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[b]SATELLITE COMMUNICATION[/b]

P.KRISHNAVENI
B.GAYATRI

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EVOLUTION

The idea of communication through a satellite,in particularwith synchronous satellite was conceived by Arthur C.Clarke,a famous Britsh science fiction writer in 1945.
Clarke had already pointed out that a satellite in a circular equtorial orbit with a radius of about 42,242km would have an angular velocity that matched the earth’s.
Thus it would always remain above the same spot on ground and it could receive and relay signals from most of the hemisphere.
Clarke has also stated that electrical power for the sattelite would be obtained by the conversion of the sun’s radiation by means of solarcells.