0 500 1000 1500 2000 2500 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Pole Surface Consistency Imaginary (Hz) Zeta (%) cluster pole & vector pole frequency conjugate non realistic 1/condition Figure 3. Pole Surface Consistency Diagram with Final Autonomous Estimates 0 500 1000 1500 2000 2500 0 0.2 0.4 0.6 0.8 1 1.2 1.4 Pole Surface Density Imaginary (Hz) Zeta (%) 1 10 20 30 40 Density Figure 4. Pole Surface Density Diagram Figures 3 and 4 presents the same information previously shown in Figures 1 and 2. Note that in all cases, suppressing the obvious spurious computational poles results in a substantially cleaner consistency diagram with clear indications of the pole locations. This translates to the Pole Surface Diagram as well. Note that suppressing spurious modes entails a risk that some 369
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