Persistent Scatterer Detection and 3-D Reconstruction of Transmission Tower in Mountain Area Based on SAR Tomography

In this work, an effective 3-D reconstruction method for the transmission tower in mountain area, which combines the Persistent Scatterer Interferometry (PSI) and SAR Tomography (TomoSAR) based on generalized Orthogonal Matching Pursuit (gOMP) algorithm, is proposed. This paper is focused on reconstruction performance of gOMP algorithm on SAR signal and the 3-D reconstruction of transmission tower, using the results obtained in mountain area on simulated and real TerraSAR-X data. The vertical signal of slant distance from SAR images can be regarded as sparse signal, so the gOMP algorithm can be used to obtain extraction of elevation and deformation rate of transmission towers in mountain area. When only primary and secondary scattering points is present in each range-azimuth resolution cell, this method can be exploited to estimate the elevation and the deformation rate of the transmission tower. The results have demonstrated the advantage of this method.