Section 7 True and False Echoes on Display 7-8
7.3.3 Coping with sea clutter and rain/snow clutter
When the weather is bad and the ocean is rough, the use of an S band radar is effective because the
radar is not influenced by sea clutter so much and attenuation due to rain drops is small. When an X
band radar is used, reducing the pulse length will reduce the influence by undesired signal, and also
the undesired signal rejection function effectively works; therefore, the use of short pulse is effective
when the weather is bad. The effect of undesired signal control can be enhanced further by setting the
various items on the [RADAR process] dialog box that is displayed by clicking the RADAR signal
processing setting button.
By using the observation scene selection function that is described above, a suitable setting value can
be retrieved according to various conditions such as weather (in the case of storm it is recommended
to set a value for Storm or Rain).
For the description of the observation scene button, refer to "5.3.7 Adjusting to optimal images
(Selection of observation scenes)". While these settings are effective, targets, particularly, those that
move at high speed may not be recognized visually.
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