As seen in the figure below, the water table usually defines the base of the p-wave weathering layer, but since s-waves are not influenced by fluid filled pore space, the shear component static is unrelated to the p-wave static and needs to be solved on its own.
Due to slow s-wave velocities and their high variability in the near surface we cannot rely on traditional methods. The static solution must match what is seen in the conventional p-wave section that is often processed alongside the converted wave dataset. Shear wave statics must also be calibrated to align with the expected or measured values of γ (VP/VS).
Resolving the static shifts related to the upgoing shear wave can be one of the most difficult problems in converted wave processing but Absolute has the tools and experience needed to solve it.