International atomic time: Status and future challenges

Gérard Petit; Felicitas Arias; Gianna Panfilo

doi:10.1016/j.crhy.2015.03.002

International atomic time: Status and future challenges

Gérard Petit ¹ ; Felicitas Arias ¹; Gianna Panfilo ¹

¹ Time Department, Bureau international des poids et mesures, Pavillon de Breteuil, 92312 Sèvres, France

Comptes Rendus. Physique, The measurement of time / La mesure du temps, Volume 16 (2015) no. 5, pp. 480-488.

Abstract
Résumé

We present the time scales elaborated at the International Bureau of Weights and Measures (BIPM), review their present status, and discuss the transition in frequency performance from the present $10^{- 16}$ to the future $10^{- 17} – 10^{- 18}$ , and its impact on time and frequency metrology. We focus our attention on future developments in the calculation of Coordinated Universal Time (UTC), on the evolution of time links and algorithms, on improving the access to the time reference and on possible changes in the definition of the timescales.

Nous présentons les échelles de temps élaborées par le Bureau international des poids et mesures (BIPM) et évaluons leurs performances présentes. Nous discutons la transition en cours pour passer du niveau actuel de $10^{- 16}$ sur l'incertitude de fréquence au niveau futur de $10^{- 17} – 10^{- 18}$ , et de l'impact de ce changement sur la métrologie temps–fréquence. Nous concentrons notre attention sur les développements futurs pour le calcul du temps universel coordonné (UTC), sur l'évolution des techniques de comparaisons d'horloges et des algorithmes, sur l'amélioration de l'accès à la référence de temps et sur les changements possibles dans la définition des échelles de temps.

Published online: 2015-04-01

DOI: 10.1016/j.crhy.2015.03.002

Keywords: International timescales, Frequency standards, Time links, Algorithms
Mots-clés : Échelles de temps internationales, Etalons de fréquence, Horloges, Algorithmes

Author's affiliations:

Gérard Petit ¹; Felicitas Arias ¹; Gianna Panfilo ¹

¹ Time Department, Bureau international des poids et mesures, Pavillon de Breteuil, 92312 Sèvres, France

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Gérard Petit; Felicitas Arias; Gianna Panfilo. International atomic time: Status and future challenges. Comptes Rendus. Physique, The measurement of time / La mesure du temps, Volume 16 (2015) no. 5, pp. 480-488. doi : 10.1016/j.crhy.2015.03.002. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2015.03.002/

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