Erroneous data in the RSS SMAP Version 4.0 salinity processing have appeared for the time period February 4-17, 2020, affecting both L2C files and 8-day L3 files. The reason is a bad HYCOM salinity ancillary file for February 9.
This affects the salinity algorithm, as HYCOM ancillary data is used for the target calibration. A new HYCOM model was obtained and the results were updated. Please download the updated files if you have used RSS SMAP V4.0 data for the following period.
L2C (DOI: 10.5067/SMP40-2SOCS)
L3 8-day (DOI: 10.5067/SMP40-3SPCS)
For a list of specific affected files please see announcement:
https://podaac.jpl.nasa.gov/announcemen ... data_files