Instrument Overview

MWR instrument onboard ERS missions
MWR instrument onboard ERS missions

The main objective of the microwave radiometer (MWR) on board ERS-1 and ERS-2 was the measurement of the integrated atmospheric water vapour column and cloud liquid water content, as correction terms for the signal of the radar altimeter (RA) on board the satellites.

In addition, MWR measurement data were useful for the determination of surface emissivity and soil moisture over land, for surface energy budget investigations to support atmospheric studies, and for ice characterisation.

The ERS-1 mission ended on 10 March 2000 and MWR measurements were continued on board the ERS-2 satellite which was retired on 5 September 2011.




All MWR ERS-1 and ERS-2 products, in accordance with ESA Earth Observation Data Policy, are freely available to users. Read more about the available MWR products:



Sentinel Application Platform

Sentinel Application Platform (SNAP) is a common architecture for all Sentinel Toolboxes. It is ideal for Earth Observation processing and analysis due to technological innovations.

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The goal of MWR calibration and validation activities was to verify the accuracy and quality of data the instrument acquired. MWR Validation documents are available.

Quality Control Reports

Quality Control is monitoring routinely the status of the spacecraft (payload and platform) and to check if the derived products meet the quality requirements along mission life-time. MWR Cyclic Quality Control Reports are available.