Testing polarimetric SAR Tomography by Continuous Wave radar and Compressed Sensing for under soil hidden coherent targets

Synthetic Aperture Radar (SAR) Tomography is able to detect targets, measuring their position extended in the height dimension. SAR tomography has the problem that, in order to achieve high resolution in the vertical direction, a Multi-Baseline (MB) radar geometry with a great vertical aperture has to be designed. In SAR Tomography, the tomographic resolution is also inversely proportional to the slant range length and classical pulsed radars has the limitation to work over the slant range distance occupied by the pulse duration space. This paper gives a solution to aver-come this limitation, using a Linearly Frequency Modulated Continuous Wave (LFM-CW) radar. The work proposes to process MB SAR data in a full polarimetric configuration, tested on different physically constituted SAR environments. The results are estimated using the Capon Fourier based spectral estimator and the Compressed Sensing, assisted by atomic decomposition and confirms the feasibility to perform single-pass (SP) SAR-Tomography using LFM-CW radars, suitable for Unmanned Aerial Vehicle (UAV) applications.