1. Centre Tecnològic de Telecomunicacions de Catalunya (CTTC/CERCA), Spain
2. University of Firenze, Italy
3. Instituto Geológico y Minero de España (IGME), Spain
4. Instituto Geográfico Nacional (IGN), Spain
5. Italian Civil Protection Department, Italy
6. Istituto di Ricerca per la Protezione Idrogeologica (IRPI), National Research Council (CNR), Italy