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Current and future realizations of coordinate time scales

Published online by Cambridge University Press:  06 January 2010

E. Felicitas Arias
E. Felicitas Arias*
Affiliation:
International Bureau of Weights and Measures, Sèvres, France email: [email protected] Associated astronomer at the Paris Observatory, Paris, France
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Abstract

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Two atomic time scales maintained at the International Bureau of Weights and Measures (BIPM) are realizations of terrestrial time: International Atomic Time (TAI) and TT(BIPM). They are calculated from atomic clocks realizing proper time in national laboratories. The algorithm for the calculation of TAI has been designed to optimize the frequency stability and accuracy of the time scale. Plans for the future improvement of the reference time scales are presented.

Keywords

coordinate time scalesatomic time scales
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S261: Relativity in Fundamental Astronomy: Dynamics, Reference Frames, and Data Analysis , April 2009 , pp. 95 - 101
Copyright
Copyright © International Astronomical Union 2010

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