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Solar Cosmic Rays

NSSDCA ID: 1964-054A-12

Mission Name: OGO 1
Principal Investigator:Prof. Kinsey A. Anderson


This instrumentation consisted of a cesium iodide crystal surrounded by a plastic anticoincidence shield and optically coupled to a photomultiplier tube. The system also contained a 32-channel pulse-height analyzer. Although the principal objective of this experiment was to measure 3- to 90-MeV solar protons, the detector had no ability to discriminate between different kinds of particles. The system was mounted in one of the two SOEPs and had a 38-deg acceptance cone angle. Inflight calibration was provided. Counts in groups of four channels, accumulated over 31/32 of the telemetry frame time (1.152, 0.144, or 0.018 s), were read out during successive telemetry frames. Some time before the experiment was turned on, the anticoincidence system failed. This resulted in high background rates due to galactic cosmic rays. Thus, the data were useful for studies of event morphology but not for determination of absolute fluxes. Although the detector axis was intended to point toward the sun, a malfunction in the OGO 1 attitude control system prevented this. For further details, see Kahler, S. W., et al., Solar Physics, v. 2, p. 179, 1967. NSSDC has all the useful data that exist from this investigation.

Alternate Names

  • OGO1/SolarCosmicRays


  • 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
Mr. George H. PittOther InvestigatorUniversity of California, Berkeley
Prof. Kinsey A. AndersonPrincipal InvestigatorUniversity of California,
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