Evaluation of 18 satellite- and model-based soil moisture products using in situ measurements from 826 sensors - Beck, H. E.; Pan, M.; Miralles, D. G.; Reichle, R. H.; Dorigo, W. A.; Hahn, S.; Sheffield, J.; Karthikeyan, L.; Balsamo, G.; Parinussa, R. M.; van Dijk, A. I. J. M.; Du, J.; et al. (Hydrol. Earth Syst. Sci. Discuss., 2020)