Lockheed Martin has won a $400 million contract to build a high-altitude airship demonstrator featuring radar technology powerful enough to detect a car hidden under a canopy of trees from a distance of more than 300km (160nm).rnThe Integrated Sensor is Structure (Isis) programme aims to replace several airborne surveillance platforms, including the US Air Force's Boeing E-3 airborne warning and control system and Northrop Grumman E-8C JSTARS airborne ground surveillance air-rncraft with a fleet of stratosphere-roaming airships.rnSelected by the US Defense Advanced Research Projects Agency (DARPA) and the USAF over Northrop, Lockheed's Skunk Works division will build and fly a demonstrator aircraft with a scaled-down sensor system in fiscal year 2013.
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