I'm not an expert in electronics, physics, radar or anything like that.

I did think of ways the accuracy could be improved, some of the ways you mentioned. But I don't know if they are used in reality. It's why I asked for more information.

The systems in SAM Simulator seem too accurate to me as well. But I'm not sure if it's because we're guiding missiles more accurately than can be done in historical reality, or it's because targets do not try to dodge or avoid missiles. Or both reasons!

In some of the Vietnam era missions in SAM Sim, I can shoot down 10+ aircraft very easily. I managed to shoot down 13 aircraft a few times. This is WAY more than could be managed in reality.

And I can shoot down Gary Powers with nearly 100% reliability in the 1960 mission with one missile. In reality didn't they fire 12 missiles?

SAM Simulator seems much too accurate.