Figure shows one depth slice in the cube at z=1450 m.
We observe that the reflection azimuth changes slowly with
the aperture angle, except at small angles where the uncertainty
is high. This slow variation is consistent with Figure since the reflection azimuth changes by 2while the aperture changes by 25.One can also notice that the maximum aperture angle obtained with ray-tracing, 35, is consistent with the aperture angle interval where the energy is high.
The reason may be that rays begin to overturn when the aperture angle is higher than 35.Indeed, the upper limit in ray-tracing is due to one of the ray beginning to overturn.