If the launching aircraft has an A2A radar, newer versions of the Sidewinder can use LOAL (lock on after launch) because their sensors are so sensitive. The rad

If the launching aircraft has an A2A radar, newer versions of the Sidewinder can use LOAL (lock on after launch) because their sensors are so sensitive. The radar cues the seeker head prior to launch, so it knows where to search. Missile is launched, seeker head acquires target, boom.