Merging two passive microwave remote sensing (SMOS and AMSR_E) datasets to produce a long term record of Soil Moisture. - Al-Yaari, A.; Wigneron, Jean-Pierre; Ducharne, A.; Kerr, Yann; Rosnay, Patricia de; Jeu, Richard de; Govind, Ajit; Bitar, Ahmad Al; Albergel, Clément; Sabater, Joaquín Muñoz; Richaume, Philippe; Mialon, Arnaud (2014)