NAVAL DIVISION
NADIR Radar
Radar Cross Section Measurement System
Composition
NADIR Radar is a flexible radar system for use in an
inshore environment designed to perform dynamic
measurements of full-scale ships to provide radar cross
section (RCS), high resolution range profiles (HRRP),
hourglass plots and inverse synthetic aperture radar (ISAR)
images. The system is customizable and expandable
and only requires a short time to acquire accurate
measurements, the acquisition time being limited only
by the speed and maneuverability of the ship itself. The
radar, tracking equipment and the cabin for its operators
and control and monitoring equipment is all designed for
outdoor use, is self-powered and is fully transportable.
NADIR Radar consists of three modules which are
transportable by a single truck and trailer:
•
•
•
The antenna subsystem is mounted on an equipment
trailer and includes an RX/TX radar antenna
assembly and an elevation over azimuth positioner.
The operating shelter houses the control equipment
and post processing computers.
The on-board subsystem, including a GPS radio link,
which is carried on the target.
An advanced tool to measure the radar cross section of ships at sea
www.idscorporation.com/naval
NADIR Radar
Operation and Performance
Technical Specifications
•
Measurement System Capabilities
•
•
•
•
Optimized for short range RCS dynamic
measurement of naval vessels. When being
measured, the ship can describe circular trajectories
or can perform 360° revolutions using its bow
thrusters. The ship is tracked by NADIR Radar using
its real-time GPS tracking capability.
Allows very fast operation and provides highly
accurate data (up to 1m range resolution).
Includes powerful post processing capabilities integrated
in a unique software tool and database capability.
Extremely fast waveform generation (Direct Digital
Synthesizer chirp), capable of providing millions of RCS
samples and range profiles for each ship revolution;
this performance gives the user great flexibility, i.e.
acquiring HRRP without any range ambiguity and with
no need to rely on pulse repetition frequency (PRF)
agility or using higher coherent and not coherent
integration rates (thus improving sensitivity).
Ease of deployment and operational readiness: no
need to bring platforms on site, non-invasive, no
need for civil engineering works and can be brought
to any measurement site. The NADIR Radar system
enables the user to start the measurement program
immediately after the system has been deployed at
the installation site. This minimizes service outages
and time delays, and reduces the installation and
operational manpower needs.
Operational Band
4-18 GHz
TX/RX Polarization HH, VV
Range Resolution
1m
Cross-range
Resolution
1 m (typical)
Ship Tracking
Provided by real-time GPS tracking
RF Performance
Waveform
LFM Chirp
Dynamic Range
≥45 dB for HRRP
≥55 dB for ISAR
NERCS (Noise
0 dBsm @ 15km (total RCS)
Equivalent RCS,
-20 dBsm (HRRP, 2D imaging)
or minimum
detectable RCS at
the target distance)
Pulse Operation
PRF
Up to 12.5 KHz
Pulse Width
0.8 µs – 400 µs
PRT
≥80 µs
A/D Sampling Rate 250 MSPS
RCS Samples
~8000 per second
Up to 5-7 million per ship turn
12_REV_1.9
Aut. SMD n° 41832
IDS Ingegneria Dei Sistemi S.p.A.
Via Enrica Calabresi 24, 56121 Pisa (PI) Italy
Tel. +39 050 31241 Fax +39 050 3124201
[email protected] - www.idscorporation.com/naval