Quality Monitoring on Level-2 Sea Surface Salinity (SSS) Products from SMAP, SMOS and Aquarius Missions
The data quality monitoring systems (DQMS) for NASA's Soil Moisture Active Passive (SMAP), ESA's Soil Moisture Ocean Salinity (SMOS) and NASA's Aquarius satellites Level-2 products has been developed by the National Centers for Environmental Information (NCEI) Satellite Oceanography team. The DQMS calculates quality assurance (QA) descriptive statistics (including observation number, minimum, maximum, mean, and standard deviation) for selected parameters as new data files are received. Statistics are calculated for each orbit of the SMOS and Aquarius satellites. The DQMS also generates 1.0 degree gridded level-3 SSS data based on box averages with land/ice mask and quality flag filters at monthly and 3-day temporal resolution for SMOS and monthly and 7-day for Aquarius data, including the Combined Active-Passive (CAP) algorithm data. The NCEI-binned level-3 data are saved in netCDF files compliant with the Climate and Forecast (CF) metadata conventions.
Access NODC-binned Level-3 SSS Data
*For access to NCEI-binned Level-3 SMAP SSS data, please contact NCEI.firstname.lastname@example.org. Currently, the data are processed daily within 24 hours latency and we are still working on putting them on the data servers.
Data Quality Monitoring
The following figures present QA descriptive statistics of sea surface salinity in each SMOS and Aquarius level-2 granule (orbit data file) after the quality and land/ice mask flags have been applied. The statistics include total valid observation number, minimum, maximum, mean, standard deviation and total number over 3-sigma edited.