Press Releases: "ORBITAL'S PEGASUS ROCKET SUCCESSFULLY LAUNCHES NASA/CANADIAN SPACE AGENCY SCIENTIFIC SATELLITE
SCISAT-1 Mission Was 21st Consecutive Successful Launch for Pegasus

(Dulles, VA 13 August 2003) -- Orbital Sciences Corporation (NYSE: ORB) announced today that its Pegasus® space launch vehicle successfully launched the Scientific Satellite (SCISAT-1) Atmospheric Chemistry Experiment (ACE) spacecraft for the National Aeronautics and Space Administration (NASA) and the Canadian Space Agency. In a mission that took place on Tuesday, August 12, from Vandenberg Air Force Base, California, the 330-pound SCISAT-1 spacecraft was accurately delivered into its targeted orbit approximately 400 miles above the Earth, inclined at 73.9 degrees to the equator.

The powered flight sequence for the SCISAT-1 mission took about 11 minutes, from the time the Pegasus rocket was released from its L-1011 carrier aircraft at approximately 10:10 p.m. (EDT) to the time that the satellite was deployed into orbit. It was the 35th launch of the Pegasus rocket and its 21st consecutive successful mission. "
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