1. INSTALLATION
1-5
3) Install GPS3 where the following conditions are satisfied:
•
Install GPS3 where it meets the requirements for single antenna.
•
GPS3 shall be closer to the bow that GPS2 but not closer to the bow than
GPS1.
•
The distance between GPS1 and GPS3 shall be more than 50 cm and within
the 5 m.
•
The distance between GPS2 and GPS3 shall be more than 50 cm and within
the 5 m.
•
The distance between all three antennas shall not change by more than 1 cm.
•
The vertical length between baseline 1 (from GPS1 to GPS2) and baseline 2
(from GPS1 to GPS3) shall be more than 50 cm.
•
The vertical length between baseline 2 (from GPS1 to GPS3) and baseline 1
(from GPS1 to GPS2) shall be more than 50 cm.
•
The angle formed by GPS1, GPS2 and GPS3 shall be no more than 90°
•
The angle from the GPS1 to GPS3 shall not be more than ±30°.
GPS2
GPS1
GPS1
Horizontal
GPS3
GPS2
More than 50 cm
More than
50 cm
Baseline 1
GPS1
BOW
BOW
Baseline 2
Within
90
°
No interfering
object in this area
More than 50 cm
and within 5 m
GPS3
More than 50 cm
and within 5 m
Overhead view Overhead view
More than 50 cm
and within 5 m
Within
±
30
°
GPS3
Closer to bow than GPS1;
Closer to stern than GPS2
Abeam view
Conditions for mounting antenna unit GPS3
