System described consists of two transponders, one handling traffic from United States to Europe, and other traffic from Europe to United States; composite voice channel or TV signals frequency modulate 6 Gc carriers transmitted from ground stations, and at spacecraft repeaters 6 Gc signals are converted to 4 Gc and retransmitted; each transponder has associated with it beacon signal which is continually phase modulated by 14.5 kc subcarrier, which in turn is frequency modulated by 12 channel commutated telemetry signal.
Early bird communications system
Am Astronautical Soc -- Science Technology Ser
Space Electronics Symposium on American Astronautical Society ; 1965 Satellites
1965
Conference paper
English
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