Catherine C Walker, Woods Hole Oceanographic Institution, Applied Ocean Physics and Engineering, Woods Hole, MA, United States; NASA Goddard Space Flight Center, University of Maryland ESSIC, Greenbelt, MD, United States, Alex S Gardner, NASA Jet Propulsion Laboratory, Pasadena, CA, United States, Tom Neumann, NASA Goddard Space Flight Ctr., Greenbelt, MD, United States, Helen Amanda Fricker, Scripps Institution of Oceanography, La Jolla, CA, United States, Jeremy N Bassis, University of Michigan, Ann Arbor, MI, United States and Fernando S Paolo, Scripps Inst. of Oceanography, La Jolla, CA, United States