Time-depth conversion accounting for sharp discontinuities: the case of buried cavities

This contribution proposes a time-depth conversion of processed GPR data accounting for sharp discontinuities visible in the data, if any. Specifically, the focus is on the presence of buried cavities. Once that the presence of a cavity is deduced from the collected time-domain GPR data, the proposed time-depth conversion strategy allows a realistic final GPR image by accounting for different propagation velocities in the cavity and in the surrounding soil.