BackForwardInstrument:  MGF (ERG) 

Instrument details
Acronym MGF (ERG)
Full name Magnetic field experiment
Purpose Measurement of the magnetic field along the satellite HEO cross the magnetosphere
Short description Detailed description not yet available. Presumably, vector magnetometer covering the dynamic range +/-65,536 nT with a resolution of 1 nT @ maximum of the dynamic range
Background Companion of the Plasma Wave Experiment (PWE) on ERG
Scanning Technique Volumetric exploration of the magnetosphere as the satellite travels along the HEO with perigee 300 km and apogee 30,000 km whilst spinning at 1 round / 8 s
Resolution N/A
Coverage / Cycle Full magnetospheric volume, more frequently in low-middle latitudes, consistently with the 31° orbital inclination
Mass Power Data Rate


Providing Agency JAXA
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2017 to 2033
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]
Mission objectives
Primary mission objectives
  • Geomagnetic 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
Geomagnetic field*2 - very highNo specific limitation.Magnetosphere, vectorial, wide dynamics, high resolution