BackForwardInstrument:  CIS 

Instrument details
Acronym CIS
Full name Cluster Ion Spectrometry experiment
Purpose To study the dynamics of magnetized plasma structures in the vicinity of the Earth's magnetosphere (physics of the bow shock, the magnetopause boundary, the polar cusp, the geomagnetic tail, and the plasma sheet)
Short description Association of two spectrometers, one for the energy range 0.02-40 keV/q (major ion species), one for the energy range 0.003-40 keV/q. Z from 1 to 8
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 CNES
Instrument Maturity Flown on an R&D satellite
Utilization Period: 2000 to ≥2020
Last update: 2017-06-05
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
Mission objectives
Primary mission objectives
  • Alpha particles differential directional flux
  • Heavy ion angular flux energy and mass spectrum
  • Heavy ion flux energy and mass spectrum
  • Proton 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
Proton differential directional flux1 - primaryNo specific limitation.Cluster flown through the magnetosphere, low energy (up to 40 keV)
Alpha particles differential directional flux3 - highNo specific limitation.Cross-magnetosphere satellite cluster. Low-medium energy range (<10 up to 100 MeV/n)
Heavy ion flux energy and mass spectrum1 - primaryNo specific limitation.Cross-magnetosphere satellite cluster. Low-medium energy range (<10 up to 100 MeV/n)
Heavy ion angular flux energy and mass spectrum1 - primaryNo specific limitation.Cross-magnetosphere satellite cluster. Low-medium energy range (<10 up to 100 MeV/n)