simulated impedance spectrum for testing calculation of DRT

The main data file (DAT) is a simulated Impedance dataset Z(f), created with ngspice. The data correspond to an electrical circuit consisting of 3 R-C elements and 3 R-CPE elements in series, The circuit and parameters of the elements are defined in the file .CIR; They correspond to those used by Schichlein et al in Journal of Applied Electrochemistry 32: 875–882, 2002 (see fig 3) and Boucamp Elec Acta 2018; with the purpose of testing different methods for calculating DRTs (distributions of relaxation times)