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  1. Jason-2 all set for the off

    Publishing date:

    June 18, 2008

    The Jason-2 oceanography satellite is now in the home straight and set for launch Friday 20 June. Before reaching final orbit, the satellite will go through a sequence of steps just after launch and during the beginning-of-life phase of its mission. Jason-2 teams are watching launch preparations advance in California with much relief after a series of setbacks over the last 2 weeks. First, successive delays in the launch of the GLAST satellite pushed back the departure of Jason-2, since the same ground teams were preparing both satellites; and then poor weather prevented the satellite from being mated with the launcher as planned.

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  2. Jason-2 takes to the air

    Publishing date:

    May 7, 2008

    Since 1992, altimetry satellites have significantly enhanced our knowledge of the world’s oceans. The Jason-2 satellite is all set to take over the ocean-observing mission of its predecessors Jason-1 and Topex/Poseidon. It recently arrived at Vandenberg Air Force Base, California, in preparation for launch on 15 June.

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  3. 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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  4. 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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  5. Surveying Earth’s oceans: Jason-1 and Jason-2 join forces

    Publishing date:

    February 24, 2009

    After a 6-month cross-calibration phase, Jason-2 has been moved into the orbit of its predecessor Jason-1. The 2 ocean-observing satellites will now fly in tandem on parallel ground tracks until Jason-1 reaches the end of its mission life, thereby doubling ocean data coverage.

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  6. 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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  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. Jason-2: a family affair

    Publishing date:

    May 27, 2008

    Jason-2’s main mission is to take over from its predecessor Jason-1 and assure data continuity. But the latest in the series of oceanography satellites is also carrying some new passengers. A brief tour of the “added extras” on Jason-2...

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  9. 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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  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. 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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  12. 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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  13. 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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  14. Jason-2 delivers its first global maps

    Publishing date:

    August 7, 2008

    The first global ocean maps delivered by Jason-2 compare very closely to those obtained by its predecessor Jason-1. A real bonus for the teams calibrating the satellite’s instruments.

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