Communication satellites in Earth orbit as a means of artificial earth satellite radio communication relay stations. Communications satellite in geostationary orbit in general use, this track is located 35,786 kilometers above the Earth at the equator. Space communications satellite is part of a satellite communication system.
A geostationary orbit communications satellites can cover about 40 percent of Earth's surface, so that any ground, sea and air communications station coverage area can simultaneously communicate with each other. In three geostationary communications satellites equally spaced above the equator can achieve global communications except the poles in some areas. Communications satellite is the world's first application, one of the most widely used satellites, in many countries the United States, the former Soviet Union, Russia and China have launched a communications satellite. The following describes the knowledge of communication satellites.
Before communications satellites appeared on Earth between two distant places to communicate in two ways; one is to use the cable, and the other is to use ground radio equipment. The late 1950s after Sputnik into space, people soon think, can be used in long-distance communications satellites. In August 1960 the United States launched its first such satellite. The satellite is 30 meters in diameter, called "echo on the 1st."
