Ambiguity Question in Kinematic Multilayer Refraction Inversion

For the description of realistic geological models it is important to develop an inversion method that is able to calculate slow lateral changes in the model parameters. But laterally varying parameters of a multilayered structure can cause ambiguity in the inversion process. This is a problem in the use of the kinematic multilayer refraction inversion method developed in the University of Miskolc, because it can interpret laterally changing model parameters (layer thicknesses, and propagation velocities) (for a maximum of 5 geological layers in the same process) described by continuous basis functions expanded in series. The reduction of the arising ambiguity question could be reached by searching for the optimal number of coefficients in the inversion method and it is also important to use different coefficient numbers or different basis functions for the description of the ambiguous parameters. Thus no joint or constrained inversion techniques are needed for the interpretation; our inversion method with simple, quick ray tracing forward modelling is able to handle the ambiguity problem.