Comptes Rendus
no. 5
International atomic time: Status and future challenges
[Le temps atomique international : état de l'art et perspectives]
Gérard Petit1  ; Felicitas Arias1  ; Gianna Panfilo1
1 Time Department, Bureau international des poids et mesures, Pavillon de Breteuil, 92312 Sèvres, France
Comptes Rendus. Physique, Volume 16 (2015) no. 5, pp. 480-488.

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.

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.

Publié le :
DOI : 10.1016/j.crhy.2015.03.002
Keywords: International timescales, Frequency standards, Time links, Algorithms
Mot clés : Échelles de temps internationales, Etalons de fréquence, Horloges, Algorithmes
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, 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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