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SpaceX SES-9 launch aborted at last second

SpaceX dramatically aborted its third attempt to launch the SES 9 mission today at literally the last second. At 7:21 pm EST, the lift off from Space Launch Complex 40 at Cape Canaveral Air Force Station, Florida, was called off with the order to shutdown the engines of the Falcon 9 rocket at the moment of ignition. Today's launch would have been SpaceX's most ambitious to date, as it was to be the first attempt at a powered landing of the Falcon 9 on a sea barge after returning from a geostationary transfer orbit launch.
 /ШУУД ҮЗЭХ/

Today's abort came after a series of delays of the SES-9 mission. Two previous launch aborts on Wednesday and Thursday last week were due to problems with the supercooled liquid oxygen, followed by a range safety issue on Sunday that triggered a last-minute hold. According to the US Air Force, a boat had strayed into the downrange area of the rocket's flight path.

The SES 9 mission is intended to place the SES-9 satellite into a transfer orbit that will place it 22,236 mi (35,786 km) above the Earth as part of 50-satellite constellation. There it will provide coverage for up to 26,000 surface vessels annually on high-traffic maritime routes in the Asia-Pacific region over the next 15 years.
The purpose of the barge landing is to further develop the technology needed to further SpaceX's goal of creating a completely reusable launch system. Part of this strategy involves the use of drone barges, which will allow the Falcon 9 booster to land downrange from a variety of trajectories that would prohibit a touchdown on dry land.

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