General Atomics Aeronautical Systems’ recent first transatlantic flight with an MQ-9B Sky Guardian unmanned air vehicle provided an early glimpse of a future key capability for the UK Royal Air Force, with its Protector derivative also representing a major opportunity for electronic warfare system supplier Leonardo to get on board.

Following the Sky Guardian’s early July arrival at RAF Fairford in Gloucestershire for a static display appearance at the Royal International Air Tattoo, General Atomics announced a pact to offer Leonardo’s Sage electronic intelligence and electronic support measures payload with the medium-altitude, long-endurance type.

The package installed on the general aviation aircraft had a total system weight of around 16kg (35lb), including two sensors each at the front and rear, plus high-accuracy direction finder interferometers mounted on its wing tips.

During a 40min demonstration conducted at altitudes of up to 7,500ft, Leonardo demonstrated the equipment’s capabilities. A digital system with 360˚ radar warning receiver coverage, Sage provides a passive means of detecting, identifying and geo-locating ground-based emitters such as fire-control radars, supporting situational awareness and warning of emerging risk to aircraft.

“Pop-up threats can appear anywhere,” notes Leonardo systems engineer Fiona Clark, part of the capability team tasked with conducting the trials. She describes Sage’s ability to precisely geolocate threats – including low probability of intercept radars – using a single platform as “one of the key descriminators” of the company’s technology, noting that most of its rivals remain restricted to searching only.

General Atomics is also confident of attracting buyers for the Sky Guardian addition. “Almost all customers have specified that they would like an ESM solution,” notes Rob Walker, the company’s senior director, strategic development.

In addition to offering Sage as an option for Sky Guardian and Sea Guardian customers, and potentially also the RAF’s Protector fleet, Leonardo sees strong potential to integrate more of its equipment onto the MALE type.

Speaking at the Farnborough air show, Alastair Morrison, the company’s deputy managing director UK, also identified its BriteCloud active decoy, Miysis directed infrared countermeasures suite, Osprey and Seaspray active electronically scanned array radars and an infrared search and track sensor as potential payloads.

General Atomics is also investing internal research and development funds to trial the integration of Ultra Electronics-supplied sonobuoys with the MQ-9B, as a pod-housed option for the Sea Guardian.


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