RAT 31 Family

Fixed and Deployable Air Defence Radar

Long Range band Radar

Currently the most modern and appreciated

Long Range radar system within NATO Countries.

RAT 31 Radar family

RAT-31- Main Characteristics

SOLUTION

Multiple simultaneous pencil beam antenna

Monopulse corporate feed antenna

system, pulse compression

Corporate feed squintless phase scan

antenna

Adaptive clutter processing compatible

with frequency agility

NATO REQUIREMENT

Volumetric coverage at a suitable data rate

High accuracy on the tridimensional

coordinates

Full frequency agility

Visibility in presence of various types of

clutter

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Multiple Independent Beam Concept

Each beam is independently controlled

Each beam has a full scanning capability

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SOLUTION

Frequency agility, coded waveform,

automatic frequency selection, very low

antenna sidelobes, SLB channel

Low peak power

CFAR thresholding and post processing

filtering

Distributed full solid state transmitter,

Graceful Degradation

Capability to operate in a heavy ECM

environment

Reduced ARM vulnerability

False alarm control

High reliability

RAT-31- Main Characteristics

NATO REQUIREMENT

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Capabilities ECCM

7

Corporate feed antenna Coded waveform

Narrow pencil beams Adaptive MTI notch

Ultra low sidelobes Random frequency agility

Low peak power Automatic frequency selector

Wide band frequency agility PRF stagger

Jamming strobe detection Double frequency conversion

High dynamic range Azimuth correlation

High range resolution Side lobe blanking channel

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SOLUTION

Sophisticated BITE

ISO Standard antenna group and

shelterized units

Remote control

On-line fault indication

Transportability - Mobility

Minimally manned

RAT-31- Main Characteristics

NATO REQUIREMENT

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MULTIPLE AND INDEPENDENT

SIMULTANEOUS PENCIL BEAMS

RAT-31S

3 beams,

3 channels

RAT-31SL

3 beams,

5 channels

RAT-31DL

4 beams,

4 channels

RAT-31DL/M

4 beams,

4 channels

RAT-31 3D Radar Family

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Independent

and identical

Receiver channels

Common System Architectures

Multiple

simultaneous

independent pencil

beams

Ultra low antenna

sidelobes

Modular

construction Graceful

degradation

Independent

SLB antenna

Multiwaveform

coded transmitted

signals

Extensive ECCM

capability

Reconfigurability

of the elevation

scan profile

© Copyright Selex ES. All rights reserved

European NATO ACCS

Selex ES is a premier provider in the European NATO ACCS system

Selex ES was awarded with the ACCS LOC 1 core development as a first level partner

ACCS LOC 1 site replication Program

Selex ES has been awarded with the site replication of the ACCS in Hungary and Norway

ACCS LOC 1 site adaptation

AWCIES data converter. Selex ES has been awarded with the sensor exchange data conversion for

several radars

ACCS TMD 1 Program

Selex ES has been awarded in the ACCS TMD 1 core development as a first level partner

ACCS COMMS SYSTEM

Selex ES has been awarded to rationalise and upgrade NATO’s satellite communication (satcom)

systems and associated infrastructures in Belgium, Italy, Greece and Turkey.

Selex ES has been awarded for the supply and the installation of communications systems in a Link

16 network within 14 NATO countries.

ACCS INTEGRATION

SELEX ES has received a contract for the integration of about 230 Sensors on new implemented Air

Command and Control (ACCS) Sites, hosted by eleven NATO Nations.

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RAT31 SL

Transportable Air Defence Radar

S-band Long Range Radar

RAT31 SL: Overview RAT31 SL

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RAT31 SL: Overview

S Band

Transportable

Instrumental coverage:

– Range 470 Km

– Elevation 0˚÷20˚

– Ceiling 30.5 km

RAT31-SL is a 3D LONG RANGE S-Band Early Warning Radar with a

phased array antenna which counters threats in every kind of ECM (Electronic

Counter Measures) and severe clutter environments.

Threats:

– Aircraft, Helicopters, UAV

– Missiles (including ARM)

– Jammer, Chaff

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S-Band, 3D - Multiple Pencil Beams - Phased Array

Surveillance volume covered by electronic scanning in elevation and 6 RPM mechanical rotation in azimuth

• Instrumented range: 470 km

• Elevation: up to 20°

• Height: 30.5 km

• Peak power: 150KW

Three independent and simultaneous pencil beams:

• three beams for detection, operating at different frequencies (84) dynamically selectable/managed depending on clutter/jamming environments

Simultaneous beams provide a longer Time-On-Target for a better target detection, good azimuth accuracy and optimum clutter rejection.

Narrow pencil beams and low antenna sidelobes

RAT31 SL Main Technical Characteristics

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Performance

ACCURACY

AZIMUTH: 0.25°

RANGE : 50 m

HEIGHT: BETTER THAN 600 m

RESOLUTION

Azimuth: 1.5°

Range: 60 m

Height: 1.3°

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RAT31 SL: Overview

Primary

radar

IFF

Planar

array

unit

Tilting

+/- 2° (nominal 7°)

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Cooling unit

Transmitter

shelter

Equipment shelter

System composition

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System composition

Functional

keyboard

Multifunctional

keyboard

Display

Mass Raid

display

ECM spectrum

display

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System composition

SIGNAL PROCESSOR RECEIVER

• Double conversion receiver

• Monopulse Σ e Δ channels with automatic phase

amplitude matching

• Separate/Simultaneous processing for MTI and Long

Range (5 double monopulse receivers)

• Triple canceller MTI: (Triple Fixed and Triple

Adaptive)

• Adaptive CFAR processing

• Post detection filtering

• Microprocessor controlled extraction/interface

© Copyright Selex ES. All rights reserved