Nobeltec IR2-HD2, Руководство по установке

Страница: 58 / 82

InSight Radar (IR2) (IR2-HD2 and Higher Models)
50
The PC Connection Installer’s Guide
Setting the Auto Sea Clutter Preset
The Auto Sea function adjusts the image to dynamically compensate for changing
sea state due to wind or swells. The radar evaluates the type of echoes returned and
more sea clutter control is applied from the center going out on the image. One
benefit of the Auto Sea setting is that if the sea state increases due to wind, more sea
clutter control is applied on the leeward side of the image to counteract the wave
chop on that side of the vessel.
Auto Sea is a combination of two modes: Harbor Sea Clutter and Auto Sea Clutter
control. When the range of the radar is one mile or less, the program places the radar
in the harbor sea clutter mode; over one mile and the program switches the radar to
auto sea clutter mode.
Harbor sea clutter is applied in situation where auto sea clutter control does not
work well; in environments where strong echoes are returned from land or nearby
buildings. Unlike the auto sea clutter mode, this mode does not attempt to dynami-
cally adjust the sea clutter application, but rather applies a static sea clutter control
value based on the harbor sea clutter preset.
As with the Auto Gain setting, the Auto Sea clutter applies to all ranges. But due to
the nature of sea clutter application, it is applied based on the STC Curve profile set
below and generally has greater application closer to the vessel.
Follow these steps to adjust the Auto Sea clutter preset:
1. Set the radar range to 12NM.
2. Click the
Auto Sea
toolbar button.
3. Select the Adjust Radar Presets function by right-clicking on the radar image window or
from the Radar menu.
4. Set the auto sea preset to 10. Set the STC Curve preset to 4. Click OK .
5. Manually adjust the gain until you get secondary echoes throughout the image (make
sure your radar color selection allows you discern between strong and weak echoes).
6. Go into the Adjust Radar Presets function again.
7. Adjust the auto sea preset value up until most of the weak echoes for an 8NM radius are
eliminated. Click OK .
8. Adjust the radar range to 1.5NM and verify that strong echoes from nearby vessels or
land are not eliminated. If land or vessel echoes are small or have been eliminated,
follow the above steps to decrease the sea clutter preset.