BackForwardInstrument:  IMPACT/MAG 

Instrument details
Full name IMPACT / Magnetometer
Purpose Observation of the vectorial magnetic field in the vicinity of the Sun
Short description Triaxial fluxgate sensors, mounted on booms. Description not available. Presumably, triaxial fluxgate magnetometers (boom mounted). 8 dynamic ranges: ± 4 nT; ± 16 nT; ± 64 nT; ± 256 nT; ± 1024 nT; ± 4096 nT; ± 16,384 nT; and ± 65,536 nT. Resolution ± 16 nT @ maximum of dynamics. Accuracy 0.006 nT
Background Part of the IMPACT (In-situ Measurements of Particles and CME Transients)instrument package
Scanning Technique The Sun is observed by two STEREO satellites moving in the plan of Ecliptic with different viewing conditions, so as to implement stereoscopy
Resolution N/A
Coverage / Cycle Full solar disk, sampling at 0.09 s intervals
Mass Power Data Rate


Providing Agency NASA
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2007-01-21 to 2014-10-01
Last update: 2021-12-04
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
  • Interplanetary magnetic field sensor [from solar orbit, ecliptic, L5]
Mission objectives
Primary mission objectives
  • Interplanetary magnetic field
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Tentative 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
VariableRelevance for measuring this variableOperational limitationsExplanation
Interplanetary magnetic field3 - highNo specific limitation.Interplanetary, vectorial, wide dynamics, coarse resolution