communications satellite


communications satellite
an artificial earth satellite that facilitates communications, as radio, television, and telephone transmissions, by means of the reflection or the amplification and retransmission of signals between stations on earth or in space.
[1960-65]

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Earth-orbiting system capable of receiving a signal (e.g., data, voice, TV) and relaying it back to the ground.

Communications satellites have been a significant part of domestic and global communications since the 1970s. Typically they move in geosynchronous orbits about 22,300 mi (35,900 km) above the earth and operate at frequencies near 4 gigahertz (GHz) for downlinking and 6 GHz for uplinking.

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Universalium. 2010.