[Horatio Gates]

The crew reported that a missile system locked on to their aircraft and that a missile was fired.

That would be radar guided if they knew they were locked on to

[Anti-Bubba182]

That’s what I thought, unless they are guessing or could tell
if the missle chased a decoy flare.

[A.A. Cunningham]

The AN/AAQ-24 can detect an IR missile launch.