Fig. 3

Wave packet propagation for element 22: amplitude (a–c) and frequency (d–f) profiles. Panels b and e show spatial profiles at \(t=25\) s (dashed red line) and 40 s (solid red line). Panels c and f show temporal profiles at the satellite location \(z=z_\text {S}\) (black solid line), black markers represent the data from Fig. 1. Times 25 and 40 s are shown in panels a, d by horizontal lines and in c, f by vertical lines. Location \(z=z_\text {S}\) is shown in panels a, d, b, e by vertical lines