BackForwardInstrument:  EMFISIS 

Instrument details
Full name Electric and Magnetic Field Instrument Suite and Integrated Science
Purpose To focus on the important role played by magnetic fields and plasma waves in the processes of radiation belt particle acceleration and loss
Short description Complex of a tri-axial fluxgate magnetometer, a tri-axial search coil magnetometer and a sweep frequency receiver. Dynamic range: ±4 to ±65556 nT with resolution ±0.1 nT @ maximum of dynamics. Oscillations range: 0.01-12 kHz for both magnetic and electric fields
Background Part of a package of instruments moving across the Van Allen belts in the Magnetosphere
Scanning Technique 2 satellites moving to different positions into the Magnetosphere
Resolution N/A
Coverage / Cycle Full magnetospheric volume; sampling at 0.1 s intervals
Mass 27.4 kg Power 15.5 W Data Rate 12 kbps


Providing Agency NASA
Instrument Maturity Backed by strong heritage
Utilization Period: 2012-10-28 to 2019-10-18
Last update: 2021-10-02
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
  • Geomagnetic field sensor [in LEO and cross magnetosphere]
  • Electric field sensor [in LEO and cross magnetosphere]
  • Ionospheric total electron content sensor [at LEO and cross magnetosphere]
  • Ionospheric electron density sensor [in LEO and cross magnetosphere]
Mission objectives
Primary mission objectives
  • Electron Density
  • Geomagnetic field
  • Ionospheric plasma density
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
Geomagnetic field*1 - primaryNo specific limitation.Cluster in magnetosphere, vectorial, wide dynamics, high resolution
Electric Field2 - very highNo specific limitation.Electric field measured by magnetic and electric field oscillations
Ionospheric plasma density*1 - primaryNo specific limitation.Ionospheric plasma density measured through observation of oscillations of the magnetic and electric fields
Electron Density*2 - very highNo specific limitation.Electron density measured through observation of oscillations of the magnetic and electric fields