BackForwardInstrument:  SECCHI/COR-2 

Instrument details
Acronym SECCHI/COR-2
Full name SECCHI / Coronagraph imager 2
Purpose Observation of the K-corona, the F-corona and of Coronal Mass Ejections (CMEs)
Short description Externally occulted Lyot coronagraph, companion of COR-1 for internally. Bandpass 650-750 nm, 3 white light images at 3 different polarization angles, 30.5 mm aperture telescope
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 22,000 km at the Sun surface
Coverage / Cycle Full Sun disk each 5 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 VIS spectrometer [from solar orbit, ecliptic, L5]
  • Solar magnetic field sensor [from solar orbit, ecliptic, L5]
  • Solar electric field sensor [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 coronagraphic image
Secondary mission objectives
  • Solar electric field
  • Solar magnetic field
Opportunity objectives
  • Solar VIS flux
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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 VIS flux2 - very highLimited to the solar corona.Moderate dynamic range, solar disc occulted, polarisation capability
Solar magnetic field4 - fairLimited to the solar corona.Fluxmetry with coarse spatial resolution, polarimetry exploited, solar disc occulted
Solar electric field3 - highLimited to the solar corona.Fluxmetry with coarse spatial resolution, polarimetry exploited, corona view included
Solar coronagraphic image2 - very highNo specific limitation.VIS (400-700 nm), observed with occultation