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DSP F19 was a USAF Defense Support Program missile early warning satellite equipped with an infrared telescope to detect rocket launches. The Titan 4B rocket placed the IUS upper stages and payload into a 188 km x 718 km x 28.6 degree parking orbit. The first stage on the IUS burned at 18:14 GMT and put the second stage and payload into a geosynchronous transfer orbit. The IUS second stage fired at 23:34 GMT. However, the two stages of the IUS failed to separate completely. At least one connector remained attached. This meant the second stage motor nozzle did not extend properly. When the stage fired, the vehicle tumbled during the burn and the satellite was left out of control in a useless orbit.

Alternate Names

  • USA 142
  • 25669
  • DSPF19

Facts in Brief

Launch Date: 1999-04-09
Launch Vehicle: Titan 4B
Launch Site: Cape Canaveral, United States

Funding Agency

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


  • Surveillance and Other Military

Additional Information

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

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