MONITORING COMPLEX SURFACE STRUCTURE BY SEVERAL INTERFEROMETRIC STACKING TEQUNIQUES WITH PALSAR-1 DATA

With some complex surface structure, it is difficult to understand the surface displacements by using SAR data. In addition to the complex geometry, identifying and understanding the surface displacements becomes quite challenging when non-linear displacements exist. There are several types of the interferometric stacking approaches, and each approach has different characteristics to estimate the displacements. In this paper, the conventional PSI, NN-PSI, and SBAS techniques are applied to a PALSAR-1 dataset, and the resulting displacements are compared. By using the three approaches, it is possible to understand the surface displacements in the study area, and the strength and drawback in each techniques are recognized. It is also recognized that the spatial baseline distribution should influence the displacement estimation of PSI approaches according to the EV-spectrum.