Satellite communications. Conceptual composite image of global communication by satellite, showing two hands pointing to a satellite that is beaming information to Earth. Three views of Earth showing different continents are receiving the signal. Communication satellites act as relay vehicles for radio signals. Most communication satellites are placed in geosynchronous orbit 35,700 kilometres above the equator. In this orbit the satellite 'hovers' above the same point of the Earth at all times. Communication satellites are used to relay telephone and fax messages, computer data and to broadcast television signals.
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