Since early ninety’s Synthetic Aperture Radar Interferometry (InSAR) has been exploited for geophysical applications. InSAR technique is capable to capture information on surface deformation and can be a useful tool for monitoring active seismic and volcanic areas. Despite the capability of SAR sensors to operate in all weather and day/night conditions, SAR signal is affected by different source of noise (e.g. water vapour or instrumental noise) [Hanssen, 2001]. These disturbing sources affect the accuracy of InSAR deformation map, especially for time series analysis, and the quality control of InSAR measurements, either standard differential interferometry and Persistent Scatterers Interferometry (PSI), is not an easy task. A fruitful solution is represented by the adoption of passive...