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Geosynchronous
1965
Intelsat 1 ("Early Bird") 1st coml geosynchronous communication satellite
1965
Syncom 3, 1st geosynchronous communications satellite, passes from civilian to military control
1963
U.S. Syncom 2, 1st geosynchronous communications satellite, launched
1962
Telstar, 1st geosynchronous communications satellite, launched
1945
Arthur C. Clark proposes relay satellites in geosynchronous orbit
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