BackForwardInstrument:  XEUVI 

Instrument details
Acronym XEUVI
Full name Solar X-ray and Extreme Ultraviolet Imager
Purpose Solar imagery in the X-ray and EUV ranges
Short description 6-channels radiometer, five in X-ray (0.6-8 nm, 0.6-6 nm, 0.6-5 nm, 0.6-2 nm, 0.6-1.6 nm, and 0.6-1.2 nm), and one in EUV at 19.5 nm (Fe-XII)
Background New development
Scanning Technique Sun-pointing from a dawn-dusk orbit. Imaging capability. Field of View: 42′± 2′
Resolution 7500 km for X-ray, 3750 km for EUV, at Sun surface
Coverage / Cycle ≤12 min for X-ray, ≤2 min for EUV
Mass Power Data Rate


Providing Agency CMA
Instrument Maturity Flown on operational programme
Utilization Period: 2021 to 2029
Last update: 2022-05-09
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
  • Solar and space environment monitors
  • Solar activity monitor
WIGOS Subcomponents
  • Subcomponent 1
  • X-ray spectrograph on GEO orbit
  • X-ray spectrometer at LEO
  • 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 X-ray spectrometer [from L1, GEO, LEO]
  • Solar X-ray imager [from L1, GEO, LEO]
  • 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)
  • X-ray spectrometer [from GEO, HEO, MEO, LEO]
  • EUV spectrometer [from GEO, HEO, MEO, LEO]
Mission objectives
Primary mission objectives
  • Solar EUV flux
  • Solar EUV image
  • Solar X-ray flux
  • Solar X-ray 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 X-ray flux*1 - primaryNo specific limitation.Several channels, wide dynamic range
Solar X-ray image*4 - fairNo specific limitation.Fluxmetry with coarse spatial resolution
Solar EUV flux*4 - fairNo specific limitation.Few channels, moderate dynamic range
Solar EUV image*4 - fairNo specific limitation.Fluxmetry with coarse spatial resolution