
  • Dr Michael Wouters (NMIA)
  • Dr Wenjun Wu (NTSC)
  • Mrs Fan Yang (BIRM)
  • Dr Dai-Hyuk Yu (KRISS)
  • Prof. Aimin Zhang (NIM)

  CCTF: Upcoming meetings
11–12 March 2021: Second session of the 22nd meeting of the CCTF (online)
18–19 March 2021: Second session of the 22nd meeting of the CCTF (online)
27 June to 1 July 2022: 23rd meeting of the CCTF and related meetings

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BIPM Workshop on Advanced Time & Frequency Transfer Techniques 2011