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About: Communications satellite     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : dbo:ArtificialSatellite, within Data Space : dbpedia.org associated with source document(s)

Type: ThingArtificialSatellite New Facet based on Instances of this Class

A communications satellite is an artificial satellite that relays and amplifies radio telecommunication signals via a transponder; it creates a communication channel between a source transmitter and a receiver at different locations on Earth. Communications satellites are used for television, telephone, radio, internet, and military applications. As of 1 January 2021, there are 2,224 communications satellites in Earth orbit. Most communications satellites are in geostationary orbit 22,300 miles (35,900 km) above the equator, so that the satellite appears stationary at the same point in the sky; therefore the satellite dish antennas of ground stations can be aimed permanently at that spot and do not have to move to track the satellite.