Comparison Between SMOS, VUA, ASCAT, and ECMWF Soil Moisture Products Over Four Watersheds in U.S. - Delphine J. Leroux; Yann H. Kerr; Ahmad Al Bitar; Rajat Bindlish; Thomas J. Jackson; Béatrice Berthelot; Gautier Portet (IEEE Trans. Geosci. Remote. Sens., 2014)