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Cosmic-Ray Isotopic Abundance

NSSDCA ID: 1964-054A-17

Mission Name: OGO 1
Principal Investigator:Dr. Frank B. McDonald


In order to analyze the charge and energy spectra of the primary cosmic radiation, a de/dx vs. e plastic scintillator telescope measured ions with z values between 1 and 8 and with energies in a z-dependent range (for example, for z=1 or 2, the range was 15 to 80 meV/nucleon, for z=6, the range was 25 to 145 MeV/nucleon). Pulse height analysis is performed on 1, 8, or 64 events per sec. Count rates in various telescope modes are also obtained. Three orthogonal geiger counter telescopes were also used to monitor protons above 28 MeV and 70 MeV. The detectors functioned normally while the spacecraft was tracked. Good data were obtained from launch until November, 1969. Coverage was high during fall and spring of each year, and low during winter and summer.

Alternate Names

  • OGO 1,Cosmic Ray Isotopic Abundance (A-06)
  • OGO1/Cosmic-RayIsotopicAbundance


  • 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. George H. LudwigOther InvestigatorNOAA Environmental Research Laboratories
Dr. Frank B. McDonaldPrincipal InvestigatorNASA Goddard Space Flight Center
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