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Alexander, also known as PhoneSat 2.0 Beta or PhoneSat v2a is a technology demonstration satellite operated by NASA's Ames Research Center, which was launched in April 2013. Part of the PhoneSat programme, it was one of the first three PhoneSat spacecraft, and the first Phonesat-2.0 satellite, to be launched. A PhoneSat-2.0 satellite, ''Alexander'' was built to the single-unit (1U) CubeSat specification, and measures in each dimension. The satellite is based on an off-the-shelf Samsung Electronics Nexus S smartphone which serves in place of an onboard computer. The satellite is equipped with a two-way S-band transponder and solar panels for power generation. The spacecraft uses the phone's gyroscopes, along with a GPS receiver, to determine its position and orientation, and a system of reaction wheels and magnetorquer coils for attitude control. ''Alexander'' was named after Alexander Graham Bell, the inventor of the telephone. The two other PhoneSat spacecraft launched aboard the same rocket were named ''Graham'' and ''Bell''. The three PhoneSat spacecraft, along with the commercial Dove 1 satellite, were launched as secondary payloads aboard the maiden flight of the Antares carrier rocket; flight A-ONE. The primary payload was the Cygnus Mass Simulator. Liftoff occurred at 21:00 UTC on 21 April 2013, from Pad 0A of the Mid-Atlantic Regional Spaceport, following attempts on 17 and 20 April which had been scrubbed due to an umbilical problem and high-level winds respectively. The launch was conducted by Orbital Sciences Corporation, however the CubeSats were launched under a contract with Spaceflight Services, using dispensers produced by ISIS. ''Alexander'', ''Graham'' and ''Bell'' were deployed from a single ISIPod dispenser, while Dove 1 was deployed from a second such dispenser. On 27 April 2013 the satellite was confirmed to have burned up in the atmosphere, with instruments still running up until then. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Alexander (satellite)」の詳細全文を読む スポンサード リンク
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