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Satellite television (Sat
TV) is
television delivered by way of communications satellites, as compared to
conventional terrestrial television and cable television. In many areas
of the world, satellite television services supplement older terrestrial
signals, providing a wider range of channels and services, including
subscription-only services.
Satellite television, like other communications relayed by satellite,
starts with a transmitting antenna located at an uplink facility. Uplink
satellite dishes are very large, as much as 9 to 12 meters (30 to 40
feet) in diameter. The increased diameter results in more accurate
aiming and increased signal strength at the satellite.
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