Differential SAR Interferometry with TerraSAR-X TOPS Data: Mexico City Subsidence Results

Inhalt:
In this paper we investigate the possibility to exploit TOPS (Terrain Observation by Progressive Scan) data to measure ground displacement movements by means of Differential SAR Interferometry (DInSAR). Several critical points (i.e. coregistration) have to be faced during the data processing since, due to the TOPS signal characteristics, the interferometric chain is very sensitive to small implementation errors. The obtained results will be compared with the ones conventionally retrieved when applying DInSAR on stripmap data. Finally, the potential of DInSAR measurements, when combining TOPS and stripmap data by means of point-like scatterers, will be also analysed.