Jason-3 satellite. Computer artwork of the Jason-3 Ocean Surface Topography Mission (OSTM) satellite in Earth orbit. OSTM is an international Earth observation satellite mission that uses an array of instruments to map ocean surface topography to a high degree of accuracy. This allows global monitoring of tides, ocean currents and oscillations, ocean circulation, and climate change-induced rises in sea levels. Jason-3, scheduled for launch in 2015, will be the fourth spacecraft to be part of the OSTM, which was begun in 1992 by the joint NASA/CNES TOPEX/Poseidon mission and followed by the NASA/CNES Jason-1 (2001) and Jason-2 (2008) missions.
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