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Satellite Antenna Alignment 2.87

The program "Satellite Antenna Alignment" is used to calculate the

angles necessary for installing satellite dishes. The main difference

from similar software is the possibility to calculate the position for

all satellites at once. Thus, you get a clear picture about what

satellites can be physically visible from the location where the dish

will be installed. It should be kept in mind that the program makes a

purely theoretical calculation according to formulas and in real

circumstances a lot of additional factors should be taken into account

when a satellite dish is installed. These factors include various

obstacles (buildings, trees), the landscape, the altitude, transponder

orientation, polarization, etc. Nevertheless, this program will allow

you to evaluate the position quite precisely. The calculation can be

saved to a text file, copied to the Windows clipboard or printed out

at once. It is possible to save the list of locations for which the

calculation is done. Later on, you will not have to enter the

coordinates of these locations again. Just select them from the table.

The high latitude is specified with the "N" char, the low latitude

is specified with the the "S" char. Similarly, the eastern longitude

is with the "E" char, while the western longitude is with the "W"

char. After all the coordinates are entered, you will see the

calculation for all satellites at once in the table to the left. Their

azimuth and elevation are calculated. Azimuth is the direction to the

satellite in degrees from the clockwise direction to the north.

Elevation is an angle (measured in degrees) between the direction of

the signal from the satellite and a tangential plane to the Earth

surface in the location. If the elevation is negative, the satellite

is below the horizon and it is impossible to receive signals from it

in principle. Thus, the satellites whose elevation is a positive value

are theoretically visible from your location. If you know the azimuth,

you can quickly find the direction to the satellite and see what

obstacles (neighboring houses, trees) there are in the way of the

signal from the satellite to your dish.

As it was mentioned above, the program uses absolute values and

calculates everything according to formulas. Thus, the calculated

azimuth is an angle from the true north and not from what your compass

may show because a compass is a really unstable thing, especially in a

city. It is better to orient it by the sun )

Additionally, the program has a mechanism for calculating the

azimuth of the sun and you can do everything without a compass now!

The azimuth is calculated for the location the coordinates of which

you specified for calculating the azimuths of satellites. You can

specify the date (the current date is taken by default) and calculate

how the sun moves with a one minute discontinuity. The calculation

results are displayed in the table to the left. Both the azimuth and

the elevation are calculated for the sun for the current moment of

time. Thus, you can install the satellite dish without a compass at

all. First, find the azimuth of the satellite you need. Then calculate

the azimuth of the sun for the day on which you are going to install

the dish. Find the azimuth of the sun that is most close to the

azimuth to the satellite and you will see the time (and date) when the

sun will be in the same direction where the satellite is. Turn the

dish to the sun at the specified moment of time, the azimuth of the

sun coincides with the azimuth of the satellite at this moment. Or

just note this direction and install the dish later. Remember to

specify your time zone for calculation (Moscow: +3 GMT). The program

also calculates the azimuths of the sunrise and sunset, as well as the

time and elevation when the sun is exactly in the south.

The program draws a simple diagram representing the four directions.

The yellow sector is daytime, its eastern part is sunrise and its

western part is sunset. The same diagram can be used to schematically

represent the direction to the satellite you need. Select the

satellite from the drop-down list and the red line will show the

direction to it (azimuth). If the elevation is negative, no red line

is drawn (the satellite is not visible).

Offset satellite dishes are widely spread now. When such a dish is

completely vertical, it already has some elevation (~20-25 degrees).

You can enter the size of your offset dish (height and width) and the

program will calculate the exact elevation for this dish. The

calculation is done only for dishes whose height is greater than

width. Enter the size of the dish in millimeters. Here you will see

the elevation to the selected satellite and the angle you should

actually install you dish at (in degrees from the Earth surface).