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THEMATIC AREA

Missions

Explore the European Space Agency's Earth Observation satellite missions. Learn all about ESA's dedicated Earth Explorers or collaborations with other agencies through the Third Party Missions programme.

ERS
Heritage Missions

ERS

The ERS programme was composed of two missions, ERS-1 and ERS-2, which together observed the Earth for 20 years, from 1991 to 2011.

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INSTRUMENTS

Explore the many instruments the European Space Agency use to observe the Earth. ESA offer data from a wide range of optical, radar, atmospheric, altimetric and gravimetric instrumentation.

a-altimeters

Heritage Missions

RA-2

The RA-2 instrument aboard Envisat acquired radar altimetry data over ocean, land and ice surfaces.

a-imaging-radars

Heritage Missions

ASAR

ASAR ensures continuity with the image mode (SAR) and the wave mode of the ERS-1/2 AMI.