BackForwardInstrument:  SUVI (FY-4) 

Instrument details
Acronym SUVI (FY-4)
Full name Solar Extreme-UltraViolet Imager
Purpose To monitor the solar active regions, solar flares, and solar filaments
Short description Sun imaging in 4 channels of EUV: 9.4 nm, 17.1 nm (Fe-IX), 21.1 nm and 30.4 nm (He-II)
Background Similar to the GOES SUVI
Scanning Technique Sun pointing from GEO
Resolution 1500 km at the Sun surface (guess)
Coverage / Cycle Field of view of 42'
Mass Power Data Rate


Providing Agency CMA
Instrument Maturity Flown on operational programme
Utilization Period: 2025 to 2040
Last update: 2021-12-16
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
  • Solar and space environment monitors
  • Solar activity monitor
WIGOS Subcomponents
  • Subcomponent 2
  • Solar magnetograph, solar EUV/X-ray imagery and EUV/X-ray irradiance, both on the Earth-Sun line and off the Earth-Sun line
  • Solar EUV spectrometer [from L1, GEO, LEO]
  • Solar EUV imager [from L1, GEO, LEO]
  • Subcomponent 3
  • UV spectral imagery (e.g. GEO, HEO, MEO, LEO)
  • EUV spectrometer [from GEO, HEO, MEO, LEO]
Mission objectives
Primary mission objectives
  • Solar EUV image
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
Solar EUV flux4 - fairNo specific limitation.Few channels, moderate dynamic range
Solar EUV image*3 - highNo specific limitation.Fluxmetry with high spatial resolution