Satellite Communication

SATELLITE COMMUNICATION

In telecommunications, the use of artificial satellites to provide communication links between            various points on Earth. Satellite communications play a vital role in the global tele communications system. Approximately 2,000 artificial satellites orbiting Earth relaynanalog and digital signals carrying voice, video, and data to and from one or many locations worldwide.

Satellite communication has two main components: the ground segment,which consists of fixed          or mobile transmission, reception, and ancillary equipment, and the space segment, which primarily is the satellite itself. A typical satellite link involves the transmission or uplinking of a signal from an Earth station to a satellite. The satellite then receives and amplifies  the signal and retransmitte back to Earth,where it is received and re-amplified by Earth stations and terminals. Satellite receivers on the ground include direct-to-home (DTH) satellite equipment,mobile reception equipment in aircraft, satellite telephones, and hand held devices.  

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