BackForwardInstrument:  EFI (SWARM) 

Instrument details
Acronym EFI (SWARM)
Full name Electric Field Instrument
Purpose Observation of the electric field along the orbit
Short description Imaging electrostatic analyzer with electro-optical detection, including a Langmuir probe
Background Part of a package of instruments for Solid Earth and Space Weather observation
Scanning Technique Formation flight of 3 satellites in coordinated orbits for 3-D field reconstruction
Resolution N/A
Coverage / Cycle Large fraction of magnetosphere and ionosphere
Mass 6 kg Power 10 W Data Rate 6 kbps


Providing Agency CSA
Instrument Maturity Backed by strong heritage
Utilization Period: 2014 to 2025
Last update: 2021-12-10
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
  • Field or radiowave sensor
WIGOS Subcomponents
  • Subcomponent 2
  • Magnetospheric energetic particles and magnetometers
  • Electric field sensor [in LEO and cross magnetosphere]
  • Ionospheric electron density sensor [in LEO and cross magnetosphere]
  • Ionospheric plasma density
Mission objectives
Primary mission objectives
  • Electric Field
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
Electric Field*4 - fairNo specific limitation.Earth's limb. Electric field
Ionospheric plasma density4 - fairNo specific limitation.Earth's limb. Ionospheric plasma density
Electron Density4 - fairNo specific limitation.Platform. Electron density