SATELLITE TV- A BIRTH OF A MORDERN ERA
In 1962, the initial satellite TV was telecasted in Europe and northern America through Telstra satellite. Early Bird being the first commercial satellite being launched in the year 1965.In U.S.A satellite T.V arrived in the year 1980.
During the 80's and 90's satellite TV's were considered very expensive costing somewhere around $2000 to$10,000 and was a luxury item during in that phase. Even the dishes were humongous with diameter as large as 10 to 12 feet and receivers and antenna rotators were bulky and complicated.
In 1994 the first DBS (Direct Broadcast Satellite) was put into orbit, beginning the era of mini dishes and microchips. A normal satellite works almost the original one does. Radio signal transmit programming is received through satellite that orbits the earth. This satellite is on the viewer's home and viewer gets 200 channels (approx) in his television. The three primary companies supplying satetelite connection in U.S are
A satellite is any object that orbits another object (which is known as its primary). All masses that are part of the solar system, including the Earth, are satellites either of the Sun, or satellites of those objects, such as the Moon. It is not always a simple matter to decide which is the 'satellite' in a pair of bodies. Because all objects exert gravity, the motion of the primary object is also affected by the satellite. If two objects are efficiently similar in mass, they are generally referred to as a binary system rather than a primary object and satellite. The general criterion for an object to be a satellite is that the center of mass of the two objects is inside the primary object.
Satellite TV service gets its TV signals from satellites in geosynchronous orbit. Because they stay in the same position relative to the earth's surface at all times, once a satellite antenna (usually, a dish of some kind) is properly aimed, it can be left as-is thereafter. Satellite signals are broadcast from a ground station to multiple satellites, which then broadcast those signals back to the earth across huge expanses of territory. Anybody with a satellite dish (the antenna), plus the proper signal processing gear (a set-top box of some kind, usually called a satellite receiver, is required for each TV set on which you want to watch the provider's programming) that can "see" a satellite can pick up the signal. A single antenna can feed multiple satellite receivers, but a physical cable is routed from the antenna to each receiver (inside the house, both cable and satellite TV require cables for each TV set).
Satellite providers control access to their networks by including special encryption and encoding in their signals, and tightly controlling the equipment that can read and play back those signals, to prevent unauthorized users from tuning in and obtaining free TV service.
There are generally two types of satellite
1) Natural – The natural satellites are moon and planets and are out of human control
2) Manmade – Man made (artificial) satellite orbit any celestial body are always called satellite
3) Communication satellite – Mainly used in telephones and television connection via satellite are some by communications satellite. They are generally called as geostationary satellite.
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