Fig 6.

WSS magnitude contour plots for the 3 truncations (upper panel) and WSS magnitude scatterplots for the T₀ versus T₁ comparison and for the T₀ versus T₂ comparison, respectively (lower panels) for the model P₁. The error RMSs defined by Equation 4 corresponding to the 2 scatterplots are 17% and 31%, respectively. The arrows indicate the locations where the area with maximum WSS values diminishes from truncation T₀ to truncation T₂ and a new area with a local maximum forms in truncation T₂.