Data produced as part of ESA Terrafirma project. The PSI processing has been carried out by TRE ([email protected]). PSI processing used 33 scenes of ENVISAT data. Number of of points = 846, Point density = 83.2 PS/km2, Reference point location is lon: 9.42067581154, lat: 44.5335011437. 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.