Optimizing the Radiative Transfer Model Using Deep Neural Networks for NISAR Soil Moisture Retrieval. - Xiaodong Huang 004; Lorenzo Giuliano Papale; Marco Lavalle; Fabio Del Frate; Heresh Fattahi; Steven Tsz K. Chan; Rowena B. Lohman; Xiaolan Xu; Yunjin Kim (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2025)