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left_on.gifKind of Earth Observation Satellite
left.gifKind of sensor
spacer.gifsub_directry.gifERS AMI
spacer.gifsub_directry.gifERS SCAT
spacer.gifsub_directry.gifERS RA
spacer.gifsub_directry.gifERS ASTR-M
spacer.gifsub_directry.gifERS LRR
spacer.gifsub_directry_end.gifERS PRARE
left.gifFirst Image



European Remote Sensing Satellite No.1 (ERS-1) was launched into a solar-synchronous orbit at an altitude of about 780 km in 1991. It is an Earth Observation Satellite to mainly observe ocean, sea ice districution, sea surface wind, oceanic circulation, etc. and observes land areas with a high-resolution radar, too.

Synthetic Aperture Radar (AMI), Scatterometer (SCAT), Radar Altimeter (RA), Scanning Radiomter and Sounder (ATSR-M), Laser Reflector (LRR), Precision Ranging Equipment (PRARE) are equipped with the satellite and data other than those by SAR can be recorded by the data recorder. The satellite has three modes of operation in a recurrent period of 35 days as standard, 3 days, and 176 days flying at an altitude of 780 km in a solar-synchronous orbit with an inclination of 98.5°.


Weight About 2.4t
Design life 2-3years
Launch Vehicle ERS-1 / Ariane
ERS-2 / Ariane
Launch Site ERS-1 / Guiana Space Centre
ERS-2 / Guiana Space Centre
Launch Date ERS-1 / July 17,1991
ERS-2 / Apr 21,1995
Orbit Type Sun synchronous sub-recurrent orbit
Altitude About 777km
Inclination About 98.5deg.
Period About 100.5min
Recurrent Period 3day(Observation for ice)
35day(AMIImaging mode)
176day(Observation for sea)

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