The 206-foot (63-meter) tall rocket, built by United Launch
Alliance, a partnership of Lockheed Martin and Boeing, lifted off at
7:28 p.m. EDT and blazed through partly cloudy skies as it headed
into orbit, a United Launch Alliance live webcast showed.
Launch of two satellites for the U.S. Air Force’s recently
declassified Geosynchronous Space Situational Awareness Program, or
GSSAP, had been slated for July 23, but was delayed one day to
resolve a technical issue with ground support equipment and then
three more times by poor weather.
Once in orbit, the GSSAP satellites, built by Orbital Sciences Corp,
will drift above and below a 22,300-mile (35,970-km) high zone that
houses most of the world's communications satellites and other
General William Shelton, head of Air Force Space Command, likened
GSSAP to a “neighborhood watch program” that will keep tabs on other
The program "will bolster our ability to discern when adversaries
attempt to avoid detection and to discover capabilities they may
have which might be harmful to our critical assets at these higher
altitudes," Shelton said during a speech in February that unveiled
the once-classified program.
GSSAP also will track orbital debris, which could pose a threat to
operational satellites. Current ground-based radar systems and
telescopes can monitor objects that are bigger than about 4 inches
(10 cm) in diameter. The trash includes spent rocket bodies and the
remains of a satellite that China exploded in 2007 as part of a
widely condemned anti-satellite missile test.
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The Air Force currently tracks about 23,000 pieces of space junk.
Costs and technical details of the GSSAP program were not released.
The rocket also carries a small secondary satellite that will be
used for engineering tests.
The Air Force mission bumped NASA’s debut test flight of its Orion
deep space capsule, which also will fly on a Delta 4 rocket. NASA’s
launch is now targeted for December.
(Reporting by Irene Klotz in Mojave, California; Editing by Eric
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