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 Levels 1-3 data have been updated: SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures, Version 4 (SPL1BTB) Data Set DOI: https://doi.org/10.5067/VA6W2M0JTK2N SMAP L1C Radiometer Half-Orbit 36 km EASE-Grid Brightness Temperatures, Version 4 (SPL1CTB) Data Set DOI: https://doi.org/10.5067/ZVILG0PS6CTI SMAP Enhanced L1C Radiometer Half-Orbit 9 km EASE-Grid Brightness Temperatures, Version 2 (SPL1CTB_E) Data Set DOI: https://doi.org/10.5067/0DGGEWUC6MLY SMAP L2 Radiometer Half-Orbit 36 km EASE-Grid Soil Moisture, Version 5 (SPL2SMP) Data Set DOI: https://doi.org/10.5067/SODMLCE6LGLL SMAP Enhanced L2 Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture, Version 2 (SPL2SMP_E) Data Set DOI: https://doi.org/10.5067/K4A1SNL5DLON SMAP L3 Radiometer Global Daily 36 km EASE-Grid Soil Moisture, Version 5 (SPL3SMP) Data Set DOI: https://doi.org/10.5067/ZX7YX2Y2LHEB SMAP Enhanced L3 Radiometer Global Daily 9 km EASE-Grid Soil Moisture, Version 2 (SPL3SMP_E) Data Set DOI: https://doi.org/10.5067/RFKIZ5QY5ABN SMAP L3 Radiometer Global and Northern Hemisphere Daily 36 km EASE-Grid Freeze/Thaw State, Version 2 (SPL3FTP) Data Set DOI: https://doi.org/10.5067/YN94K53QM061 SMAP Enhanced L3 Radiometer Global and Northern Hemisphere Daily 9 km EASE-Grid Freeze/Thaw State, Version 2 (SPL3FTP_E) Data Set DOI: https://doi.org/10.5067/1M7OJC7R7VKI Primary changes include:
- Level-1 Brightness Temperatures: Added procedure to correct brightness temperatures for water/land contamination near coastlines
- Level-2 and -3 Soil Moisture: Improved depth correction for effective soil temperature
- Level-3 Freeze/Thaw: Implemented supplementary single-channel V-pol (SCV) algorithm for areas of lower latitudes, extending the spatial coverage to global