Chapter 1 Defines the general scattering problem, the SEM model, and the recognition methodology. 靠 Chapter �Covers the theoretical background on polarization concepts in narrow-band frequency measurements. Chapter �Covers the topics of broad frequency scattering and the novel estimation of the optimum polarization states. Chapter �Introduces another novel application based on a modified CPS set. Chapter �describes the extension of polarization scattering into the temporal domain and tackles the issue of estimating the optimum states based on temporal polarization data via the SEM. Chapter �introduces a kernel estimator to model the variation with aspect angle for a resonant-polarization data. Chapter 7 covers two topics: The first topic of this chapter covers the concept of optimum bistatic scattering. The second topic will be on examining a signature pattern established by resonance energy as a function of polarization direction and aspect angles.