Data produced as part of ESA Terrafirma project. The PSI processing has been carried out by Gamma (). PSI processing used 29 scenes of ERS-1 ERS-2 Envisat data. Number of of points = 223, Point density = 60 PS/km2, Reference point location is lon: 22.7429955624, lat: 39.4656887475. 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.