Beam DriveDOCKExtreme Installation & User Manual page 55

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Iridium is committed to providing subscribers around the world with con-
sistent, reliable, quality voice and data access all day, every day. The Iridium
satellite system is monitored for call performance from numerous locations
24 hours a day, 7 days a week in order to achieve this.
There are conditions that can compromise the quality of the service you
may receive. These include:
• Obstructions
• Cabling
• RF Interference
Obstructions
The antenna must be able to "see" the entire sky from approximately 8
degrees above the horizon. Nearby tall buildings or similar structures,
heavily leafed trees and mountains can all degrade performance as
they block the signal between the antenna and the satellites. Having a
completely open view of the sky plays a very important role in maximising
performance, as the Iridium satellites cross the sky from North horizon to
South horizon during a connected call.
All surrounding obstructions must be lower than the top of a st extended
at arms length and the bottom of the st placed on the horizon. Iridium
performance is immune from natural environments such as clouds, fog,
rain, snow, wind and smoke.
8°
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