BackForwardInstrument:  FGM (FY4) 

Instrument details
Acronym FGM (FY4)
Full name Fluxgate Magnetometer
Purpose To measure the background magnetic field to identify and time the abrupt reconfigurations of the magnetosphere during onset of solar storms.
Short description Measures the external magnetic field through the modulation induced on the magnetic field generated in a onboard two-ring coil. Dynamic range ±0.1 to ±600 nT, resolution ±0.06 nT at the maximum of the dynamics.
Background A new sensor embarked on FY-4B.
Scanning Technique N/A
Coverage / Cycle
Mass Power Data Rate


Providing Agency CMA
Instrument Maturity Flown on operational programme
Utilization Period: 2021 to 2028
Last update: 2022-11-28
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 1
  • In-situ plasma probes, and energetic particle spectrometers and magnetometers at GEO and LEO, and magnetic field at GEO
  • Magnetometer at GEO
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.