The SMAP Science Data System (SDS) has released updated NASA SMAP data products at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). The following NASA SMAP Level 4 data sets have been updated:
- SMAP L4 Global 3-hourly 9 km EASE-Grid Surface and Root Zone Soil Moisture Analysis Update, Version 4 (SPL4SMAU) Data Set DOI: https://doi.org/10.5067/60HB8VIP2T8W
- SMAP L4 Global 3-hourly 9 km EASE-Grid Surface and Root Zone Soil Moisture Geophysical Data, Version 4 (SPL4SMGP) Data Set DOI: https://doi.org/10.5067/KPJNN2GI1DQR
- SMAP L4 Global 9 km EASE-Grid Surface and Root Zone Soil Moisture Land Model Constraints, Version 4 (SPL4SMLM) Data Set DOI: https://doi.org/10.5067/KGLC3UH4TMAQ
- SMAP L4 Global Daily 9 km EASE-Grid Carbon Net Ecosystem Exchange, Version 4 (SPL4CMDL) Data Set DOI: https://doi.org/10.5067/9831N0JGVAF6
Primary changes include:
- SPL4SMAU, SPL4SMGP, & SPL4SMLM: Land surface modeling system improvements. In addition, data is more CF compliant with the addition of x and y coordinate variables as well as an EASE Grid 2.0 projection mapping variable, which improves interoperability with ArcGIS, QGIS, OPeNDAP, and programmatic access.
- SPL4CMDL: Improvements in model inputs and ancillary files resulting in better RMSE, especially for drier sites.