Do we need a spatially and temporally variable observation error?
Iliana E Mladenova, NASA GSFC, Greenbelt, MD, United States, John D Bolten, NASA Goddard Space Flight Center, Greenbelt, United States, Wade T Crow, USDA ARS, Hydrology and Remote Sensing Lab, Beltsville, MD, United States, Richard A.M. de Jeu, Transmissivity B.V., Noordwijk, Netherlands, Michael H Cosh, U.S. Department of Agriculture ARS, Hydrology and Remote Sensing Laboratory, Beltsville, United States and Jeffrey P Walker, Monash University, Department of Civil Engineering, Clayton, VIC, Australia
