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This spacecraft was a small observatory in a near-polar orbit with eight different sensors on board. It was designed to observe various magnetospheric parameters and their interrelationships. Sensors, which observed energetic protons and Alpha particles, also provided real-time observations for use by the U.S. Air Force Air Weather Service.

Alternate Names

  • 09007
  • S74-2
  • SESP S74-2A
  • SS74-2A

Facts in Brief

Launch Date: 1976-07-08
Launch Vehicle: Titan III-D
Launch Site: Vandenberg AFB, United States

Funding Agency

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


  • Space Physics

Additional Information

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



NameRoleOriginal AffiliationE-mail
Col Richard B. KehlProject ManagerUS Air Force Space Division
Dr. H.E. Frank WangProject ScientistAerospace Corporation
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