1. Global Modeling and Assimilation Office National Aeronautics and Space Administration, Goddard Space Flight Center Greenbelt MD USA
2. Earth System Science Interdisciplinary Center University of Maryland College Park MD USA
3. Geodesy and Geophysics Laboratory National Aeronautics and Space Administration, Goddard Space Flight Center Greenbelt MD USA
4. Cryospheric Science Laboratory National Aeronautics and Space Administration, Goddard Space Flight Center Greenbelt MD USA
5. Science Systems and Applications, Inc. Glenn Dale MD USA
6. Universities Space Research Association, Goddard Earth Sciences Technology and Research Columbia MD USA
7. Joint Center for Earth Systems Technology University of Maryland, Baltimore County Baltimore MD USA