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Syrte

  • Did you know? The LNE-SYRTE of Observatoire de Paris is a partner of the Service National d’Observation (SNO) Gravimétrie.

    2 September 2020

    Four different French institutions (EOST in Strasbourg, OBSPM in Paris, OREME in Montpellier and LSSB in Rustrel) operate four different sites in France that contribute to the International Geodynamic and Tidal Service IGETS.

  • Iodine frequency stabilized laser for ground tests of LISA mission

    20 August 2020

    An all-fibered frequency-stabilized laser source device whose volume does not exceed 30 liters is being developed at SYRTE by the optical frequency metrology team. This device consists of a telecom C-band laser source at 1.5 µm (near IR) supplemented by an original frequency tripling device developed and patented by SYRTE. The device is then associated with a molecular transition of iodine to 515 nm (green) which serves as a frequency reference.

  • DISHAS is online!

    20 July 2020

    The web application DISHAS (Digital Information System for the History of Astral Sciences) is operational since the end of May 2020.

    After four years of modeling and development work within an international team led by SYRTE, it starts to receive its first historical data.

  • New translation : Publication of the book La Philosophie naturelle de Malebranche au XVIIIe siècle

    25 June 2020

    C. Schmit, La philosophie naturelle de Malebranche au XVIIIe siècle - Inertie, causalité, petits tourbillons
    Classiques Garnier, Collection Histoire et philosophie des sciences, 21, 2020, 809 p.

  • Arnaud Landragin Winner of the CNRS 2020 Medal for Innovation

    25 June 2020

    The prize rewards Arnaud Landragin’s research works in the field of atomic gravimetry and their successful transfer to industry.

  • 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.

The SYRTE department - Sytèmes de Référence Temps Espace - belong to Observatoire de Paris - Université PSL and is also associated with the CNRS (National Research Center) and Sorbonne Université

Laser source makes it possible to manipulate caesium atoms. It is linked to the caesium tube by means of optical fibres.

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.

Current french and UTC times? | National References of Time

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