The interaction between the ground bounce return and the aircraft return creates several blind regions where the aircraft cannot be detected. The location of these regions can be calculated based on height and frequency. But this is not a common way to escape radar detection because these areas do not form a continuum in which the aircraft can inscribe its trajectory, they are rather small discontinuous regions between which the aircraft will be detected: the radar will see a dotted trajectory that a good filter will be able to reconstruct completely.