User's Manual

Synapsis Radar
with Nautoscan NX Pedestal
Operator Manual
4265.DOC020102
2-44
Edition July 2015
Operator controls
Task
Use the trackball to place the cursor on the SEA
slider then press the left trackball button.
Rotate the trackball to adjust the optimal SEA clutter
value.
2.3.1.5 Rain Rate
The function of the RAIN control is to enable the operator to suppress Radar
returns which are the result of Radar signals reflected from rain drops.
This effect is commonly known as rain clutter. As with sea clutter, the rain
clutter tends to mask small targets (or large targets if the rain is intense).
When heavy rain is falling in the vicinity of the operator’s ship (up to 6- 10 NM)
and the resulting rain clutter is obscuring nearby targets, then the rain rate
slider should be used. Advance the rain rate control slightly and observe the
results (wait 3 scans).
The ultimate goal is to reduce the nearby rain clutter until it is a very light
speckle at the dim level. This setting will reduce the rain returns and will have
little effect on strong constant target video returns. Weaker targets (usually
appear where rain returns are less intense) may be suppressed along with the
rain.
Most of these weaker targets can be restored by making a FTC adjustment
(chapter 2.3.1.7).
Operator controls
Task
Use the trackball to place the cursor on the RAIN
slider then press the left trackball button.
Rotate the trackball to adjust the optimal RAIN
clutter value