nz = Impedance_nz
       izrms = Impedance_izrms
       zmin = Impedance_zmin
       zmax = Impedance_zmax
       dz = Impedance_dz
       dzmin = Impedance_dzmin
       NonZeroRho_IZMin = Impedance_NonZeroRho_IZMin
       NonZeroRho_IZMax = Impedance_NonZeroRho_IZMax