ERS-1 (1991 - 2000) was launched in 1991 on an Ariane-4 vehicle from Kourou, French Guiana. It was the ESA's first sun-synchronous polar-orbiting mission.
ERS is the first ESA program in Earth observation with the overall objectives to provide environmental monitoring in particular in the microwave spectrum (i.e., regular monitoring of land-surface and ocean-surface processes for change detection). Coverage of a broad range of disciplines and topics: Observation of oceans, polar ice, land ecology, geology, forestry, wave phenomena, bathymetry (water depth), atmospheric physics, meteorology, etc.
The ERS-1 mission ended on March 10, 2000 due to a failure of the onboard attitude control system.
By clicking on the different instruments you will find information on Products & Algorithms, Cal/Val activities and data Quality Control.