Data produced as part of ESA Terrafirma project. The PSI processing has been carried out by GRS ([email protected]). PSI processing used 84 scenes of ERS-1 ERS-2 data. Number of of points = 402, Point density = 36.64 PS/km2, Reference point location is lon: 16.1391934999, lat: 40.3971947991. 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.