On 23 February, Saab rolled-out the first of three GlobalEye Swing Role Surveillance System (SRSS) special mission aircraft for the United Arab Emirates (UAE). Integrated to the Bombardier Global 6000, the SRSS’ marquee system is Erieye ER airborne early warning and control (AEW&C) system. The Erieye Extended Range (Erieye ER) uses an S-band active electronically-scanned array (AESA) radar equipped gallium nitride (GaN)-based transceiver modules (TRM), which both double the radar’s power-efficiency and provide a reported range improvement of 70% over the preceding Erieye AEW&C system.[1][2]
In addition to the Erieye ER, the GlobalEye/SRSS also incorporates a ground surveillance suite comprising of the Leonardo Seaspray 7500E active electronically-scanned array (AESA) radar and FLIR Systems Star SAFIRE III electro-optical and infrared (EO/IR) turret. The Seaspray 7500E provides an instrumented range of 320 nautical miles (i.e. 592 km) for surface surveillance.[3] It also includes synthetic aperture radar (SAR) with ground-moving target indication for building situational awareness on land.[4]
The Pakistan Air Force (PAF) operates the preceding variant, i.e. the gallium arsenide (GaA)-based TRM-equipped Erieye, providing an instrumented range of 450 km. There is no doubt that the Erieye ER is a substantial improvement over the Erieye, and with the PAF having three additional AEW&C systems on order from Saab, one might ask if the PAF is procuring the newer and much improved system. This is very unlikely considering the added costs of raising a new logistics chain and the high price of the Erieye ER.
The news of the PAF procuring three additional Erieye AEW&C comes from the journalist Alan Warnes, who cited PAF Chief of Air Staff Air Chief Marshal Sohail Aman.[5] The first was to be delivered in December 2017, with the remaining two in 2018. The intent is likely to scale the existing infrastructure overhead – i.e. which seemingly includes a depot-level maintenance, repair and overhaul (MRO) site for the Saab 2000 – and to bring the Erieye AEW&C fleet to the originally planned force of six aircraft (pre-2005 earthquake).
However, although the PAF will not benefit from the Erieye ER’s range advantage, Pakistan is adding the other elements of the GlobalEye/SRSS, such as enhanced surface surveillance, through other platforms. Thus, while Pakistan’s application differs – i.e. diffusing capability instead of concentrating it – the goal of enhancing the country’s intelligence, surveillance and reconnaissance (ISR) coverage is in place.
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