Panagiotis Kossieris, Ioannis Tsoukalas, National Technical University of Athens, Greece; Luca Brocca, National Research Council - Research Institute for Geo-Hydrological Protection, Italy; Hamidreza Mosaffa, Research Institute for Geo-Hydrological Protection, Italy; Christos Makropoulos, National Technical University of Athens, Greece; Anca Anghelea, European Space Agency, Italy