Roadmap towards the redefinition of the second - Astrophysique Relativiste Théories Expériences Métrologie Instrumentation Signaux Access content directly
Journal Articles Metrologia Year : 2023

Roadmap towards the redefinition of the second

Marina Gertsvolf
Christopher Oates
Tetsuya Ido
Patrizia Tavella
Gerard Petit
Gianna Panfilo
  • Function : Author
Jon Bartholomew
  • Function : Author
Pascale Defraigne
E Donley
  • Function : Author
Per Olof Hedekvist
Pierre Dubé
Helen Margolis
David Newell
  • Function : Author
Sergei Slyusarev
  • Function : Author
Stefan Weyers
J-P Uzan
  • Function : Author
Masami Yasuda
D-H Yu
  • Function : Author
Carsten Rieck
  • Function : Author
Harald Schnatz
  • Function : Author
Yuko Hanado
  • Function : Author
Miho Fujieda
James Hanssen
  • Function : Author
A Malimon
  • Function : Author
Neil Ashby


Abstract This paper outlines the roadmap towards the redefinition of the second, which was recently updated by the CCTF Task Force created by the CCTF in 2020. The main achievements of optical frequency standards (OFS) call for reflection on the redefinition of the second, but open new challenges related to the performance of the optical frequency standards, their contribution to time scales and UTC, the possibility of their comparison, and the knowledge of the Earth’s gravitational potential to ensure a robust and accurate capacity to realize a new definition at the level of 10-18 uncertainty. The mandatory criteria to be achieved before redefinition have been defined and their current fulfilment level is estimated showing the fields that still needed improvement. The possibility to base the redefinition on a single or on a set of transitions has also been evaluated. The roadmap indicates the steps to be followed in the next years to be ready for a sound and successful redefinition.
Fichier principal
Vignette du fichier
Dimarcq_2024_Metrologia_61_012001.pdf (1.52 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive
licence : CC BY - Attribution

Dates and versions

hal-04375006 , version 1 (09-02-2024)



Noel Dimarcq, Marina Gertsvolf, Gaetano Mileti, Sebastien Bize, Christopher Oates, et al.. Roadmap towards the redefinition of the second. Metrologia, 2023, 61 (1), pp.012001. ⟨10.1088/1681-7575/ad17d2⟩. ⟨hal-04375006⟩
57 View
16 Download



Gmail Facebook X LinkedIn More