 However, the most significant upgrade to the PAC-3 missile is the addition of a Ka band active radar seeker.This allows the missile to drop its uplink to the system and acquire its target itself in the terminal phase of its intercept, which improves the reaction time of the missile against a fast-moving ballistic missile target.The PAC-3 missile is accurate enough to select, target, and home in on the warhead portion of an inbound ballistic missile.