EWS Suite on Rudra

Posted on Posted in Aerospace News, Defence Analysis, Indian Defence News

HAL Rudra features a robust Electronic Warfare Suite manufactured by Saab. It is equipped with IDAS-3 integrated defensive aids suite. It includes LWS-310 laser warning sensor, MAW-300 missile-approach warning sensor and BOP-L series advanced lightweight countermeasures dispensing system and RWS-300 Radar. Saab’s IDAS is an EW system designed to provide self-defense in sophisticated, diverse and dense threat environments. The modular system architecture allows IDAS to be configured for any combination of the three sensor-system types. IDAS systems offer cost-effective defensive aids, providing exceptional performance in a lightweight form for a wide variety of aircraft.


High sensitivity with full capability to simultaneously handle pulsed and CW radars.

Internal wide-band IFM.

Digital video processor provides high-accuracy DF, pulse-on-pulse handling and intra-pulse measurements.

Near 100 % POI.

Frequency coverage 0.7–40 GHz (pulsed signals), 0.7–18 GHz (CW signals).

Spatial coverage 360° AZ over the full frequency range with four antennas. Full spherical coverage can be achieved with  six sensors.

Option: digital receiver enhancing sensitivity, emitter identification, simultaneous CW handling capability and DF performance.

Use of INS dramatically improves range measurements, minimizes symbol “duplication” or “splitting” under dynamic platform maneuvering and enables intercepted weapon-system localization.



Wavelength coverage of 0.5-1.7 µm.

Threat classification and direction-finding indication of laser range finders, designators, lasers used for missile guidance and dazzler lasers.

Identifies specific lasers if threat-library information is available.

High sensitivity to detect missile-guidance lasers.

High POI.

Low false-alarm rate.

Spatial coverage 360° AZ with four sensors including good sensor overlap.

Direction-finding to allow appropriate maneuvering to break operator’s line of sight and counter threats.

Provision for up to six (6) sensors for improved large platform coverage.

Laser-warning function (RWS-310)

Missile-approach warning function (MAW-300)

Countermeasures-dispensing function (BOP-L series)

IDAS-3 Physical and power consumption characteristics



Passive ultra-violet (UV) based sensors, which operates in the solar-blind UV spectrum.

Neural-net classifiers using both temporal and accurate spatial information as well as compensation of own platform movement, ensures low false-alarm rates.

Reaction time optimized by keeping missile time to impact constant, irrespective of range to ensure enhanced flare countermeasures effectiveness.

Inhibits warning against diverging missiles.

Direction accuracy suitable for cueing DIRCM and dispensing of countermeasures decoys in correct direction.

Spatial coverage of 110° conical per sensor limits unprotected “hole” below platform and allows good sensor overlap.

Spatial coverage of 360° AZ with 4 sensors. Full spherical coverage can be achieved with six sensors.

Provision to add up to eight sensors to ensure hemispherical or full spherical coverage.

Multi-threat capability allows tracking of multiple targets simultaneously.

Near 100 % probability of warning.

Compact, light-weight, low-power, no-cooling, skin-mounted sensors.


Numerous safety features inherent in design (functional and personal safety).

Modular and compact design.

User-programmable dispensing sequences.

Low weight.

Payload mix recognition, misfire detection and compensation.

Programmable back-up mode in the event of system degradation.

Easy installation and removal.


The radar-warning function features a compact, wide-band, high-sensitivity solution with high probability of intercept (POI). The addition of an optional digital receiver (DRx) transforms the radar-warning functionality into a full-fledged ESM system. The laser-warning functionality is achieved by using four (4) LWS-310 sensors and a processor card in the electronic-warfare controller (EWC). It features high sensitivity, excellent threat coverage and exceptional probability of intercept (POI) for both single and multi-pulse emissions. A unique feature of this system is that it not only classifies laser emissions, but can also identify laser emission through a user-programmable threat library.

A unique optical design being employed by MAWS incorporating filter technology with purpose-built image intensifier tubes and photon-counting focal-plane array processors, ensures high sensitivity equating to long detection range. Each sensor uses a dedicated digital signal processor making use of a distributed, hierarchical data-processing architecture to ensure optimal utilization of information in real time.

Digitization and pre-processing functions are performed at the detector using an advanced focal-plane processor. Each sensor’s data is transferred to a dedicated digital signal processor (MAW controller), resident in the EWC, which performs equalization, segmentation and feature extraction.

Each sensor processor can detect and process multiple potential targets, passing the spatial and temporal feature data to the processor card in the EWC. There, the spatial data is integrated with real-time INS information to compensate for platform movement, attitude and altitude. The MAW controller then executes neural-net pattern-recognition algorithms to ensure accurate operation with very low false-alarm rates.

The missile-approach warning system is in production for numerous platforms. It has been field tested and approved against various missiles including live missile firings under in-flight dynamic conditions.

The BOP-L dispensers are controlled via a fully integrated chaff-and-flare dispenser controller that resides in the EWC. This allows for automatic dispensing under the control of the EWC upon threat-identification. The system can handle mixed payloads per dispenser, i.e. chaff and flares mixed in each dispenser. Semi-automatic and manual firing capability is also provided.
User-defined dispensing programs/sequences are selected by the EWC per identified threat. The dispensing techniques can be defined in the threat library for the EWC and uploaded to the system on the flight-line.

The jettison of all payloads is possible in all modes of operation under emergency conditions.

<<Pic Credits to owner>>



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