http://www.ausairpower.net/SP/DT-Helo-Survivability-June-2009.pdf
Hews Helicopter Electronic Warfare Self Protection System
IMO, a helicopter is still a sitting duck. A flare or chaff system will be effective in some situations, non-effective in others, it has it's limits as well.
HEWS is the Integrated Self Protection System, developed by ASELSAN for fixed and rotary wing aircrafts. Integrated around the Suite Central Processing Unit, HEWS provides situational awareness and threat specific countermeasures during mission with;
Radar Warning,
RF Jamming,
Missile Warning,
Chaff/Flare Dispensing,
Laser Warning,
IR Countermeasure integration capabilities.
HEWS is an Integrated EW Self Protection System for air platforms designed so as to provide Maximum Protection for the aircraft with Minimum Workload for the crew. Information from the subsystems are gathered, evaluated and after data fusion and decision process, the most appropriate countermeasure technique is applied.
Suite Management
State of the art Integrated Self Protection System approach based on a sophisticated suite central processing function for the EW suite
Flexible and modular integration around a Central Management Unit that provides open architecture to host additional EW subsystems according to the user requirements
Dual redundant MIL-STD-1553B EW Bus architecture
Support of various communication standards: MIL-STD-1553, RS-485, RS-232, ARINC-429, Ethernet
Integration with on-board avionics
Simultaneous evaluation of the threat, situation, aircraft and intelligence data
Full situational awareness for the pilot
Missile Warning
Missile Warning System based on passive ultraviolet technology
360° spatial coverage in azimuth by 4 sensors
4 steradian spatial coverage by 6 sensors
High probability of detection
High spatial resolution
Low False Alarm Rate (FAR)
Detection of missile threats at initial launch phases (provides maximum time for countermeasures)
Fast reaction for countermeasure dispensing
Multiple threat analysis and tracking capability
No need for special cooling
Chaff/Flare Dispensing
Fast reaction following threat detection
Fully programmable Mission Data File architecture
Designed for seamless glass cockpit integration
Application of optimum countermeasure technique specific to the threat, managed by Suite Central Processing Unit
Minimum workload for the pilot in a very dense threat environment
Auto, Semi-Auto, Manual and By-Pass operating modes
Simultaneous dispensing
Numerous Chaff/Flare dispensing programs against RF and E/O guided threats
Continuous inventory report and warning when payload quantity is critical
Maximum redundancy through by-pass lines
Automatic misfire detection and correction with the same type of payload
Utilizes standard NATO cartridges and compatibles
Fast reaction through discrete countermeasure dispense selection
Radar Warning
Fast threat detection, threat classification and identification of the threats defined in the Mission Data File
Handling Pulse, CW and complex (any combination of pulse and CW signals) radar signals
Long range detection and high Probability of Intercept
High accuracy of Direction of Arrival
Operability in very dense threat environment
Fully programmable Mission Data File architecture
Detection capability for threats specified as unknown threat
360° spatial coverage
RF Jamming
RF energy transmission enabling deceptive and noise jamming techniques in a dynamic threat environment
Tracking and jamming the threats autonomously
Phased array antenna and solid state transmitter architecture
Fully programmable Mission Data File architecture
Software controlled interfaces
360 spatial coverage
Laser Warning
Detection of laser designator, beam rider and range finder threats
360° spatial coverage
High accuracy of Angle of Arrival
High sensitivity and Probability of Detection
Low False Alarm Rate (FAR)
Fully programmable Mission Data File architecture
IR Countermeasure
Integration of IRCM equipment to HEWS Suite
and more...
Full glass-cockpit compatibility
Advanced Man-Machine Interface with Multi Function Display (MFD) support
Night Vision Goggles (NVG) compatibility
Descriptive and adaptive symbology on Multi Function Display for fast recognition of threats
Programmable audio messages and alerts for maximum situational awareness including threat tipe and direction of arrival
In flight event and RWR Pulse Description Word recording
Single-point uploading/downloading of multiple Mission Data File and mission records through Pilot Control Panel
Various levels of BIT support
Software Support Station for Mission Data File generation and Post Mission Data Analysis
Built-in pilot training mode
Interoperability of each sub-system with each other