The main objective of the microwave radiometer is the measurement of atmospheric humidity as supplementary information for tropospheric path correction of the radar altimeter signal, which is influenced both by the integrated atmospheric water vapour content and by liquid water. In addition, MWR measurement data are 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 MWR instrument on board Envisat is a derivative of the radiometers used on the ERS-1 and ERS-2 satellites. It is a dual-channel nadir-pointing Dicke-type radiometer, operating at frequencies of 23.8 GHz and 36.5 GHz.
Imaging multi-spectral radiometers (passive microwave) &
Microwave: 23.8 and 36.5GHz
Atmosphere ( Atmospheric Temperature )
Latest Mission Operations News
05 January 2018
Due to a scheduled maintenance starting on 09 January 2018, access to the On-The-Fly online dissemination systems will be unavailable and the access to the ERS and Envisat (A)SAR collections via EOLI-SA will also be affected during the maintenance on 10 January 2018.
Related Data Types
Related (Key) Documentation