Signals intelligence collection and analysis network / From Wikipedia, the free encyclopedia

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ECHELON, originally a secret government code name, is a surveillance program (signals intelligence/SIGINT collection and analysis network) operated by the five signatory states to the UKUSA Security Agreement:[1] Australia, Canada, New Zealand, the United Kingdom and the United States, also known as the Five Eyes.[2][3][4]

A radome at RAF Menwith Hill, a site with satellite uplink capabilities believed to be used by ECHELON
RAF Menwith Hill, North Yorkshire, England
Misawa Air Base Security Operations Center (MSOC), Aomori Prefecture, Japan

Created in the late 1960s to monitor the military and diplomatic communications of the Soviet Union and its Eastern Bloc allies during the Cold War, the ECHELON project became formally established in 1971.[5][6] By the end of the 20th century, it had greatly expanded.[7]

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