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  1. A ground station for Jason-2

    Publishing date:

    September 26, 2006

    The Jason-2 altimetry satellite will take over from Jason-1 in 2008, extending the continuous series of ocean measurements acquired starting in 1992 with Topex/Poseidon. Ground stations for Jason-2 are already being deployed. One of them, at Usingen, Germany, entered service on 28 September.

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  2. Jason-2 transferred to a lower orbit

    Publishing date:

    July 13, 2017

    Orbit transfer operations were carried out by CNES Toulouse Space Centre teams and took place between 3 and 9 July 2017. Jason-2 now operates on a 1,309 km high orbit.

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  3. Charting and forecasting ocean conditions

    Publishing date:

    June 3, 2008

    Satellite altimetry is the only space-based technology capable of penetrating below the ocean surface. This capability will benefit a broad range of ocean forecasting applications, now and in the future.

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  4. Jason-2: watching sea level and weather

    Publishing date:

    April 30, 2004

    Satellites monitor sea level, wave height, wind speed and current movements from space. Like its predecessors, Jason-2 will obtain all these data from altimeter range measurements.

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  5. T2L2 dans les bagages de Jason

    Publishing date:

    June 26, 2008

    Jason-2, le satellite d’altimétrie lancé le 20 juin, a emporté dans ses bagages 3 instruments qui n’ont rien à voir (ou presque) avec la mesure de la hauteur des océans. Parmi eux, T2L2 (Transfert de Temps par Lien Laser). Son rôle : la synchronisation d’horloges.

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  6. T2L2 hitches a ride on Jason-2

    Publishing date:

    July 15, 2008

    Three passenger instruments on Jason-2, the ocean surface topography satellite launched 20 June, won’t be measuring sea-surface height. One of them is the Time Transfer by Laser Link instrument (T2L2). Its job is to synchronize clocks.

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  7. Toulouse takes the pulse of Jason-2

    Publishing date:

    August 6, 2008

    During the night of 3-4 July, the Jason-2 oceanography satellite reached its final operational orbit at an altitude of 1,336 km. Positioning operations were conducted from the J2CCC control centre in Toulouse, which has now completed the 1st part of its mission. We take a look behind the scenes with the teams monitoring Jason-2’s health.

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  8. T2L2 ready to put Einstein’s theory to the test

    Publishing date:

    November 6, 2008

    The T2L2 instrument on board Jason-2 is working well after a 1st series of tests to compare the DORIS instrument’s clock with atomic clocks here on Earth. Scientists are continuing to calibrate the instrument.

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  9. T2L2: décortiquer la théorie d'Einstein

    Publishing date:

    November 6, 2008

    Pari gagné pour l’instrument T2L2 embarqué à bord de Jason-2. Les premiers tests ont permis de comparer l’horloge bord de l’instrument Doris avec des horloges atomiques au sol. Les scientifiques continuent le calibrage de l’instrument.

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  10. CNES and Eumetsat sign Jason-2 agreement

    Publishing date:

    May 24, 2006

    Last month, Europe (CNES and Eumetsat) and the United States (Nasa and NOAA) signed a cooperation agreement on the Jason-2 programme. The European partners have now signed a new agreement on this ocean surface topography mission.

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  11. Jason-2 all set to take satellite altimetry into higher gear

    Publishing date:

    October 29, 2008

    After 4 months of in-orbit commissioning, Jason-2 has entered the operational phase of its mission. The new ocean-observing satellite offers many improvements compared to its predecessor Jason-1.

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  12. Un terminal terrestre pour Jason-2

    Publishing date:

    September 26, 2006

    Le satellite altimétrique Jason-2 prendra en 2008 le relais de Jason-1. Il doit fournir des mesures de l’océan dans la continuité de celles effectuées depuis 1992 par Topex-Poséidon. D’ores et déjà, les terminaux terrestres utilisés pour Jason-2 sont en place. L’un d’entre eux, le terminal d’Usingen (Allemagne) est inauguré ce 28 septembre.

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  13. Jason-2 delivers its first global maps

    Publishing date:

    March 11, 2010

    The european-US Jason-3 oceanography satellite is scheduled to launch in 2013 to replace Jason-1. Its objective is to continue monitoring sea-surface height and pursue the 21-year time series of high-accuracy ocean altimetry measurements.

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  14. Depuis 1992: Topex-Poséidon, Jason 1 et Jason 2 voient la mer monter

    Source:

    • Sciences et techniques

    Publishing date:

    December 5, 2011

    Depuis le début des années 90, les satellites altimétriques de très haute précision Topex/Poseidon (1993-2006), Jason-1 (2001) et Jason-2 (2008) mesurent, avec une précision remarquable, l’élévation actuelle du niveau de la mer qui se poursuit inexorablement au rythme de 3,5 millimètres par an en moyenne.

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  15. 20 years in orbit for the Proteus satellite bus

    Publishing date:

    October 7, 2010

    The bus is a key element of a satellite, supplying power and enabling the spacecraft to be controlled from the ground. CNES has specialized in designing satellite buses since the 1990s. This year, its Proteus bus clocked up its 20th year in orbit.

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  16. A leap forward for oceanography

    Publishing date:

    June 10, 2008

    Over the last 15 years, altimetry satellites have been poring over the oceans in every detail, collecting more data in 10 days than could be gathered over several centuries by ships. This nascent revolution in oceanography promises to improve climate forecasting.

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