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Prospero (satellite)
The Prospero satellite, also known as the X-3, was launched by the United Kingdom in 1971. It was designed to undertake a series of experiments to study the effects of space environment on communications satellites and remained operational until 1973, after which it was contacted annually for over twenty-five years.〔 Although Prospero was the first British satellite to have been launched successfully by a British rocket, the first British satellite placed in orbit was Ariel 1, launched in April 1962 on an American rocket.
Prospero has the COSPAR (NSSC ID) designation 1971-093A and the US Space Command satellite catalogue number 05580.
==Construction==
Prospero was built by the Royal Aircraft Establishment in Farnborough.〔 Initially called Puck,〔 it was designed to conduct experiments to test the technologies necessary for communication satellites, such as solar cells, telemetry and power systems. It also carried a micrometeoroid detector, to measure the presence of very small particles. When the Ministry of Defence cancelled the Black Arrow programme, the development team decided to continue with the project,〔 but renamed the satellite Prospero when it was announced it would be the last launch attempt using a British rocket.〔 An earlier Black Arrow launch, carrying the Orba X-2 satellite, had failed to achieve orbit after a premature second-stage shut down.
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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