1. Research Center for Spatial Information (CEOSpaceTech) and the Department of Telecommunications, University Politehnica of Bucharest, Bucharest, Romania
2. Research Center for Spatial Information (CEOSpaceTech), University Politehnica of Bucharest, Bucharest, Romania
3. Laboratoire d'Ocanographie Physique et Spatiale (LOPS), Plouzané, Ifremer, France