Satellite television - Wikipedia
https://en.wikipedia.org/wiki/Satellite_television
OverviewTechnologyUsesHistoryLegalSee alsoExternal linksThe satellites used for broadcasting television are usually in a geostationary orbit 36,000 km (22,000 mi) above the earth's equator. The advantage of this orbit is that the satellite's orbital period equals the rotation rate of the Earth, so the satellite appears at a fixed position in the sky. Thus the satellite dish antenna which receives the signal can be aimed permanently at the location of the sat…
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