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Distance measurement, Direct sunshine, 3 distance measurement – GeoDesy GD-3000 Series User Manual

Page 11: 4 direct sunshine

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3.3 Distance measurement


Because the units were designed, and calibrated for certain distance operations the
higher distance will decrease the availability. GeoDesy FSO pre-calibrates and pre-
tests every unit shipped to the customer. To ensure that the unit you are about to

buy fits to the needs, the first step
is to measure the distance. The
best way to measure it is by GPS
(Global

Positioning

System), these units
are accurate enough to
determine the distance
between two points.
For

more

details

please refer to the
GPS

manufacturer

handbook. Also there are several
other ways to measure the
distance. If you know the exact

address you can use mapping software like MapPoint or Auto route.

3.4 Direct sunshine


To prevent the sun
shining directly into the
receiver optics, first one
has to determine the
orientation of the link.
Try to avoid East-West
orientation wherever it is
possible. Examine both
sides of the link at
sunset and sunrise and
find a position where the
sun cannot get behind
any of the heads. Be aware that the path of the sun is changing throughout the year.