INTELSAT 4 F-5 was a communcations satellite with a cylindrical diameter of 238 cm, 281 cm solar drum height, and 528 cm overall height. Electic power was supplied by solar cells mounted on the solar drum face. 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.
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