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USA-243
USA-243, also known as WGS-5, is an American military communications satellite. It was the fifth satellite to be launched as part of the Wideband Global SATCOM programme, and the second Block II spacecraft.
Constructed by Boeing, USA-243 is based on the BSS-702HP satellite bus. It had a mass at liftoff of ,〔 and a design life of 14 years.〔 Its two solar panels generate upwards of 11 kilowatts of power.〔 The spacecraft is equipped with X and Ka-band transponders. An R-4D bipropellant rocket motor and four XIPS-25 ion engines provide propulsion.〔
USA-243 was launched by United Launch Alliance. A Delta IV-M+(5,4) rocket, Delta 362, was used to place it into a supersynchronous transfer orbit, from which the spacecraft will be manoeuvred into geostationary orbit. The launch took place from Space Launch Complex 37B at the Cape Canaveral Air Force Station, with liftoff occurring at 00:27 UTC on 25 May 2013. A launch attempt 24 hours previously was scrubbed due to a problem with a helium pressurisation line.〔 The launch was successful.
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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