Data produced as part of ESA Terrafirma project. The PSI processing has been carried out by AI ([email protected]). PSI processing used 22 scenes of ERS-1 ERS-2 data. Number of of points = 593982, Point density = 169 PS/km2, Reference point location is lon: 6.948313, lat: 51.094428. 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.