The Australian Department of Defence (DoD) has signed an NOK150 million (USD17.4 million) contract with Kongsberg Defence Systems for the integration of an additional terminal guidance capability with the stand-off Joint Strike Missile (JSM).
Designed for anti-surface warfare and naval fire support missions, JSM is a high-subsonic air-launched development of Kongsberg's Naval Strike Missile, funded by the Royal Norwegian Air Force (RNoAF).
Weighing 416 kg, JSM is 4 m in length, 48 cm in width (stowed), and 52 cm in height. Equipped with a programmable fuze, with custom-designed fuze programmes downloaded prior to launch, the missile features a 500 lb-class combined blast (primary effect) and fragmentation (secondary effect) high-explosive charge insensitive warhead encased in titanium alloy, with gross weight of 120 kg and an explosive weight of 100 kg (TNT equivalent). A Link 16-compatible two-way data link provides for target update, re-targeting, mission abort, and bomb hit indication communication.
Currently, guidance is delivered by inertial navigation, aided by global positioning and terrain contour matching systems. The missile features a terminal target acquisition capability with Autonomous Target Recognition enabled by an imaging infrared (IIR) seeker. Terminal accuracy is given at less than 0.6 m (distance between the aim point and actual hit point). The specific range of the missile has not been disclosed.
Under the provisions of the contract with the Australian DoD - announced in early April - Kongsberg will integrate and qualify a new low-cost, electronic support measure (ESM) capability with the current IIR package, enabling JSMs to locate targets on the basis of their electronic signature.
Developed by BAE Systems Australia, the ESM features a lightweight passive radio frequency (PRF) sensor with an additional land attack and littoral attack capability as well as a two-way communications line for target adjustment and inflight termination.
The four-channel digital ESM receiver (dimensions: 191 mm x 95mm x 64 mm) features a "better than 1è18 GHz RF Input", "better than 700 MHz instantaneous bandwidth", high precision direction finding (better than 2 root mean square), minimal phase group delay, minimal amplitude ripple, a dual conversion superheterodyne architecture, and an ethernet interface.
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