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Site Survey
25
compass, first align the arrow of the compass with magnetic north. With the compass
aligned
correctly,
draw an imaginary
line from the center of the compass
to the
azimuth of the satellites.
This is the general direction the dish must point. If possible,
pick a landmark
in the distance
that aligns with this bearing.
If not, repeat this
procedure
whenever
confirming
possible locations for the dish.
To determine
the elevation to the satellites, use some type of angle finder.
An angle
finder is a device that measures
angles.
A simple angle finder can be made with a
protractor and bubble level. To do this, place the protractor on the level. With the level
horizontal,
the angles indicated on the protractor are elevations.
There are also special
angle finding devices.
These devices are available at most hardware
stores.
Figure
18 is an example of a typical angle finder. To use this angle finder, place it on a level
or straight edge.
Then lift the front of the straight edge until the correct angle (or
elevation)
is indicated.
By using both the azimuth and elevation methods discussed previously,
it is possible
to view the line-of-sight
path to the satellites.
To do this, align a straight edge (used
in the elevation procedure)
with azimuth bearing.
Then, using an angle finder, lift the
40
°
PROTRACTOR METHOD
ANGLE FINDER METHOD
Figure 18, Measuring
Elevation
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