 For Configuration 3 units, the Patriot radar was completely redesigned, adding another travelling wave tube (TWT) that increased the radar's search, detection, tracking, and discrimination abilities.The PAC-3 radar is capable, among other things, of discriminating whether or not an aircraft is manned and which of multiple reentering ballistic objects are carrying ordnance.The PAC-3 upgrade carried with it a new missile design, nominally known as MIM-104F and called PAC-3 by the Army.