1. Department of MathematicsUniversity of Oslo Norway
2. Department of Signal Theory and CommunicationsUniversity of Alcalá Spain
3. Centre for Ocean Engineering Science and TechnologySwinburne University of TechnologyMelbourne Australia
4. Now at DNV GL Strategic Research and InnovationHøvik Norway
5. Météo‐France, Département Marine et OcéanographieToulouse France
6. Deceased April 5th, 2014