BackForwardInstrument:  DSLP 

Instrument details
Acronym DSLP
Full name Dual Segmented Langmuir Probe
Purpose Observation of plasma density, electron temperature and satellite potential in the ionosphere
Short description Measuring current-voltage characteristics to derive the density of space plasma and its variations in the range 100 to 5,000,000 particles/cm3, the electron temperature in the range 500-3000 K, and the satellite potential in the range of ± 5 V
Background Part of a package of instruments for observation of solar activity and ionospheric effects
Scanning Technique In-situ measurement in a dawn-dusk orbit
Resolution N/A
Coverage / Cycle N/A
Mass Power Data Rate


Providing Agency ESA
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2009 to 2024
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.Platform. Electric field
Ionospheric plasma density*4 - fairNo specific limitation.Platform. Ionospheric plasma density
Electron Density*4 - fairNo specific limitation.Platform. Electron density
Electrostatic charge3 - highNo specific limitation.Platform. Electrostatic charge