LM's AGM-158 - AviatorsBuzz
Source LM

Currently deployed on the United States Air Force B-1 Lancer, B-2 Spirit and B-52 Stratofortress bombers and F-15E Strike Eagle, F-16 multi-role fighters, the AGM-158 Joint Airto- Surface Standoff Missile (JASSM) is a 14 foot long, 2,250 lb autonomous, stealthy, long range standoff missile designed to destroy high value, well defended fixed or relocateable targets, from ranges of over 200 nautical miles. Th e missile is also in service with the armed forces of Australia, Finland and Poland. Powered by the Teledyne CAE J402-CA-100 turbojet, the autonomous navigation based on inertial and Global Positioning System (GPS) programmes, the missile follows a pre-planned low-level terrain following route to the target area. Once in predesignated location, the missile uses its Imaging Infra-Red (IIR) seeker of medium wavelength sensor using a 256 x 256 Focal Plane Array (FPA) and on-board, real-time Automatic Target Correlating (ATC) algorithms to precisely locate and strike the desired target aim point.

 The missile can also engage enemy jammers. Lockheed Martin’s ATC algorithms use an insensitive, redundant approach and realtime processors to provide a robust system that significantly reduces the missile’s Circular Error Probability (CEP) impact any time of the day or night. This gives the missile ability to hit a precise spot, such as a specific point in a hardened bunker, cave entry or ventilation shaft, using a target model built months earlier. To make the missile more immune to GPS deception and jamming, JASSM Block 1A missiles are equipped with Selective Availability/Anti- Spoofi ng Module (SAASM) technology, which itself is an enhanced, digital antijam GPS receiver. This capability gives JASSM the ability to successfully complete its mission even in intense jamming environments. JASSM is equipped with a WDU-42/B (J-1000) 1000 lb dual mode blast-fragmentation penetration warhead with 240lb of AFX-757 for maximum effect against hard targets. A unique feature of the current model of JASSM is its capability to send back a sequence of pre-strike images of the target, just before impact, the process providing partial Battle Damage Assessment (BDA) capability.

Further improvements of AGM-158B JASSM-ER will include an improved engine and larger fuel capacity, with an improved two-way datalink which will provide flexible re-targeting of the missile, including tracked, moving maritime targets. Th e ER version maintains the same outer mould lines of the stealthy airframe, which makes JASSM extremely difficult for air defence systems to engage. It also retains the dual mode penetration and blast fragmentation warhead of the baseline JASSM missile. This capability will transform JASSM into a network-enabled system, providing inflight re-routing, retargeting, or aim-point refinements and blue-force tracking, to eliminate fratricide risks.

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Nitin Konde is a freelance journalist with an experience of more than a decade. Being a freelancer, he has covered various domains in his field such as Sports, Biotechnology, Defence etc. and has been associated with brands like The Times of India, Vayu Aerospace and Defence Review Magazines. Since the last three years he has been focusing and writing extensively on the defence sector, he is here to share his expertise with our readers on AviatorsBuzz.