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-11
NACOS Platinum
1.4 Basics / Evaluation of the RADAR Video
1.4.1 Basics of the Evaluation of RADAR Video in Platinum Series
Generally, the echo data received by the transceiver can be amplified, attenuated or filtered in order to
enhance the display of desired data like targets. The main intention of the signal processing is the clear
and unmistakeable display of radar targets and the suppression of unwanted echoes like sea clutter,
rain clutter or interferences.
Amplification, attenuation or filtering is done in several ways, with continuosly or digitally working filters.
(Some can be set from 0% to 100%, others can only be switched on or off).
Further on, echo data with the same azimuth delivered from one or more radar pulses („sweep-to-sweep-
data“) can be processed or data from one or more antenna turnarounds („scan-to-scan-data“) can be
evaluated.
The amplitudes of echoes can be evaluated in order to determine whether the echoes are targets or
noise, or the correlation of sweep-to-sweep or scan-to-scan data can be used to enhance the radar
picture:
Table A / 4 Scheme of RADAR Video Evaluation
Amplitudes are influenced for example by the Gain and Sea settings, correlation is done amongst others
by the Enhance functions.
In the following, the different filters, their basic techniques and advantages or limitations are described
in the sequence they appear on the screen.
Raw RADAR Data
Processing
Amplification
Attenuation
Filtered RADAR Data
Amplitude Treatment
Correlative Treatment
Sweep-to-sweep
Scan-to-scan