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Energetic Electron and Proton Detectors

NSSDCA ID: 1963-038C-01

Mission Name: 1963-038C
Principal Investigator:Dr. Carl O. Bostrom


The charged particle experiment on 1963-038C consisted of an array of solid-state detectors. One electron spectrometer consisting of five detectors measured the directional intensity of electrons with energies greater than 0.28, 1.2, 2.4, and 3.6 MeV. Each of two proton spectrometers utilized two sensors and three electronic discrimination levels in various combinations to measure the directional intensity of protons in the energy ranges 1.2 to 2.2 MeV, 2.2 to 8.5 MeV, 8.5 to 25 MeV, and 25 to 100 MeV. Three omnidirectional detectors measured the sum of electron and proton intensities (Ie and Ip) according to the following: Ie (E>.28 MeV) plus Ip (E>2.2 MeV), Ie (E>.41 MeV) plus Ip (E>8.5 MeV), and Ie (E>1.8 MeV) plus Ip (E>25 MeV). The electron spectrometer and one proton spectrometer were oriented with their axes normal to the geomagnetic field. All other detectors were parallel to the field looking upward when in the northern hemisphere. Most detectors were sampled 22.9 times per min. The lowest energy omnidirectional detector was sampled 45.8 times per min. Except for the greater than 3.6-MeV electron spectrometer detector, which had been unusable most of the time due to noise, and one of the proton spectrometers, which was intermittent for periods during the first month, the experiment has worked well through the spacecraft lifetime. After August 1969, data were acquired only infrequently and on special experimenter request. Very little data were acquired after 1970.

Alternate Names

  • 1963-038C/EnergeticElectronandProtonDetectors

Funding Agency

  • Department of Defense-Department of the Navy (United States)


  • Space Physics: Magnetospheric Studies

Additional Information

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



NameRoleOriginal AffiliationE-mail
Dr. Donald J. WilliamsOther InvestigatorApplied Physics
Dr. Carl O. BostromPrincipal InvestigatorApplied Physics Laboratory
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