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The OV1-16 satellite was a high-density, 63-cm in diamspherical spacecraft specifically designed to obtain accurate density data at very low altitudes (100 km). The principal active experiment was a triaxial accelerometer that measured satellite acceleration near perigee. Atmospheric densities were then computed from these data. The sphere also contained a c-band tracking beacon for drag density determination. Batteries and appropriate logic, timing, telemetry, and command and control equipment were also aboard. There was no onboard tape recorder, but real-time telemetry data were obtained during 199 passes over 12 stations.

Alternate Names

  • 03319
  • Cannon Ball I

Facts in Brief

Launch Date: 1968-07-11
Launch Vehicle: Atlas
Launch Site: Vandenberg AFB, United States
Mass: 272 kg

Funding Agency

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


  • Engineering
  • Earth Science

Additional Information

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



NameRoleOriginal AffiliationE-mail
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