The data set was recorded with 72 vertical geophones and a hammer blow was used as a source. It was recorded and investigated by Zacharias Stelzer during his diploma thesis (Stelzer, Z., Acquisition and interpretation of surface waves for waveform inversion (written in german), diploma thesis in preparation, Karlsruhe).
A joint inversion of the whole wavefield spectra (including both body and surface waves) and the p wave arrival times was applied to this data set.
Raw seismogram gather
In this figure wavefields caused by the forward (black) and reverse (red) shot are shown.
Velocity model which results from the joint inversion:
The following subsurface model was derived from the data set of the reverse shot.