Raytheon Co. was awarded a $125.3 million contract to modernize and add new capability to a U.S. Air Force early warning radar system designed to detect and defend against missile launches, the Tewksbury, Mass.-based company announced Sept. 12.

The contract, awarded by the Air Force and U.S. Missile Defense Agency calls for Raytheon to upgrade a large phased-array radar in Clear, Alaska, by the end of 2017. The upgraded radar will provide targeting data that can be used to shoot down incoming ballistic missiles.