Different Kinds Of Satellite Communication
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Satellite communication is used for so many aspects of our life that we probably don't even realize it. There are three types of orbits for satellites, geosynchronous orbits, Molniya orbits or low polar Earth orbits. The first satellite communication was in 1958.
The first active direct relay satellite communication was owned by AT&T and called Telstar. NASA launched Telstar in 1962. It was placed into an elliptical orbit that completes itself once every 2 hours 37 minutes.
The first geostationary satellite communication was a Canadian satellite that was launched in 1972. It was put into a geostationary orbit. This satellite was called Arik 1. In the next several
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year, more geostationary satellites were put into orbit.
Western Union launched Westar 1 in 1974 and in 1975 Satcom was launched by RCA Americom. The Satcom satellite communication was used to launch various cable TV channels, like WTBS and the Weather channel.
Boeing Satellite Systems, formerly Hughes Space and Communications, had built almost forty percent of the satellite communication systems built by the year 2000. One of their competitors was Lockheed Martin and another was Alcatel Space.
A less expensive alternative to a geostationary satellite communication is a low Earth orbiting satellite. A low Earth orbit is typically circular and about 150km above the Earth's surface. It usually takes them about 90minutes to revolve around the Earth.
Amateur radio operators are a group that take advantage of a satellite communication system called OSCAR. The OSCAR satellites have been designed to carry amateur radio traffic.
Here are some more communications articles...
