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NavCom SF-2050 Rev.E User Manual

Page 27

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SF-2050 User Guide - Rev. E

the environmental seal of the antenna, and lead to
internal damage.

There should be an unobstructed view of the sky above
a 7-degree

elevation mask

for optimum

GPS

satellite

visibility. Any obstructions above the horizon should be
mapped using a compass and clinometer and used in
satellite prediction software with a recent satellite

almanac

to assess the impact on satellite visibility at that

location. Potential sources of interference should also be
avoided where possible. Examples of interference
sources include overhead power lines, radio transmitters
and nearby electrical equipment.

To take full advantage of the

StarFire

™ service, there

needs to be a clear line of sight between the antenna
and the local Inmarsat satellite. Inmarsat satellites are
geo-synchronized 35,768kms above the Equator
currently at Longitudes 098°West, 025°East, and
109°East.

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