1. IIHR-Hydroscience and Engineering; University of Iowa; Iowa City Iowa USA
2. Hydrology and Remote Sensing Laboratory; ARS, USDA; Beltsville Maryland USA
3. Department of Civil and Environmental Engineering; Massachusetts Institute of Technology; Cambridge Massachusetts USA
4. Department of Agronomy; Iowa State University; Ames Iowa USA
5. Center for Research on Environment and Water; George Mason University; Calverton Maryland USA
6. Nicholas School of the Environment and Earth Sciences; Duke University; Durham North Carolina USA
7. Department of Soil Science; University of Wisconsin; Madison Wisconsin USA
8. NASA Goddard Space Flight Center; Greenbelt Maryland USA
9. Department of Civil and Environmental Engineering; Princeton University; Princeton New Jersey USA