1. a Global Hydrology and Climate Center , Universities Space Research Association, National Aeronautics and Space Administration, Marshall Space Flight Center, National Space Science and Technology Center , Huntsville , AL , USA
2. b Global Hydrology and Climate Center , Earth Science Office, National Aeronautics and Space Administration, Marshall Space Flight Center, National Space Science and Technology Center , Huntsville , AL , USA
3. c Centers for Disease Control and Prevention , National Center for Environmental Health , Atlanta , GA , USA
4. d Center for Health Research/Southeast (Kaiser Permanente) , Atlanta , GA , USA
5. e Northrop Grumman , Atlanta , GA , USA
6. f Fusion Cell, Office of Preparedness and Emergency Operations, Office of the Assistant Secretary for Preparedness and Response, U.S. Department of Health & Human Services , Washington , DC , USA