SYRTE

First Two-Way Satellite Link with Digital Reception in UTC

18 March 2020

For the first time, Two-Way Satellite Time and Frequency Transfer between LNE-SYRTE and PTB, improved by Software-Defined Radio solution, is used for International Atomic Time (TAI) and Coordinated Universal Time (UTC) computations.
a new way to search for a variation of the fine-structure constant

26 February 2020

For the first time, spectral measurements of five stars orbiting the supermassive black hole in our Galactic Center leads to a direct constraint on a possible variation of the fine structure constant.
REFIMEVE+ reaches Grenoble

31 January 2020

856-km coherent optical link is estabished between Paris and Grenoble. This is a worl record on such a distance and an important step for REFIMEVE.
Hephahestos forges activated by Earth’s rotation

30 November 2019

The sismicity and eruptivity of the Giant of Siciliy could be activated, at interannual time scales, by the pole tide, directly related to the motion of the Earth’s rotation pole about the mean pole. Study published by Sébastien Lambert and Gianluca Sottili (Is there an influence of the pole tide on volcanism? Insights from Mount Etna recent activity, Geophysical Research Letters, DOI:10.1029/2019GL085525, 2019).
Suzanne Débarbat recieves the Price Paul Doistau-Émile Blutet de l’Information Scientifique

28 November 2019

The Prize, awarded by the Academy of Sciences, recognizes Suzanne Débarbat’s work in the history of science.
How to redefine the second with optical clocks?

12 September 2019

The second of the International System of Units (SI) is defined from the hyperfine transition of the 133Cs atom. In the current context where many new generation optical clocks surpass 133Cs based clocks, could the second one be redefined, not from a single transition but from several? An article published in Metrologia proposes such a definition, and shows that it is free of contradiction and feasible according to all the criteria in effect at the Comité International des Poids et Mesures (CIPM).
G7-research delegates at SYRTE

26 June 2019

G7-research delegates (from Germany, Canada, USA, France, Italy, Japan, UK) and EU-delegates had a visit at SYRTE on Thursday 20 june, 2019.

It is a leader in time and frequenciy metrology and is also specialized in Earth rotation, celestial reference frame and history of Astronomy.
SYRTE has a multidisciplinary research activity with transverse expertise in theory, instrumentation and data analysis and various goals from fundamental physics tests to industrial transfers.It is founder membre of Laboratoire d’Excellence du Programme Investissements d’Avenir FIRST-TF.

It has in charge several international services. Associated with the LNE - Laboratoire National de Métrologie et d’Essais - the SYRTE has the responsability of the national reference time and frequence. With the IERS (International Earth Rotation Service), it deliver Earth rotation parameters and other services.

Its teams take part in training and education by giving university lectures and also spread scientific culture by organizing public talks.

Heure légale française [...]

First Two-Way Satellite Link with Digital Reception in UTC

a new way to search for a variation of the fine-structure constant

REFIMEVE+ reaches Grenoble

Hephahestos forges activated by Earth’s rotation

Suzanne Débarbat recieves the Price Paul Doistau-Émile Blutet de l’Information Scientifique

How to redefine the second with optical clocks?

G7-research delegates at SYRTE