Data produced as part of ESA Terrafirma project. The PSI processing has been carried out by Gamma (). PSI processing used 29 scenes of ERS data. Number of of points = 223, Point density = 60 PS/km2, Reference point location is lon: 21.708620, lat: 39.308104. 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.