Craig S.T. Daughtry, USDA ARS, Hydrology & Remote Sensing Lab, Beltsville, MD, United States, Vern C Vanderbilt, NASA, Moffett Field, CA, United States, Robert P. Dahlgren, California State University Monterey Bay, Seaside, CA, United States and E Raymond Hunt Jr, USDA ARS Hydrology Lab, Beltsville, MD, United States