The Line Array - RADAC WaveGuide 5 Direction User Manual

The Line Array

In some cases it can be decided to mount the three radars in
line with each other, for example when mounting them to the
railing of an offshore platform. This installation is called a line
array. In this case the central radar needs to be tilted to obtain
a triangular reflection footprint, which is illustrated in Fig. 2.6.
In a line array, the tilting definitions (Fig. 2.3) require that
radar A is positioned between radar B and C. This allows tilting
radar A away from the line B-C and by doing so forming a
triangle with the radar foot prints on the water surface. The
direction of the radar tilt angle is defined with the right hand
rule as shown in Fig. 2.6. It is advised to select non-tilted radar
B or C as the "heave source", which is the source of data for calculating the non-directional
wave parameters.
A mounting plate can be used to fix each radar to two horizontal beams at the desired
location (an example sketch of such a plate is given in Fig. 2.8). Upon request, Radac can
supply such a mounting plate (product no. WG5-MP-EX). During installation it is advised
to install the mounting plate first and secondly install the radar.
Upon request, Radac can supply an optional frame (product no. WG-MH-SS) that allows
for mounting a radar at angles 0, 5, 10, 15 and 20 [deg] with the horizontal plane shown in
Fig. 2.7). Each frame includes a mounting plate.
Figure 2.7: Optional frame that allows mount-
ing of the radar at different angles (product no.
WG-MH-SS).
Radar sensor
Tilt angle [deg]
Min. Signal [dB]
Table 1.2: Advised sensor settings specific to a line array.
Figure 2.8: Optional mounting plate (product
no. WG5-MP-EX) for a WaveGuide 5 Compact
Radar.
A B C
15 0 0
25 25 25
15
C A
Figure 2.6: Top view of the three
radars labeled A, B and C.
57 [mm]
6-
[mm]
35 [mm]
15
35 [mm]
[mm]
270 [mm]
320 [mm]
+
B
6 [mm]