1. Department of Ocean, Earth and Atmospheric SciencesOld Dominion University Norfolk VA USA
2. Jet Propulsion LaboratoryCalifornia Institute of Technology Pasadena CA USA
3. Department of OceanographyUniversity of Hawai'i at Mānoa Honolulu HI USA
4. Laboratory for Geodesy and Geophysics, NASA Goddard Space Flight Center Greenbelt MD USA