No, Im asking how often the code runs the check if something is inside the missiles proximity fuze radius. If the missile for exampe is traveling 3600 km/h, thats 1000 meters per second, so if the check runs at 100hz, that means the missile will have traveled 10 meters per check and can easily have passed the target, especially at the exremities of the proximity fuze radius / sphere. At 1000 hz its 1 meter, but still a good chance it will the target at the extremity of the radius/sphere.