CCTF definition
Examples of CCTF in a sentence
A pre-requisite for inclusion of a particular secondary representation of the second is approval by the CCTF Working Group on Primary and Secondary Frequency Standards (WGPSFS).
One new optical clock from within the consortium has undergone evaluation by the WGPSFS, and there was extensive interaction with the CCTF and its working groups in the period leading up to the CCTF meeting held in October 2020.
Upon mutual agreement of the Parties the Sub-Committee on CCTF may invite relevant experts to participate in the discussion.
Since the project addressed a future change in the definition and realisation of the SI unit of time, the route to impact was through the CCTF and its working groups.
Reports on the project outputs have also been presented to other working groups of the CCTF.
The new recommended values for standard frequencies approved by the CCTF in 2021, which were strongly influenced by work in this project, were used for the first time for the calculation of TAI in Circular T no.
Prior to this project, correlations had been essentially ignored by the joint Frequency Standards Working Group (WGFS) of the Consultative Committee for Time and Frequency (CCTF) and Consultative Committee for Length (CCL) in calculating optimised frequency values and uncertainties for secondary representations of the second, even though this can lead to biased frequency values and underestimated uncertainties.
This update, approved by the CCTF in March 2021, was strongly influenced by work carried within the project, in particular our guidelines on the evaluation of correlation coefficients between frequency ratio measurements.
The Sub-Committee on CCTF shall meet at such time and venue as may be agreed by the Parties.
The Sub-Committee on CCTF shall be composed of the representatives of the customs authorities and relevant authorities of the Parties.