Promax HD Ranger + Manual do Utilizador descarregar pdf (Página 122)

18 March 2015

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Figure A2.5. An example of LNB(Low Noise Block-converter)

A2.1.3

Coarse dish alignment

We can use different techniques to find out where in the sky the satellite we want

is located. They can be anything from a pure guessing game to a sophisticated

procedure.

The satellites we are interested in are all positioned in a geostationary orbit

above the earth's equator. Each of them has a fix given position in that orbit,

something like a street number, that we can know from various sources. Orbital

position is an important datum so it is commonly part of the name as well.

Websites like http://www.lyngsat.com/ or http://www.satcodx.com/ offer plenty

of useful information about the satellites we are talking about.

For example ASTRA 19E refers to ASTRA satellite which is positioned at 19

degrees East in the orbit.

Knowing where we are in terms of latitude and longitude is also easy. We can

read that information from a map or even from our car's navigation system if we

have one.

Figure A2.6.

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Promax HD Ranger + Manual do Utilizador Página 122