Observing Systems Capability Analysis and Review Tool
Satellite Programme: Joint Altimetry Satellite Oceanography Network
Series of three operational satellites for ocean altimetry.
International programme: initiated by NASA and CNES with JASON-1 as follow-on of TOPEX-Poseidon, then joined by EUMETSAT and NOAA.
The platforms are actively stabilised over 3 axes.
The design life time of the satellites is 5 years.
The satellites are placed in a medium-height, 66° inclination orbit, particularly stable, suitable for geodetic purposes.
The replacement policy is based on launching satellites in sequence, roughly 6 months before the expected end-of-life of a satellite.
See detailed description at
Distributed network of acquisition and control stations managed by NOAA and EUMETSAT.
Mission and control centre managed by CNES in Toulouse.
Near-real-time processing by EUMETSAT and NOAA.
2001 - 2021
Associated satellites and instruments
Note: red tag => no longer operational , green tag => operational , blue tag => planned
Joint Altimetry Satellite Oceanography Network
(2001 - 2013)
(2008 - 2017)
(2016 - 2021)