f Transmission and reflection tomography using Gaussian beams

Since over seven years DMT - Institut für Angewandte Geophysik has developed soft-and hardware to perfom tomgraphic surveys in mines and between boreholes and tunnels (Gelbke, 1985; Gelbke et al., 1988; Krajewski et al., 1989). The new development of a program package to invert traveltime and amplitude data wil! be presented. For the inversion not only the first arriving traveltimes or amplitude onsets but also the later arrivals from refracted and reflected waves are used.