GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 3.2 - POSTER GNGTS 2023 e) Time cut: this filter offers the possibility to limit or to extend each recorded trace in time. This operation is truly worthwhile to eliminate the deeper part of acquired profile in which signals are hard to analyze. f) Kirchoff migration: this is a pre-processing phase realized in the time domain; velocities weighted summation, computed for each point of the profile basing on hyperboles of reflection present inside a preset bandwidth, is performed (Tillard et al., 1995). The migration is one of the most important filters that is performed if strong diffractions are present. The velocity for the Kirchoff migration was set to m/ns. Figure 2. 3D GPR model. Following this processing flow, all the processed data were used to realize a 3D model of the subsoil, using a code implemented in MATLAB to analyze and manage a large amount of data, calculating the average over voxel of 0.5 m x 0.5 m x 0.1 m. Finally the Voxler software (Golden Software) was used for the 3D rendering of the data. The model was realizing using both the data acquired with 600 MHz (up to 2 meters) and 200 MHz (from 2 meters up to 5 meters) antennas.