How a Satellite Dish WorksWritten by Gary Davis
| How a Satellite Dish Works By Gary DavisDish-Network-Satellite-TV.ws Webmasters: You may reprint this article in its entirety, providing you leave Byline and About Author sections intact, including links to Dish Network Satellite TV. A satellite dish is an antenna designed to focus on a specific broadcast source. The standard dish consists of a parabolic (bowl-shaped) surface and a central feed horn. A controller sends it through horn, and dish focuses signal into a relatively narrow beam. A narrow beam is generated as dish reflects energy from feed horn. The satellite dish on receiving end can only receive information; it cannot transmit information. The receiving dish works in exact opposite way of transmitter. When a beam hits curved dish, parabola shape reflects radio signal inward onto a particular point, just like a concave mirror focuses light onto a particular point.
| | Artificial Satellite TypesWritten by Gary Davis
Artificial Satellite Types By Gary DavisDish-Network-Satellite-TV.ws Webmasters: You may reprint this article in its entirety, providing you leave Byline and About Author sections intact, including links to Dish Network Satellite TV. A celestial body orbiting another celestial body of larger size is a satellite. An artificial satellite is a manufactured object or vehicle intended to orbit earth, moon, or another celestial body. Since October 4th, 1957 humanity is capable of putting artificial satellites in orbit around earth. The Russians were first with Sputnik; a small satellite that orbited earth for a couple of months and transmitted beeps for 21 days. The USA launched its first satellite on January 31st, 1958. This satellite was named Explorer 1, and through data transmitted back to earth by Explorer 1, scientists discovered van Allen radiation belts, zones in space around earth, and planets Jupiter and Saturn, containing high-energy protons and electrons. 50 years ago artificial satellites did not exist. Since Sputnik more than 4800 satellites have been launched by governments and private companies around world. Satellites are used for satellite TV of course, but there are many more purposes for satellites. Types of Satellites The Moon is a satellite of earth; earth is a satellite of sun. The first is called a moon, second a planet. Man made (artificial) satellites orbit any celestial body and are always called a satellite, whether they orbit earth, moon, sun or any other celestial body. We use satellites for different purposes and all satellites can be placed in one of following categories: Communications Satellites Distribution of television and audio signals, and telephone connections via satellite are done by Communications Satellites. These types of communications typically need a satellite in geostationary orbit. In 1964 US Department of Defense launched first satellite that was placed in geostationary orbit. This satellite was named Syncom 3. Today geostationary satellites are used to provide voice, audio and video communications like satellite TV by Dish Network Satellite.
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