BackForwardInstrument:  WFI (Solar) 

Instrument details
Acronym WFI (Solar)
Full name Wide-field Imager
Purpose To make 3-D images of the sun's corona, or atmosphere
Short description Telescope that observes the solar wind and provides 3-D images of clouds and shocks as they approach and pass the spacecraft. VIS imaging fluxmeter
Background Consolidated technology
Scanning Technique Sun pointing from a solar orbit, also crossing the corona at perihelion and viewing the interplanetary space as the satellite moves along its orbit
Resolution Changing with the distance from the Sun. Around 150 km at perihelion
Coverage / Cycle Full solar disk at 10 s intervals
Mass Power Data Rate


Providing Agency NRL
Instrument Maturity Flown on an R&D satellite
Utilization Period: ≥2018-10 to ≥2025
Last update: 2017-05-19
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
Mission objectives
Primary mission objectives
  • Solar VIS flux
  • Solar VIS image
Secondary mission objectives
  • Solar white light 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 VIS flux5 - marginalNo specific limitation.Wide dynamic range
Solar VIS image4 - fairNo specific limitation.Fluxmetry with high spatial resolution
Solar white light image4 - fairNo specific limitation.Fluxmetry with high spatial resolution, good coverage of the VIS range