Evaluation of α_s1 for Building Damage Mapping based on Touzi Decomposition

A prompt and accurate assessment of building damage is critical for disaster assistance and emergency monitoring. Polarimetric synthetic aperture radar (PolSAR) has become one of the most effective methods in damage assessment, owing to its all-weather/all-time observation ability and abundant polarization scattering information of target. In this study, we discussed the distribution law of Touzi decomposition polarization parameters before and after building collapse, based on the ALOS PALSAR data in the L band and the simulated SAR images in the Ku band. The experimental results show that the a
s1
component obtained by Touzi decomposition can be used for building damage assessment, and is universal in L-band and Ku-band SAR images.