Furuno WR2120 Installation Manual page 50

EL start angle: Current solar elevation angle of sun -15 deg.
[Note: Minimum elevation must be higher than 25 deg. If this elevation is lower, that means it
did not measure accurately)
EL end angle: Current solar elevation angle of the sun +15 deg.
(Refer to Figure 5.4. Solar_Elevation_Angle)
3) Make folders as follows when setup the Multiple parameter
output folder.
- Folder for Sector PPI:
"sppi_before" (Use current Azimuth offset value that set at
section 5.1 or section 5.2)
"sppi_after" (Azimuth offset value after adjusted at step 7)
- Folder for Sector RHI:
"srhi_before" (Use current Elevation level correction value)
"srhi_after" (Elevation level correction value after adjusted at step 7)
4) Click [Connect] in a drop-down menu of the [Radar operation]
first, then click [TX] to start observation after connected.
5) Click [Stop Motor] in a drop-down menu of the [Emergency
Stop] after observed around 20 data files into the output
folder.
6) Drag & Drop an acquisition output folder (sppi_before,
sppi_after, rhi_before, rhi_after) into [Antenna_position_
analysis.exe] to check the graph.
- Refer to section 5.3.4 for instructions.
- Solar radiation spectrum has difficulty to check when sun is
blocked by clouds or position of sun is poor during scan.
Before offset
adjustment
Using
current
offset value
(sppi_before)
7) Add the average values to the following setup value.
Go to step 2) to readjust a value if it does not pass the
acceptance criteria value.
Acceptance criteria value: ±0.5 deg.
A: Add the value of (Clockwise + Counterclockwise / 2) to the Azimuth offset to north value.
e.g. [Clockwise -0.15] plus [Counterclockwise 0.16] divided by 2 = 0.005
Add the average values of SPPI to the AZ offset to north:
Press [Alt] + [Ctrl] + click [setting] menu of RainMap,
[Setting] > [Advanced Setting] > [Zero position offset] >
[AZ offset to north]
B: Add the value of (Upward + Downward / 2) to the
e.g. [Upward 0.04] plus [Downward 0.39] divided by 2 = 0.215
Add the average values of SRHI to the Origin EL position
offset correction.
Press [Alt] + [Ctrl] + click [setting] menu of RainMap,
[Setting] > [Advanced Setting] > [Zero position offset] >
[Origin EL position offset correction]
After offset
adjustment
Green line
comes
between blue
and red lines
Only to
(sppi_after)
44
Figure 5.11:
Multiple parameter output
Figure 5.12
Figure 5.13
Figure 5.14: AZ offset to north
Origin EL position offset
Figure 5.15
:
offset correction
: sppi
: srhi
correction.
Origin EL position