Hide

To give you the best possible experience, this site uses cookies. Continuing to use this site means you agree
to our use of cookies. If you'd like to learn more about the cookies we use please find out more

Impact of loss of Altimetry: ENVISAT & Jason-1

Date added: Wednesday 30th May 2012

The events concerning Jason-1 and ENVISAT are a reminder of the current fragility of the current altimetry constellation and constitute a substantial degredation of the system.

  • Jason-1 (10 years old) has suffered three safe hold modes, inducing mission unavailability between 16-29 February; and since 3 March 2012; start of geodetic phase, 7 May 2012 with  measuring of mesoscale features greatly degraded because the algorithms used by Jason-1 were designed for the older, higher orbit
  • ENVISAT loss of communication 8 April. ESA declares ENVISAT out of mission - 9 May 2012.
  • Cryosat 2 has been integrated (6 February) for near real time applications (DUACS/SLTAC); Cryosat-2 is not an oceanography satellite (best effort, payload sampling…);
  • Jason-2 (4 years) is the only solid asset

Despite altimetry underpinning many operational oceanographic services, it remains non-operational and unsecured.

In order to understand the impact of the degradation the GODAE OceanView (OSEval-TT co-chairs Gilles Larnicol & Peter Oke) have collated feedback from data users and modellers, to rasie this issue with the mission agencies (CNES & NASA).

Impact results can be viewed ............