1. CIMA Research Foundation, Savona, Italy
2. DICCA, Department of Civil, Chemical and Environmental Engineering, University of Genoa, Genoa, Italy
3. Department of Information Engineering, Electronics and Telecommunications, Sapienza University of Rome, Rome, Italy
4. Department of Civil and Environmental Engineering, Politecnico di Milano, Milan, Italy
5. Geomatics Research & Development srl, Lomazzo, Italy
6. European Space Agency (ESA-ESTEC), Noordwijk, The Netherlands