A georadar section was recorded by ANDRA in an inclined well which traverses a granitic formation in presence of fractures. The emitting antenna is situated near the well head, the receiving antenna is moved within the well every 1 m. The entire georadar section (140 sensors) shows different wave types:
Firstly we propose to determine the formation's velocity and secondly to estimate the lateral offset of a major diffracting point in relation to the well, whose apex is situated at 43 m on the shadowed side. The formation velocity and the lateral offset can be determined by velocity correction carried out in the frequency domain by applying delay distributions to the georadar data (Convolution product : application to the translation of a wavelet and Convolution).