Taper for stf inversion
Using "TAPER_STF", the length of the taper is calculated by using the main frequency given in the source file. If the filter frequency of the seismograms is significantly lower than the main frequency, the wavelet is cut at the end. This leads to a high frequency component in the synthetic seismograms.
WORKAROUND: Use the taper of the stf instead of "TAPER_STF". This taper is specified in the string of "PARA" ("irtap=...") and the length of the taper is given by hand. More information are given in the manual.
In the future, "TAPER_STF" will be enhanced (by using the filter frequency for calculating the taper length) or removed.