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Energetic particle instrument (EPI)

NSSDCA ID: 1997-075B-04

Mission Name: Equator-S
Principal Investigator:Dr. Trevor R. Sanderson


Physically part of the 3DA instrument, EPI consists of an array of solid-state telescopes measuring electrons and ions in the energy range 20 - 226 keV and 20 - 400 keV, respectively, in 6 energy channels and 4 angle channels at a time. During each spacecraft spin the telescopes trace out a large fraction (70%) of the solid-angle sphere.

Alternate Names

  • EPI
  • Equator-S/EPI

Facts in Brief

Mass: 5.1 kg
Power (avg): 4.5 W


  • Space Physics: Magnetospheric Studies
  • Space Physics: Heliospheric Studies

Additional Information

Questions and comments about this experiment can be directed to: Coordinated Request and User Support Office



NameRoleOriginal AffiliationE-mail
Dr. Trevor R. SandersonLead InvestigatorESA-European Space Research and Technology Centre
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