Color code shows rank correlation coefficients τ_Kendall (top), R_Pearson (mid) and R_Spearman (bottom) between known input and extracted output OU parameters σ and θ of the generic OU time series for different values of m_σ vs. m_α, that is basically ϵ_σ vs. ϵ_α. The blue regions define values of ϵ_σ and ϵ_α that yield robust results for the extraction method. An analysis of the maximum valued for each rank correlation index yields environments of ϵ_σ = 0.343 ± 0.0036 and ϵ_θ = 1.48 ± 0.36.