BackForwardInstrument:  CMR 

Instrument details
Acronym CMR
Full name Calibration Microwave Radiometer
Purpose Water vapour correction for the radar altimeter of the HY-2 series
Short description 3-frequencies:18.7, 23.8 and 37 GHz
Background Consolidated technology
Scanning Technique Nadir-only viewing, associated to the HY-2 radar altimeter
Resolution 25 km
Coverage / Cycle Global coverage in 1 month for 30 km average spacing, or in 10 days for 100 km average spacing
Mass Power Data Rate


Providing Agency NSOAS
Instrument Maturity Flown on operational programme
Utilization Period: 2011-11-15 to ≥2021
Last update: 2020-08-20
Detailed characteristics
Satellites this instrument is flying on

Note: a red tag indicates satellites no longer operational, a green tag indicates operational satellites, a blue tag indicates future satellites

Instrument classification
  • Earth observation instrument
  • Passive microwave radiometer
  • Cross-track, special or non-scanning microwave radiometer
WIGOS Subcomponents No WIGOS subcomponents have been defined.
Mission objectives
Primary mission objectives
  • Integrated Water Vapour (IWV)
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Tentative Evaluation of Measurements

The following list indicates which measurements can typically be retrieved from this category of instrument. To see a full Gap Analysis by Variable, click on the respective variable.

Note: table can be sorted by clicking on the column headers
VariableRelevance for measuring this variableOperational limitationsExplanation
Integrated Water Vapour (IWV)4 - fairOver sea only.. Along-track only.MW channel(s) in the water vapour band around 23 GHz