AN/ALE-55 Fiber-Optic Towed Decoy
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The AN/ALE-55 Fiber-Optic Towed Decoy, or ALE-55, is an
Overview
The ALE-55 is an RF countermeasure designed to protect an aircraft from
Defensive techniques
The ALE-55 provides three layers of defensive jamming against a radar-based threat: preventing radars from tracking, breaking radar locks, and acting as a target for incoming missiles.[1]
Suppression
The system detects a threat radar in its acquisition mode and tries to prevent it from locking by using jamming techniques. The onboard electronic warfare package analyzes the threat, while the towed decoy emits the jamming signals to confuse the tracking radar.
Deflection
In the case that a radar obtains a lock on the aircraft or decoy system, the electronics on board the aircraft analyze the emissions and then determine the optimum jamming technique to break the radar lock. The jamming is done by the decoy. The ALE-55 also possesses the useful ability to send out multiple jamming frequencies if more than one radar is locked on to the decoy or aircraft.
Seduction
When a missile launch is detected, indicated by the difference in radar signal and type, the ALE-55 runs a last resort attempt to protect the aircraft towing it. This last resort is becoming the target, rather than the aircraft, by trying to jam the missile or simulating the aircraft's radar signature.
Components
The ALE-55 consists of two components. An onboard signal conditioning assembly and fiber optic towed decoys.[1]
The onboard electric frequency converter analyzes radar signals detected by the plane's electronic warfare system and calculates an appropriate jamming and spoofing signal, which is then transmitted to the FOTD through a fiber optic cable.
The towed decoy has dual high power
Operators
See also
References
- ^ a b c "BAE Systems AN/ALE-55 Fiber-Optic Towed Decoy". Archived from the original on 2010-01-02. Retrieved 2010-02-23.
- ^ deagel.com ALE-55
- ^ a b ALE-55 Towed Fighter Decoys for US Navy, Australia