BackForwardInstrument:  PEACE 

Instrument details
Acronym PEACE
Full name Plasma Electron and Current Analyzer
Purpose To study the 3-D velocity distribution of electrons in the vicinity of its host spacecraft
Short description Assemblage of two electron sensor devices: a Low Energy Electron Analyzer (LEFA), energy range = 0-100 eV; and a High Energy Electron Analyzer (HEFA), energy range = 0.1-30 keV.
Background Part of a package of instruments for the study of the Magnetosphere
Scanning Technique Formation flight of 4 satellites in coordinated high-elliptical orbits cross the Magnetosphere for 3-D field reconstruction
Resolution N/A
Coverage / Cycle Magnetospheric volume
Mass Power Data Rate


Providing Agency ESA
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2000 to ≥2025
Last update: 2021-12-06
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
  • Energetic particle spectrometer
WIGOS Subcomponents
  • Subcomponent 2
  • Electron sensor [cross magnetosphere]
Mission objectives
Primary mission objectives
  • Electron differential directional flux
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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
Electron differential directional flux1 - primaryNo specific limitation.Cluster flown through the magnetosphere, low energy (up to 40 keV)