It was first experienced by Taiwanese F-86 pilots during the Quemoy clashes with China in 1958. Their AIM-9B early-model Sidewinders had unfiltered seekers tha

It was first experienced by Taiwanese F-86 pilots during the Quemoy clashes with China in 1958. Their AIM-9B early-model Sidewinders had unfiltered seekers that considered the Sun as attractive a target as jet exhaust. Later models had bandpass filters to prevent that. The contemporary AIM-4 Falcon missile had a much more sophisticated seeker but had to be cooled before firing and was useless once the coolant ran out, for example if the pilot took too long to get a lock. Modern IR-guided missiles use imaging IR sensors and actually recognise target shapes.