“…Scattering mechanisms are very complex in urban areas due to multiple scattering by man-made structures (Margarit, Mallorquí, & Pipia, 2010). Urban digital elevation models (DEM) estimated by InSAR are thus generally not accurate, but several approaches to improving accuracy have been presented (Shabou, Baselice, & Ferraioli, 2012;Thiele, Cadario, Schulz, Thönnessen, & Soergel, 2007). Permanent scatter InSAR (PSInSAR) (Ferretti, Prati, & Rocca, 2001) and SqueeSAR (Ferretti et al, 2011) generate DEM with very high accuracy (millimeter scale), even for urban areas (Chaussard, Wdowinski, Cabral-Cano, & Amelung, 2014;Ferretti, Prati, & Rocca, 2000;Perissin & Wang, 2012;Stramondo et al, 2008).…”