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CCTF Capacity Building Project empowers the Time and Frequency metrology community

The Consultative Committee for Time and Frequency (CCTF) has initiated in 2023 a capacity building project in cooperation with the Ultrasonic, Ferroelectrics and Frequency Control (UFFC) Society, a part of the Institute of Electrical and Electronics Engineers. The joint initiative aims to enhance the capabilities of Coordinated Universal Time (UTC) laboratories, National Metrology Institutes (NMIs) and the broader Time and Frequency (TF) community, interested in gaining more expertise in TF data treatment and in the realization of a time scale. The CCTF also plans to invite NMIs to share training resources, fostering a collaborative program to support national and international timekeeping.

Supported by Dr Bharath Vattikonda, seconded to the BIPM from NPL India, the first output of the project is an e-learning course designed to impart knowledge and processing skills related to time transfer through GNSS pseudorange measurements. The material comprises a tutorial and interactive open-source software, complemented by a dedicated user manual and video demonstration.

Additional resources will be made accessible throughout 2024, via the communication platforms of the BIPM and UFFC:

  • a software and user guidelines enabling laboratories to check their clock behaviour and to simulate clocks and time scales;
  • a collection of available resources, shared by NMIs, such as guidelines, standards and software modules covering the basic topics in TF metrology;
  • a series of recordings of CCTF technical exchange meetings.


UTC - Coordinated Universal Time - is a time scale produced by the BIPM with the same rate as International Atomic Time (TAI). It differs from TAI only by an integral number of seconds.
GNSS - Global Navigation Satellite System