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Instrument image

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.

Not Operational
Imaging multi-spectral radiometers (passive microwave) &
Technical Characteristics
Spatial Resolution:
Swath Width:
Microwave: 23.8 and 36.5GHz
Earth Topics
Atmosphere ( Atmospheric Temperature )
Related Instruments
Available Resources Type Access
RA 2/MWR Product Handbook Technical Document download
RA2/MWR Products Specifications Technical Document download
Further information related to MWR Products and Quality General Reference link
Minimize Latest Mission Operations News

OADS - OTF maintenance on 18 November 2019

15 November 2019

Due to a scheduled maintenance, access to the OADS-OTF online dissemination systems for ERS / Envisat data and Third Party Missions (TPM) datasets will be unavailable on Monday 18 November 2019 during the following time frames:

  • From 10:00 to 13:00 CET - ERS and Envisat dissemination service
  • From 15:00 to 16:00 CET - TPM data dissemination