Fig. 5. Waveforms recorded in electrolytic solutions with the 20-cm probe connected to (a) the 4-m long coaxial cable and to both (b) the 4- and the 16-m cables. In both cases the reflection coefficients reach a flat plateau after few reflections. The long-time reflection coefficients to be used in the Eq. [32] through [34] is measured at about 600 ns.