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Space Environment Monitor (SEM)

NSSDCA ID: 1981-076A-02

Mission Name: GMS 2
Principal Investigator:Dr. Tsuyoshi Kohno


The Space Environment Monitor (SEM) experiment observed the in situ charged particle environment. Solar protons (1 to 500 MeV), alpha particles (8 to 390 MeV), and solar electrons (greater than 2 MeV) were discriminated, and their respective energies were monitored by means of a number of solid-state detectors.

Alternate Names

  • GMS2/SEM
  • SEM


  • Space Physics: Ionospheric 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. Tsuyoshi KohnoPrincipal InvestigatorInstitute for Physical and Chemical
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