Spaceborne L-Band Forest Tomosar: A First Case Study

In this work we present a first spaceborne L-band forest SAR Tomography (TomoSAR). We process a stack of 9 real SAOCOM acquisitions over Amazonas, a scenario mostly consisting of tropical rainforest with average tree height of about 25 m to 35 m. We phase calibrate the stack with Phase Linking algorithm, in order to obtain a consistent reconstruction of forest over terrain and compare TomoSAR results with different spectral estimators. We achieve good results with MUSIC spectral estimator, coping with spatial and temporal baselines and compare the upper TomoSAR envelope with LiDAR forest height. The overall agreement is quite good, confirming the effectiveness of our approach.