BackForwardInstrument:  IVM 

Instrument details
Acronym IVM
Full name In-situ Ion Velocity Meter
Purpose Measures ion drift velocity in the spacecraft reference frame, the ion temperature and the total ion number density at the location of the spacecraft.
Short description The IVM consists of two planar thermal ion sensors, a retarding potential analyzer (RPA) and an ion drift meter (IDM)
Background Derived from C/NOFS CINDI project
Scanning Technique Magnetospheric scanning along a low-inclination LEO
Resolution N/A
Coverage / Cycle Large fraction of magnetosphere and ionosphere
Mass Power Data Rate


Providing Agency NASA
Instrument Maturity Flown on an R&D satellite
Utilization Period: ≥2018-02 to ≥2022
Last update: 2017-04-22
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
Mission objectives
Primary mission objectives
  • Electron Density
  • Ionospheric plasma density
Secondary mission objectives
  • Electric Field
  • Ionospheric plasma velocity
Opportunity objectives
  • Ionospheric Scintillation
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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
Electric Field4 - fairNo specific limitation.Earth's limb. Electric field
Ionospheric plasma density4 - fairNo specific limitation.Earth's limb. Ionospheric plasma density
Ionospheric plasma velocity3 - highNo specific limitation.Eart's limb. Plasma velocity
Electron Density4 - fairNo specific limitation.Platform. Electron density
Ionospheric Scintillation1 - primaryNo specific limitation.Earth's limb. Scintillations