Additionally, Tables and gather the computed values of the impedance errors MSE norm,𝑍 exp , MSE norm,𝑍 exact , and MSE 𝛾 norm,exact for the opt-, GCV-, and mGCV-based hyper-𝜆 methods, including when the number of collocation points increases. We noticed that both scores were lower for the hyper-𝜆 methods, i.e., these methods led to more precise impedance recoveries of the Gerischer and PWC models compared to RR.