Beskrivning : The satellite had multiple access and simultaneous transmission capabilities with a capacity of 3000 circuits with transponder in the earth mode and 9000 circuits with transponder in the spot-beam coverage mode, or 12 TV channels or certain combination. There were 12 transponders, each with a 36-MHz bandwidth, two global transmit antennas, two global receive antennas, and two steerable spot-beam transmit antennas. The design life of the satellite was 7 years. All spacecraft exceeded their design lives and have been retired from active service, the last of which, Intelsat IV F-1 was retired in October 1987.
Kennedy Space Center post stamp and Intelsat IV D satellite.
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