1. INSTALLATION
1-4
1.1.2
Mounting considerations for three antennas
1) Install antenna unit GPS1 where it meets the requirements for single
antenna.
2) Install antenna unit GPS2 where it meets the following conditions:
•
The mounting location shall meet the requirements for single antenna.
•
GPS2 shall be closer to the bow than GPS1.
•
The distance between GPS1 and GPS2 shall be more than 50 cm and within
the 5 m.
•
The distance between GPS1 and GPS2 shall not change by more than 1 cm.
•
There shall be no interfering objects between GPS1 and GPS2.
•
If the GPS1 and GPS2 cannot be installed perpendicular to one another, the
angle between the two shall be ±30°. The amount of offset in the bow direction
shall be manually input into the equipment as heading offset.
•
The angle between GPS1 and GPS2 shall not exceed ±30°.
Abeam view
GPS1
GPS2
Within
±
30
°
Horizontal
More than 50 cm
within 5 m
GPS1
BOW
No interfering
object in
this area
GPS2
More than 50 cm
and within 5 m
Closer to bow than GPS1
Overhead view
Both antenna aligned with bow.
Further, alignment error should
be within
±
30
°
. Correct error
with offset.
Conditions for mounting antenna unit GPS2
