BackForwardInstrument:  VIDI 

Instrument details
Acronym VIDI
Full name Velocity, Ion Density and Irregularities
Purpose Space weather around the platform environment
Short description Complex of two instruments: 1) IVM (Ion Velocity Meter) to measure the electric field perpendicular to the magnetic field and the ion motions parallel to the magnetic field through measurement of the ion drift velocity vector; and 2) SPLP (SSAEM Planar Langmuir Probe) to measure absolute ion density, ion density fluctuations, and electron temperature
Background New development
Scanning Technique Crossing the magnetosphere along a low-inclination orbit
Resolution N/A
Coverage / Cycle Large fraction of magnetosphere and ionosphere
Mass 7 kg Power 10 W Data Rate 10 kbps


Providing Agency USAF
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2020 to 2026
Last update: 2021-12-09
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
  • Magnetospheric energetic particles and magnetometers
  • Electric field sensor [in LEO and cross magnetosphere]
  • Ionospheric electron density sensor [in LEO and cross magnetosphere]
  • Ionospheric plasma density
Mission objectives
Primary mission objectives
  • Electron Density
  • Ionospheric plasma density
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
Electric Field4 - fairNo specific limitation.Earth's limb. Electric field
Ionospheric plasma density*4 - fairNo specific limitation.Earth's limb. Ionospheric plasma density
Ionospheric plasma velocity1 - primaryNo specific limitation.Eart's limb. Plasma velocity
Electron Density*4 - fairNo specific limitation.Platform. Electron density
Ionospheric Scintillation2 - very highNo specific limitation.Earth's limb. Scintillations