The SMAP/In Situ Core Validation Site Land Surface Parameters Match-Up Data, Version 1 data set, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), has been updated with additional core site files that have a temporal coverage of 2015-2020. This data set contains performance assessments of various SMAP soil moisture products.
Data set DOI: https://doi.org/10.5067/DXAVIXLY18KM