Adriana M Santos Ferreira¹, José C. B. da Silva², Renato Mendes^3,4 and Joao Tasso Borges de Sousa¹, (1)University of Porto, LSTS, Department of Electrical and Computer Engineering, School of Engineering (FEUP), Porto, Portugal, (2)University of Porto, Department of Geosciences, Environment and Spatial Planning (DGAOT) & CIIMAR – Interdisciplinary Centre of Marine and Environmental Research, Porto, Portugal, (3)Universidade do Porto, CIIMAR (Interdisciplinary Centre of Marine and Environmental Research), Porto, Portugal, (4)University of Aveiro, CESAM (Centre for Environmental and Marine Studies), Aveiro, Portugal