| Numéro |
J. Phys. Colloques
Volume 42, Numéro C8, Décembre 1981
Troisième Symposium sur les Etalons de Fréquence et la Métrologie / Third Symposium on Frequency Standards and Metrology
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|---|---|---|
| Page(s) | C8-219 - C8-228 | |
| DOI | https://doi.org/10.1051/jphyscol:1981826 | |
Troisième Symposium sur les Etalons de Fréquence et la Métrologie / Third Symposium on Frequency Standards and Metrology
J. Phys. Colloques 42 (1981) C8-219-C8-228
DOI: 10.1051/jphyscol:1981826
Bureau International de l'Heure, Observatoire de Paris, 61, avenue de l'Observatoire, 75014 Paris, France.
J. Phys. Colloques 42 (1981) C8-219-C8-228
DOI: 10.1051/jphyscol:1981826
STATUS OF THE INTERNATIONAL ATOMIC TIME TAI
B. GuinotBureau International de l'Heure, Observatoire de Paris, 61, avenue de l'Observatoire, 75014 Paris, France.
Abstract
This paper summarizes the methods for establishing the International Atomic Time TAI and states its stability and accuracy. The various factors which limit the quality of TAI are considered. Special attention is given to some systematic differences between some of the instruments which contribute to TAI, especially to the seasonal effects which were recently found.