Platforms: JASON-1


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Jason-1 was launched on December 7, 2001. The Jason-1 Launch vehicle is a Boeing Delta II 7920. The Delta vehicle is shared with another Nasa mission, Timed, with Jason-1 separated first. The launch site is Vandenberg Air Force Base. Its lifespan, announced for 5 years is already exceeded and the current capacities of the satellite still let forecast good performances.


Onboard instruments:

  • The Poseidon-2 altimeter
  • The JMR radiometer
  • Location systems
  • Doris (Doppler location)
  • TRSR (GPS location)
  • LRA (laser tracking)


Jason-1 operational time varying gravity model annual radial orbit signal.
Ocean variability is the central focus of the Jason-1 mission. The satellite's orbit - identical to Topex/Poseidon - has been defined to cover 90% of the world's ice-free oceans every ten days. Real-time data delivery will make it possible to issue ocean bulletins in much the same way as we do weather forecasts today.


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