BackForwardInstrument:  OVM 

Instrument details
Acronym OVM
Full name Overhauser Magnetometer
Purpose Observation of the magnetic field along the orbit
Short description Overhauser proton-precession scalar magnetometer, absolute measurement error < 1 nT. Dynamic range 16000-64000 nT, resolution 0.1 nT @ maximum of the dynamics
Background Part of a package of instruments for Space Weather and Earth's interior observation. Flown both on Ørsted and within the SAC-C MMC (Magnetic Mapping Payload) / Ørsted-2
Scanning Technique In-situ measurement in a high-inclination drifting LEO
Resolution N/A
Coverage / Cycle Sampling at 1 s intervals
Mass 2.5 kg Power 3 W Data Rate


Providing Agency CNES
Instrument Maturity Flown on an R&D satellite
Utilization Period: 1999 to 2014
Last update: 2022-07-25
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
Mission objectives
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 field3 - highNo specific limitation.Platform, scalar, wide dynamics, high resolution