User's Manual

Table Of Contents
ED 3100 G 110 / 02 (2011-10)
Operating Instructions
A-1 General Information
A RADAR.fm / 10.11.11
A-13
NACOS Platinum
Simultaneous operation of Rain and Sea
Enhance combines an adaptive STC, an additional correlative filter and a so-called „target enhancement“
in four selectable steps. See also the table on page A-14.
Definitions:
Adaptive STC is a second STC that is derived from the medium value of the echoes of the last sweeps.
It is added to the manual STC and is able to suppress clutter.
The correlative filter works in scan to scan mode or over several scans respectively with its parameters
relative to the selected range. In large ranges, the correlation filter will need several scans until an effect
to the picture is visible, in smaller ranges the effect of the filter is faster. It is also able to suppress noise.
Target enhancement is used to display even very small or weak targets. For example, if an echo is
this small that it only lights up one pixel of the screen, it could be overseen or regarded as noise or
clutter. Target enhancement makes it a little bigger, so that is is better to discover among the more
dynamic clutter or noise. With this enhanced target, the correlation filter can work much more precisely.
In order to get information of when to use which of the four levels of the Enhance function, please
refer to the user manual. See chapter 5.2.4 on page A-43.
In the case that anticlutter sea value is set too large, weak targets can be lost, especially
at close range. If the sea is very rough, it can be expected that radar targets which only
produce weak reflections will remain undetected, even if the setting is correct.
In case that Rain and Sea are operated simultaneously, especially in very rough weather
conditions, the detection of radar targets may fail even if all settings are correct, because
the sum of clutter (reflections of sea and rain) is as high as or even higher than the reflec-
tion of targets.
When the Enhance function is running, the scan-to-scan correlation might have the result
that small, fast-moving targets or Racon codes are displayed with reduced intensity or
might be suppressed.