How do I identify files adversely affected by the SMAP Level-1B atmospheric correction error?
Due to a problem involving the atmospheric correction algorithm used to process SMAP Level-1B (L1B) brightness temperatures, select half-orbit data files contain invalid brightness temperature values. The errors occur infrequently, about one half orbit per month, and affected files have been (or will be) removed from the following data sets:
SMAP L1B Radiometer Half-Orbit Time-Ordered Brightness Temperatures (SPL1BTB), Version 3
Data Set DOI: http://dx.doi.org/10.5067/YV5VOWY5V446
SMAP L1C Radiometer Half-Orbit 36 km EASE-Grid Brightness Temperatures (SPL1CTB), Version 3
Data Set DOI: http://dx.doi.org/10.5067/E51BSP6V3KP7
SMAP L2 Radiometer Half-Orbit 36 km EASE-Grid Soil Moisture (SPL2SMP), Version 4
Data Set DOI: http://dx.doi.org/10.5067/XPJTJT812XFY
Users of L1B brightness temperature data will be able to identify affected files by looking at the first element in tb_lat, tb_lon, or ta_filtered_3. If the element contains the fill value -9999.00, the brightness temperatures stored in tb_v and tb_h will be invalid. The affected files are also documented in the following spreadsheet.
Users of L1C brightness temperature and L2 soil moisture data will need to identify the affected files based on the filenames or orbit numbers documented in the spreadsheet linked above.
All deleted files will be replaced during the next reprocessing of SMAP data. Registered users will be notified when reprocessing occurs.
If you have any questions, please contact the User Services Office by addressing messages to firstname.lastname@example.org.