Data produced as part of ESA Terrafirma project. The PSI processing has been carried out by IREA (). PSI processing used 48 scenes of Envisat data. Number of of points = 39972, Point density = 7 PS/km2, Reference point location is lon: 15.599772, lat: 38.263463. Terrafirma service providers have been validated by the ESA funded ValProj (http://www.terrafirma.eu.com/product_validation.htm) and passed an assessment to be a certified service provider.