BackForwardInstrument:  SECCHI/EUVI 

Instrument details
Full name SECCHI / EUV Imager
Purpose To observe emission lines of corona and upper chromosphere
Short description EUV narrow-bandpass Ritchey Chretien telescope (98 mm aperture) for lines of He II (30.4 nm), Fe IX (17.1 nm), Fe XII (19.5 nm) and Fe XV (28.4 nm)
Background Part of the package "SECCHI" (Sun-Earth Connection Coronal and Heliospheric Investigation)
Scanning Technique Array of 2048x2048 detectors. The Sun is observed by two STEREO satellites moving in the plan of Ecliptic with different viewing conditions, so as to implement stereoscopy. Corona view included
Resolution 2500 km at Sun surface
Coverage / Cycle Full Sun disk, one image each 1 min
Mass Power Data Rate


Providing Agency NRL
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2007-01-21 to 2014-10-01
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 EUV spectrometer [from solar orbit, ecliptic, L5]
  • Solar EUV imager [from solar orbit, ecliptic, L5]
  • Solar coronographic imager [from solar orbit, ecliptic, L5]
  • Subcomponent 3
  • Solar coronal magnetic field imager [from solar orbit, ecliptic, L5]
Mission objectives
Primary mission objectives
  • Solar EUV flux
  • Solar EUV image
Opportunity objectives
  • Solar coronagraphic image
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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
Solar EUV flux4 - fairNo specific limitation.Few channels, moderate dynamic range, full solar disc and corona
Solar EUV image4 - fairNo specific limitation.Fluxmetry with coarse spatial resolution, corona view included
Solar coronagraphic image3 - highNo specific limitation.EUV (10-121.6 nm), observed with occultation