1. Laboratory for Earth Observations and Analyses, ENEA, Rome, Italy
2. Department of Information Engineering, Electronics and Telecommunications, La Sapienza University of Rome, Rome, Italy
3. Institute of Marine Sciences, National Research Council, Rome, Italy
4. Laboratory for Earth Observations and Analyses, ENEA, Palermo, Italy
5. Laboratory for Earth Observations and Analyses, ENEA, Lampedusa, Italy
6. Laboratory for Earth Observations and Analyses, ENEA, Frascati, Italy