I present a novel processing approach for three-component seismic array data that entails a succession principal component analysis, factor analysis, and principal component analysis. This formulation represents an effort to conduct principal-component polarization analysis on isolated signals whose propagation direction and apparent direction have been estimated a priori using high-resolution ??? analysis. A comparison of the signal parameter estimates realized using single-site three-component, vertical-component array, and three-component array data is provided. ¿ American Geophysical Union 1996