Daniele Ciani¹, Marie-Helene Rio², Helene Etienne³, Yannice Faugere⁴, Stephanie Guinehut⁵, Elodie Charles⁶, Bruno Buongiorno Nardelli⁷, Salvatore Marullo⁸, Vittorio Brando¹ and Rosalia Santoleri⁹, (1)CNR Institute of Marine Sciences, Rome, Italy, (2)European Space Research Institute, Frascati, Italy, (3)CLS Collecte Localisation Satellites, Ramonville Saint Agne, France, (4)Collecte Localisation Satellites, Ramonville Saint-Agne, France, (5)Collecte Localisation Satellites (CLS), Ramonville Saint‑Agne, France, (6)CLS Collecte Localisation Satellites, Plouzané, France, (7)CNR Institute of Marine Sciences, Naples, Italy, (8)ENEA National Agency for New Technologies, Energy and Sustainable Economic Development, Rome, Italy, (9)CNR Institute for Marine Science, Rome, Italy