1. International Research School of Planetary Sciences, Università d’Annunzio, Pescara, Italy
2. Department of Hydrology and Water Resources, The University of Arizona, Tucson, Arizona, AZ, USA
3. The Institute of the Earth’s Crust, Russian Academy of Sciences, Siberian Branch, Lermontova, Irkutsk, Russia
4. c/o 170 Gardner Drive, Aberdeen, UK
5. Center for Spatial Information Science, The University of Tokyo, Kashiwa, Chiba, Japan