BackForwardInstrument:  MGF 

Instrument details
Acronym MGF
Full name Magnetic Field Measurement
Purpose To study the transport dynamics of mass, momentum, and energy between the magnetospheric and ionospheric plasma and to study the merging in the magnetotail
Short description Fluxgate and search coil magnetometers for DC and AC measurements, respectively. Two sets of the fluxgate magnetometers were deployed at distances of 4 and 6 m along the 6 m mast. Measurement ranges: ± 16 nT, ± 64 nT, ± 256 nT, ± 1024 nT, ±4 096 nT, ± 16384 nT, and ± 65536 nT, Resolution ± 8 nT @ maximum of the dynamics, accuracy 0.006 nT
Background Part of a package of instruments to observe the Magnetosphere by navigating across its tail
Scanning Technique Travelling cross the Magnetosphere in a highly-elliptical orbit
Resolution N/A
Coverage / Cycle Full magnetospheric volume; sampling at 0.062 s intervals
Mass Power Data Rate


Providing Agency JAXA
Instrument Maturity Flown on an R&D satellite
Utilization Period: 1992-10-02 to ≥2022
Last update: 2021-12-07
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.

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Note: * Primary mission objective.
VariableRelevance for measuring this variableOperational limitationsExplanation
Geomagnetic field*2 - very highNo specific limitation.Magnetosphere, vectorial, wide dynamics, coarse resolution