How a Satellite Dish Works

Written by Gary Davis


Continued from page 1

The curved dish focuses incoming radio waves ontorepparttar feed horn. The feed horn then passesrepparttar 109909 signal onto repparttar 109910 receiving equipment. Ideally, there will be no obstructions, such as trees to interfere withrepparttar 109911 signal fromrepparttar 109912 satellite torepparttar 109913 satellite dish. With no obstructions you receive a much clearer signal.

Some systems are set up to receive signals from more than one satellite. A new dish design uses two or more horns to pick up different satellite signals. Asrepparttar 109914 beams from different satellites hitrepparttar 109915 curved dish, they reflect at different angles so that one beam hits one ofrepparttar 109916 horns and another beam hits a different horn.

The central element inrepparttar 109917 feed horn isrepparttar 109918 LNB (low noise blockdown converter) The LNB amplifiesrepparttar 109919 radio signal bouncing offrepparttar 109920 dish and filters outrepparttar 109921 noise (radio signals not carrying programming). The LNB passesrepparttar 109922 amplified, filtered signal torepparttar 109923 satellite receiver insiderepparttar 109924 viewer's house.

A cable is run fromrepparttar 109925 satellite dish intorepparttar 109926 house and then connects torepparttar 109927 satellite TV receiver (black box) thus completingrepparttar 109928 connection.



Gary Davis is owner of Dish Network Satellite TV, has several years experience in the Satellite TV Industry and has written several articles on satellite TV.


Artificial Satellite Types

Written by Gary Davis


Continued from page 1
Navigation Satellites

These satellites were of enormous help to transportation companies, especially transportation over water and throughrepparttar air. The US GPS satellites are in Low Earth Orbit (LEO) and can determine position with a precision of 1 cm (0.4 inch). However, that very precise positioning is available for military purposes only. For commercial userepparttar 109908 precision is less accurate.

Navigation satellites are also used for distance measurements for instance between buildings.

Weather Satellites

Observingrepparttar 109909 earth isrepparttar 109910 task for weather satellites, and then especially what happens inrepparttar 109911 atmosphere. Different kinds of cameras, like infrared and normal cameras are used to observe eitherrepparttar 109912 same part ofrepparttar 109913 earth, from a geostationary orbit, or more closely from polar orbits to get more detailed pictures. These low orbit weather satellites focus more onrepparttar 109914 study ofrepparttar 109915 atmosphere than onrepparttar 109916 current weather it self.

Military Satellites

Very similar to weather satellites, military satellites are also used for observingrepparttar 109917 earth. Generally with higher resolution cameras and instead of normal communications equipment, they use encryption as well. Sometimes these types of satellites have very different types of orbits. For instance a very elliptical orbit which bringsrepparttar 109918 satellite as far away fromrepparttar 109919 earth asrepparttar 109920 moon and as close torepparttar 109921 earth that it shortly entersrepparttar 109922 atmosphere, to get as close as possible torepparttar 109923 earth surface without falling back to earth.

Probably many more tactics are used, but for obvious reasons, these are unknown.

Scientific Satellites

Observingrepparttar 109924 earth for scientific purposes is also very good possible with satellites. Making maps with low polar orbits satellites for instance, but also measuringrepparttar 109925 exact shape ofrepparttar 109926 earth, geological research, etc can all benefit greatly from scientific satellites.

But scientific satellites are not just used for observingrepparttar 109927 earth. The research of space benefits also from scientific satellites. For instancerepparttar 109928 Hubble Satellite which actually is a huge telescope that orbitsrepparttar 109929 earth. Becauserepparttar 109930 Hubble telescope doesn’t have to “see” throughrepparttar 109931 atmosphere it can produce much clearer and detailed images than earth based telescopes.



Gary Davis is owner of Dish Network Satellite TV, has several years experience in the Satellite TV Industry and has written several articles on satellite TV.


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