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Atomic time scales TAI and TT(BIPM): present performances and prospects

Published online by Cambridge University Press:  21 October 2010

Gérard Petit
Gérard Petit*
Affiliation:
Bureau International des Poids et Mesures 92312 Sèvres Cedex, France email: gpetit@bipm.org
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Abstract

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We review the stability and accuracy achieved by the reference atomic time scales TAI and TT(BIPM). We show that they presently are at the level of a few 10−16 in relative value, based on the performance of primary standards, of the ensemble time scale and of the time transfer techniques. We consider how the 1 × 10−16 value could be reached or superseded and which are the present limitations to attain this goal.

Keywords

TimeReference systems
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Highlights H15: Highlights of Astronomy , November 2009 , pp. 220 - 221
Copyright
Copyright © International Astronomical Union 2010

References

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