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ERS 17



The Environmental Research Satellite 17 carried a set of five radiation detectors designed to measure charged particles, X rays, gamma rays, and cosmic rays in the near-earth environment. The satellite was spin stabilized with a spin rate of approximately 6 rpm. A 16-channel PAM/FM/PM telemeter using a subcommutator and IRIG (Inter-Range Instrumentation Group) FM channel 5 was employed. Each channel was sampled for 4.5 s every 72 s. Data coverage was obtained at about an 86% level for the initial 4 weeks of operation and at about a 26% level thereafter until November 3, 1965, when the transmitter ceased. Approximately 1500 h of data were obtained.

Alternate Names

  • ORS 3(A)
  • ORS 3
  • 01460
  • ERS17

Facts in Brief

Launch Date: 1965-07-20
Launch Vehicle: Atlas
Launch Site: Cape Canaveral, United States
Mass: 5.5 kg

Funding Agency

  • Department of Defense-Department of the Air Force (United States)


  • Space Physics
  • Solar Physics
  • Astronomy

Additional Information

Questions and comments about this spacecraft can be directed to: Dr. H. Kent Hills



NameRoleOriginal AffiliationE-mail
Mr. R. J. MartinProject EngineerTRW Systems Group
Dr. J. M. DenneyProject ManagerTRW Systems Group
Dr. James I. VetteProject ScientistAerospace Corporation
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