SM_D2018287_Map_SATSSS_data_1day_800.png

Data are available through the following servers:

Service Resource Locator
HTTPS

Near real time search tool for daily, global data

https://coastwatch.noaa.gov/cw_html/NearRealTimeSearch.html?region=WW&product=salinity&sensor=MIRAS&daysback=5&desc=sat

HTTPS

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/nc/SM_Dyyyyddd_Map_SATSSS_data_[1day|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).

Example:  

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

THREDDS https://coastwatch.noaa.gov/thredds/socd/coastwatch/catalog_smos.html

Please acknowledge "NOAA CoastWatch/OceanWatch" when you use data from our site and cite the particular dataset DOI as appropriate.

SM_D2018287_Map_SATSSS_data_1day_800.png

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.

KeyDescription
Platform/Sensor

SMOS/Microwave Imaging Radiometer with Aperture Synthesis (MIRAS)

Measurement/Products

Earth Science > Oceans > Surface Salinity

DOI

n/a

Short Name

CoastWatch/OceanWatch binned-SMOS-L3

Sample Filename

Daily: SM_D2018202_Map_SATSSS_data_1day.nc

3 days: SM_D2018199_Map_SATSSS_data_3days.nc

Dataset Type

Open

Processing Level

L3

Spactial Coverage

Global
180W-180E
90N-90S

Temporal Coverage

1 May 2010 - current

Latency

24 hours

Resolution

0.25 x 0.25  longitude/latitude degree

Projection

Geographic

Swath Width

n/a

Sample Frequency

n/a

Temporal Repeat

Daily and 3 days

Orbital Period

23-day repeat cycle, 3-day sub-cycle

Orbit

altitude 763 km, Sun-synchronous, near-polar (6 am/ 6 pm crossing)

Data Provider

Creator: NOAA/STAR/CoastWatch
Release Place: College Park, MD, USA
Release Date: 2018-Jul-25

Formats

PNG, NetCDF

Keywords

SMOS, ESA, MIRAS, satellite sea-surface salinity

Documentation: 
  • V6.62 Release Notes from ESA 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.
  • 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.

(♦ - non-US government website)