BackForwardInstrument:  ASM 

Instrument details
Acronym ASM
Full name Absolute Scalar Magnetometer
Purpose Observation of the magnetic field along the orbit
Short description Optically pumped 4He magnetometer based on an electronic magnetic resonance whose effects are amplified by a laser pumping process. Dynamic range: 15000-65000 nT with resolution 0.1 nT @ maximum of the dynamics
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: sampling at 20 ms intervals
Mass 3.5 kg Power 5.3 W Data Rate


Providing Agency CNES
Instrument Maturity Backed by strong heritage
Utilization Period: 2014 to 2025
Last update: 2021-12-08
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 LEO
  • 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*3 - highNo specific limitation.Interplanetary space, scalar, wide dynamics