1. Physics Department & Centre of Environmental and Marine Studies, University of Aveiro, 3810-193 Aveiro, Portugal
2. Applied Ocean Physics and Engineering Department, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA
3. International Data Centre, Comprehensive Nuclear-Test-Ban Treaty Organization, 1400 Vienna, Austria
4. Laboratory of Robotics and Engineering Systems, University of Algarve, 8005-135 Faro, Portugal, , , ,