Valentina Raimondi, ‘Nello Carrara’ Institute of Applied Physics – National Research Council, Italy; Maria Paola Bracciale, Maria Carla Ciacchella, ‘Sapienza’ University of Rome, Italy; Alessandra Ciapponi, Paolo Corradi, European Space Agency, Netherlands; Robin de Vries, The Ocean Cleanup, Netherlands; Paolo Di Maggio, Andrea Gonnelli, Donatella Guzzi, Cinzia Lastri, Vanni Nardino, Lorenzo Palombi, ‘Nello Carrara’ Institute of Applied Physics – National Research Council, Italy; Maria Laura Santarelli, ‘Sapienza’ University of Rome, Italy