MDP-621/641/640 Chapter 4
Operation manual Installation
0093161022-06 4-5
4.4.2.1 Shifting from the obstacle
(1) Shifting from keel line
By shifting the scanner position from the keel line to the starboard side of the boat, it is possible to
move shadow zones to the port side. This makes it possible to keep a clear view to the bow.
The distance to be shifted can be calculated using the following equation:
Ls=0.4R+D/2 [m] (when R<15m)
Ls=0.025R+D/2 [m] (when R>=15m)
Where Ls = distance to be shifted from keel line
D = diameter of obstacle on keel line
R = distance from scanner to obstacle。
Ls=0.4R+D/2 [m] (when R<15m)
Ls=0.025R+D/2 [m] (when R>=15m)
Where Ls = distance to be shifted from keel line
D = diameter of obstacle on keel line
R = distance from scanner to obstacle
Obstacle
D
Ls
R
Scanner Unit
Keel line
Figure 4. 4 Shifting from keel line
(2) Obtaining sufficient dip angle
Raise the scanner position so that there is a sufficient dip angle θ available between the line of
sight from the scanner to the obstacle and the horizontal line. By raising the dip angle above 5°,
it is possible to prevent mid- and long-distance shadow zones. The radar cannot detect objects
below the line of sight.
Antenna
Obstacle
θ
Horizontal line
Line of sight
Figure 4. 5 Obtaining sufficient dip angle
To Next Page
Loading...
