Radiometric Issues in Adaptive Polarimetric Sar Tomography

Multibaseline (MB) SAR tomography (Tomo-SAR) is an advanced mode of SAR interferometry, allowing full 3D imaging of volumetric and layover scatterers along the azimuth, range and height dimensions. Recently, this technique has also been extended in a polarimetric sense (PolTomo-SAR), exploiting MB SAR data acquired with different polarization channels. In this way, the joint estimation is possible of the height of the multiple scatterers and a set of complex coefficients describing their polarimetric scattering mechanism. In this work, a possible remedy is proposed to mitigate relative channel unbalances which affect the polarimetric version of super-resolution adaptive tomography. Finally, adaptive PolTomo-SAR radiometric analysis results are reported of MB airborne polarimetric P-band SAR data, acquired over a forest site.