Lockheed Martin was awarded a contract valued up to $1.85 billion by the U.S. Government to initiate the upgrade of 145 Block 20 F-16A/B aircraft for the Republic of China. This retrofit program will include the addition of an Active Electronically Scanned Array (AESA) radar, embedded global positioning, as well as upgrades to the electronic warfare and other avionics systems of Taiwan's F-16s. Lockheed Martin has upgraded more than 1000 existing F-16s for a combination of the U.S. Air Force (USAF) and international customers. Most recently, Lockheed Martin was named the prime integrator to upgrade the USAF F-16 fleet. Both new upgrade programs will be based on the F-16V configuration announced by Lockheed Martin earlier this year.