BackForwardInstrument:  HyMATHS 

Instrument details
Acronym HyMATHS
Full name Hyperspectral Millimetre Wave Atmospheric Temperature & Humidity Sounder
Purpose To measure profiles of atmospheric temperature & humidity
Short description
  • Medium-resolution spectro-radiometerĀ 
  • 100 Channels, 50-70GHz/118GHz/183.31GHz
Background
  • New development
Scanning Technique
Resolution Temperature channels 25km Water vapour channels 15 km
Coverage / Cycle Swath 1500 km
Mass Power Data Rate

 

Providing Agency ISRO
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2027 to 2032
Last update: 2025-11-10
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
  • Subcomponent 3
  • Hyperspectral MW sensors
  • Hyperspectral MW radiometer
Mission objectives
Primary mission objectives
  • Atmospheric temperature
  • Integrated Water Vapour (IWV)
  • Specific humidity
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
Note: * Primary mission objective.
VariableRelevance for measuring this variableOperational limitationsExplanation
Atmospheric temperature*1 - primaryCoarse vertical resolution.Many MW channels in the 54 GHz band. Nearly all-weather sounding
Downward long-wave irradiance at Earth surface5 - marginalHighly indirect.MW channels in bands 54 and 183 GHz to account for downward cloud radiation
Freezing level height in clouds3 - highNo specific limitation.MW channels in the 54 GHz band. Inference from the temperature profile
Melting layer depth in clouds3 - highNo specific limitation.MW channels in the 54 GHz band. Inference from the temperature profile
Precipitation intensity at surface (liquid or solid)4 - fairNo specific limitation.MW channels in the 54 and 183 GHz bands. Suitable for solid and liquid precipitation over sea and land, Insensitive to surface emissivity
Specific humidity*2 - very highCoarse vertical resolution.MW channels in the 183 GHz band, and 54 GHz for temperature and liquid water corrections
Integrated Water Vapour (IWV)*2 - very highNo specific limitation.MW channels in the water vapour band around 183 GHz
Upward long-wave irradiance at Earth surface5 - marginalHighly indirect.MW channels is the 54 and 183 GHz bands to infer the impact of clouds on the upward LW radiation