GNGTS 2018 - 37° Convegno Nazionale

772 GNGTS 2018 S essione 3.3 Fig. 2 - a) First FWI gradient with respect to Vp parameter (left) and Vs parameter (right) after applying the Bessel smoothing filter; b) The FWI models reconstructed by multi-parameter FWI; the black rectangles indicate the position of the target; c) 1D Vp (left) and Vs (right) profiles in correspondence of the target. Fig. 3 - Vp model (a) and Vs model (b) after multi-parameter FWI; 1D profiles for Vp parameter (c) and Vs parameter (d) after FWI; e) True versus Initial data comparison for the improved initial model; f) True versus FWI data comparison after starting from the improved initial model.