Moving peak S/N between the measurement and FETD simulation for the DM (dashed blue), HM (solid purple), and DM–HM difference (solid brown) signal. Here, the mean power of the simulated signal is normalized to that of the measured one and the length of the moving window is 0.5 ns. Of the center frequencies, 10.1 and 12.9 GHz, the superior overall level is obtained in the latter case, where the peak S/N for DM is maintained over 10 dB (horizontal dashed line) on the interval 11.95–13.4 ns starting in the Mantle I zone, continuing through the void zone almost to the end of the mantle II zone.