1. Cooperative Institute for Meteorological Satellite Studies, University of Wisconsin—Madison, Madison, Wisconsin
2. Agricultural Research Services, United States Department of Agriculture, Hydrology and Remote Sensing Laboratory, Beltsville, Maryland
3. Earth System Interdisciplinary Center, University of Maryland, College Park, College Park, Maryland
4. School of Meteorology, and Oklahoma Climatological Survey, University of Oklahoma, Norman, Oklahoma
5. National Drought Mitigation Center, University of Nebraska–Lincoln, Lincoln, Nebraska