BackForwardInstrument:  PMAI 

Instrument details
Acronym PMAI
Full name Short-wave Infrared Polarized Multi-Angle Imager
Purpose Experimental instrument for aerosol and cloud measurements.
Short description
  • Imager with 3 spectral bands centred at 1.03um, 1.370um, 1.640 um polarized. Similar to POLDER and 3MI.
  • Calibration monitoring here
Background

Experimental instrument only for FY-3G.
Scanning Technique

Views at 14 angles out to ±40°
Resolution 3km at nadir
Coverage / Cycle 700 km swath covered on surface
Mass Power Data Rate

 

Providing Agency CMA
Instrument Maturity Backed by strong heritage
Utilization Period: 2023 to 2028
Last update: 2024-09-09
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 optical radiometer or spectrometer
  • Moderate resolution optical imager
WIGOS Subcomponents
  • Subcomponent 2
  • Multi-angle, multi-polarization radiometers
  • Multi-angle, multi-polarization radiometer
Mission objectives
Primary mission objectives
  • Aerosol Optical Depth
  • Aerosol column burden
  • Aerosol dust concentration
  • Aerosol effective radius
  • Aerosol mass mixing ratio
  • Aerosol type
  • Aerosol volcanic ash
  • Cloud drop effective radius
  • Cloud ice effective radius
  • Cloud optical depth
  • Cloud type
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
Aerosol column burden*1 - primaryCloud sensitive.. Daylight only.VIS (with narrow bandwidth), NIR and SWIR channels viewing under different angles
Aerosol effective radius*1 - primaryCloud sensitive.. Daylight only.VIS (with narrow bandwidth), NIR and SWIR channels viewing under different angles
Aerosol mass mixing ratio*1 - primaryCloud sensitive.. Daylight only.VIS (with narrow bandwidth), NIR and SWIR channels viewing under different angles
Aerosol Optical Depth*1 - primaryCloud sensitive.. Daylight only.VIS (with narrow bandwidth), NIR and SWIR channels viewing under different angles
Aerosol type*1 - primaryCloud sensitive.. Daylight only.VIS (with narrow bandwidth), NIR and SWIR channels viewing under a few different angles
Leaf Area Index (LAI)3 - highCloud sensitive.. Daylight only.NIR and SWIR channels