Sea Surface Salinity - Near Real Time - MIRAS SMOS

CoastWatch/OceanWatch produces 0.25-degree longitude/latitude Level-3 gridded sea-surface salinity (SSS) daily and 3-day mean datasets by box averaging European Space Agency (ESA) Soil Moisture – Ocean Salinity (SMOS) mission’s Microwave Imaging Radiometer with Aperture Synthesis (MIRAS) satellite observations over the global ocean.

Data Access
HTTPS

https://www.star.nesdis.noaa.gov/data/socd1/coastwatch/products/miras/nc/

 

For direct download of daily or 3-day composites, use this link and complete the pattern for with daily or 3-day composite filename:

https://www.star.nesdis.noaa.gov/data/socd1/coastwatch/products/miras/n…|3days].nc

where yyyy = Year and ddd=day of year, and choose 1day or 3days for composite (also remove brackets and the "|" character from the string).

SMOS files are available from 1 June 2010 to present

Example:  

https://www.star.nesdis.noaa.gov/data/socd1/coastwatch/products/miras/nc/SM_D2018202_Map_SATSSS_data_1day.nc

THREDDS

Top Level: 

 https://www.star.nesdis.noaa.gov/thredds/socd/coastwatch/catalog_smos_smap.html

SMOS Aggregated:  

https://www.star.nesdis.noaa.gov/thredds/socd/coastwatch/catalog_smos_aggregated.html

SMOS Per File:  

https://www.star.nesdis.noaa.gov/thredds/catalog/SMOS/catalog.html

Sea Surface Salinity - Near Real Time - MIRAS SMOS

CoastWatch/OceanWatch produces 0.25-degree longitude/latitude Level-3 gridded sea-surface salinity (SSS) daily and 3-day mean datasets by box averaging European Space Agency (ESA) Soil Moisture – Ocean Salinity (SMOS) mission’s Microwave Imaging Radiometer with Aperture Synthesis (MIRAS) satellite observations over the global ocean.

CoastWatch/OceanWatch Level-3 SSS products are generated directly from the ESA MIRAS SMOS Level-2 swath NetCDF files (currently V6.62; see release "https://earth.esa.int/documents/10174/1854503/SMOS-Level-2-Ocean-Salinity-v662-release-note"). There are two SSS variables in V6.62 L2 NetCDF files, SSS_corr (corrected for land-sea contamination) and SSS_uncorr. The CoastWatch L3 product ingests the SSS_corr  with values between 27 - 40 PSS. 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.

Short Names
CoastWatch/OceanWatch binned-SMOS-L3
Temporal Start Date
May 1, 2010
Product Families
Sea Surface Salinity
Measurements
Sea Surface Salinity
Processing Levels
Level 3
Latency Groups
0 Hours <= 24 Hours (NRT)
Latency Details

24 hours
Spatial Resolution Groups
2km+
Spatial Resolution Details

0.25°
Data Providers
NOAA
NESDIS
STAR
CoastWatch
Spatial Coverage

Global

Description

180W - 180E
90N - 90S

SMOS

Description

The Soil Moisture and Ocean Salinity
Platform Type
Low Earth Orbit Satellite (LEO)
Instruments
MIRAS
Organizations
ESA
Orbital Altitude
763 km
Orbital Inclination
98.42 degrees

MIRAS

Description

Microwave Imaging Radiometer with Aperture Synthesis
Platforms
SMOS
Instrument Types
Imager
Organizations
ESA
  • V6.62 Release Notes from ESA (link is external)contains links to other SMOS SSS product documents (such as ATDB, product specs, etc.)♦
  • Barcelona Expert Center (2016). SMOS-BEC Ocean and Land Products Description. BEC-SMOS-0001-PD,Version 1.5. Technical report, BEC.
  • Reagan, J., T. Boyer, J. Antonov, and M. Zweng (2014), Comparison analysis between Aquarius sea surface salinity and World Ocean Database in situ analyzed sea surface salinity, J. Geophys. Res. Oceans, 119, 8122–8140, doi:10.1002/2014JC009961(link is external)♦.
  • SMOS-BEC Team 2016: SMOS-BEC Ocean and Land Products Description. BEC-SMOS-0001-PD.pdf , version 1.5
  • SMOS Team, 2014: SMOS L2 OS Input/output data definition. SO-TN-ARG-GS-009. Issue 2, Rev 25, 5 September, 2014. ARGANS 

** When you use our data, please reference the product citation (if available) and acknowledge "NOAA CoastWatch" **

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