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CoastWatch/OceanWatch produces 0.25-degree longitude/latitude Level-3 gridded sea-surface salinity (SSS) daily mean dataset by box averaging Soil Moisture Active Passive (SMAP) satellite observations over the global ocean.
Data Access
| Data Tool Links | Data Portal: Daily (1 day): |
| HTTPS | https://www.star.nesdis.noaa.gov/data/socd1/coastwatch/products/smap/nc/
For direct download of daily composites, use this link and complete the pattern for with daily composite filename: https://www.star.nesdis.noaa.gov/data/socd1/coastwatch/products/miras/nc/SM_Dyyyyddd_Map_SATSSS_data_#day.nc where yyyy = Year , ddd=day of year, # = 1 or 8. SMAP daily files are available from the beginning of 2015 to present. Composites (8 day) are available beginning January 2017. For example: |
| THREDDS | Top Level: https://www.star.nesdis.noaa.gov/thredds/socd/coastwatch/catalog_smos_smap.html SMAP Aggregated: https://www.star.nesdis.noaa.gov/thredds/socd/coastwatch/catalog_smap_aggregated.html SMAP Per-file: https://www.star.nesdis.noaa.gov/thredds/catalog/SMAP/catalog.html |
Product Overview
CoastWatch/OceanWatch produces 0.25-degree longitude/latitude Level-3 gridded sea-surface salinity (SSS) daily mean dataset by box averaging Soil Moisture Active Passive (SMAP) satellite observations over the global ocean. Daily files are available back to the beginning of 2015. An eight day mean composite (8 day running mean) is also generated daily. The 8 day composite is available from January 2017.
CoastWatch/OceanWatch Level-3 SSS products are generated directly from the NASA Jet Propulsion Laboratory (JPL) SMAP Level-2B SSS Near Real-time CAP Sea Surface Salinity V5.0 swath HDF5 files. These products improve the application of satellite SSS products in NOAA by minimizing the data latency to within 24 hours of Level-2 data availability.
Product Details
Less than 24 hours
30 km nominal sensor resolution
CoastWatch Level-3 product is gridded to 0.25º (~25 km)
