Valeurs recommandées des fréquences étalons

The CIPM has charged the CCL-CCTF Frequency Standards Working Group (CCL-CCTF-WGFS) with maintaining this list of recommended values of standard frequencies for applications including the practical realization of the definition of the metre and secondary representations of the definition of the second.

Toutes les radiations de cette liste (à l'exception de la transition de ⁸⁷Rb 6,8 GHz) peuvent être utilisées pour réaliser le mètre.

Les informations sont disponibles en PDF ci-dessous ou dans un format lisible par machine à partir du service API.

Service API

Les radiations accompagnées de [SRS] peuvent être utilisées comme représentations secondaires de la seconde.

Graphical representation

CCL-CCTF-WGFS Realization of the definition of some important SI units

Related publications

• Metrologia 58 (2021) 052002

  The new mise en pratique for the metre – a review of approaches for the practical realization of traceable length metrology from 10⁻¹¹ m to 10¹³ m

  Authors:

  Schödel R., Yacoot A., Lewis A.

• Metrologia 55 (2018) 188-200

  The CIPM list of recommended frequency standard values: guidelines and procedures

  Authors:

  Riehle F., Gill P., Arias F., Robertsson L.

• Metrologia 53 (2016) 1272-1280

  On the evaluation of ultra-high-precision frequency ratio measurements: examining closed loops in a graph theory framework

  Authors:

  Robertsson L.

• Metrologia 52 (2015) 628-634

  Least-squares analysis of clock frequency comparison data to deduce optimized frequency and frequency ratio values

  Authors:

  Margolis H.S., Gill P.