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Polarimetric SAR Tomography

In this paper, different approaches of airborne SAR tomography are presented. A SAR tomographic data acquisition system can be represented like an antenna array. The use of high-resolution methods is indicated to the concept of aperture synthesis for 3D-imaging using SAR data. Techniques presented are the standard Fourier-, Capon-based beamforming methods to improve the resolution quality. In order to estimate the nature of retrieved target, a polarimetric approach is introduced based on the modified high-resolution MUSIC algorithm. Finally, experimental results are shown using a multibaseline data set acquired in L-band by DLR’s experimental SAR (E-SAR) on a test site near Oberpfaffenhofen / Germany.