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This presentation focuses on the results of the application of the Permanent Scatterers Technique (PSInSARÂ¿, an advanced InSAR technique capable of measuring millimetre scale displacements of individual radar targets on the ground) as a method for measuring deformation in volcanic area within the Globvolcano project. In this project, T.R.E. takes part as a service provider for the Deformation Mapping products. Three cases of PSInSARÂ¿ application are presented: Piton de la Fournaise (Reunion Island), Stromboli and Volcano (Eolie, Italy). More than 200 ENVISAT ASAR scenes have been processed to estimate the velocity field of the volcanoes surface, as a consequence of the magmatic camera evolution; time series of displacement have been extracted and, whenever possible, ascending and descending geometry dataset have been jointly exploited in order to produce vertical and easting displacement maps. The test cases presented will give the opportunity to describe the enhancement applied to the PSInSARÂ¿ processing chain, required to make the algorithm capable to cope with the complex volcanic deformation dynamics (abrupt changes, non-linear motion) and to allow their representation through a web interface for a quick browsing of the results provided to the users.