No, it should be 2.5, but scan though the pattern to make it effectively 4.6 because it’s not like it actually impacts the detector of the Sidewinder itself.
This sort of nutating effect is already in game with IRCM systems, and FoV reduction IRCCM. So it would absolutely be possible to model using existing methods.
Figured some here might like this, but I went back through my recently acquired AV-8A/C/S and TAV-8A/S modelling guidebook, and came across this photo of a Spanish AV-8S in US markings: