Spatial Downscaling of SMAP Soil Moisture Using MODIS Land Surface Temperature and NDVI During SMAPVEX15. - Colliander, Andreas; Fisher, Joshua B.; Halverson, Gregory; Merlin, Olivier; Misra, Sidharth; Bindlish, Rajat; Jackson, Thomas J.; Yueh, Simon (IEEE Geosci. Remote. Sens. Lett., 2017)