Opportunity to study the upper part of section based on full-wave numerical simulation

The possibility of studying mechanical characteristics of low velocity zone and the upper part of section based on full-wave numerical simulations. We study the possibility of restoring properties of the medium by dynamic characteristics of its response without allocating it specific types of waves. We analyze the wave process, as it is. Results showed working capacity of the approach. In terms of detail restore the idea of using medium response without dividing it into types of waves seems to be very promising. Obviously, this approach is accompanied by intensive computations, which probably hindered its development earlier.
Materials and methods
Numerical simulation, correlation analysis.
Results
Despite a somewhat straightforward approach to solving the problem, the results of restoring sections in general agree well with the original model of velocity profiles. This shows the working capacity of the method. For some cases, there are sharp emissions on sections which absent in the original structure of the section. This may indicate some instability of the inverse problem. Probably, in this case it relates to a duration modeling (0.06 s), which limits the impact of the deeper properties of the medium to the shape of the simulated signal
Сonclusions
Results showed working capacity of the approach. In terms of detail restore the idea of using medium response without dividing it into types of waves seems to be very promising. The idea to use the response of the medium is completely without dividing it into types of waves appears to be very promising in terms of detail and informativeness of recovery. Obviously, this approach is accompanied by intensive computations, which are probably hindered its development earlier. Of course, a direct search of all possible variants is not the best way to develop such an approach. As a priori information can be used the results of already known methods. We assume that the further development of this approach will be in the direction of adaptive recovery characteristics of the medium model.