Enhancing Dispersion Quality Using Three-Component Polarization Beamforming in Linear Array

Summary Passive surface-wave methods have found extensive application in near-surface investigation due to their benefits of low costs, noninvasiveness, and high accuracy. Linear arrays are usually adopted in urban environments for their convenience and efficiency. For single-component beamforming, the limited azimuthal coverage lacks the ability to attenuate velocity overestimation caused by directional noise sources. We proposed a three-component polarization beamforming method in linear array to enhance the dispersion quality. Compared to traditional single-component beamforming, our method fully exploits the polarization information of signals, significantly improving the localization accuracy and resolution of noise sources.