The U.S. Air Force awarded Northrop Grumman Corp. a $240.7 million contract for three Global Hawk unmanned aircraft of the Block 30 variety, according to an Aug. 15 Pentagon announcement. The aircraft will be equipped with enhanced integrated sensor suites and airborne signals intelligence payloads.

The contract modification includes two additional airborne signals intelligence payloads as retrofit kits.

The Air Force Life Cycle Management Center at Wright-Patterson Air Force Base in Ohio awarded the deal.

Northrop Grumman (NYSE: NOC) engineers the aircraft at its unmanned systems center in Rancho Bernardo, and builds them in Palmdale.