Multi-Mission Optimally Interpolated Sea Surface Salinity Global Dataset V1
DOI10.5067/SMP10-4U7CS
Short NameOISSS_L4_multimission_7day_v1
DescriptionThis is a level 4 product on a 0.25-degree spatial and 4-day temporal grid. The product is derived from the level 2 swath data of three satellite missions: the Aquarius/SAC-D, Soil Moisture Active Passive (SMAP) and Soil Moisture and Ocean Salinity (SMOS) using Optimal Interpolation (OI) with a 7-day decorrelation time scale. The product offers a continuous record from August 28, 2011 to present by concatenating the measurements from Aquarius (September 2011 - June 2015) and SMAP (April 2015 present). ESAs SMOS data was used to fill the gap in SMAP data between June and July 2019, when the SMAP satellite was in a safe mode. The two-month overlap (April - June 2015) between Aquarius and SMAP was used to ensure consistency and continuity in data record. The product covers the global ocean, including the Arctic and Antarctic in the areas free of sea ice, but does not cover internal seas such as Mediterranean and Baltic Sea. In-situ salinity from Argo floats and moored buoys are used to derive a large-scale bias correction and to ensure consistency and accuracy of the OISSS dataset. This dataset is produced by the International Pacific Research Center (IPRC) of the University of Hawaii at Manoa in collaboration with the Remote Sensing Systems (RSS), Santa Rosa, California. More details can be found in the users guide.
Version1.0
Dataset TypeCOMPLETE
MeasurementOCEANS > SALINITY/DENSITY > SALINITY
Processing Level4
CoverageRegion: GLOBAL
North Bounding Coordinate: 90 degrees
South Bounding Coordinate: -90 degrees
West Bounding Coordinate: -180 degrees
East Bounding Coordinate: 180 degrees
Time Span: 2011-Aug-24 to 2021-Aug-31
Granule Time Span: 2011-Aug-24 to 2021-Mar-16
ResolutionSpatial Resolution: 0.25 degrees (Latitude) x 0.25 degrees (Longitude)
Temporal Resolution: 4 Days
ProjectionProjection Type: Gridded
Ellipsoid: WGS 84
Platform/Sensor
SMAP
Platform
Name: NASA Soil Moisture Active Passive (SMAP) (SMAP)
Orbit Period: 98.5 minutes
Inclination Angle: 98.0 degrees
/
SMAP L-BAND RADIOMETER
SENSOR
Name: SMAP L-Band Radiometer (SMAP L-BAND RADIOMETER)
Swath Width: 1000.0 kilometers
Description: Spacecraft angular distance from orbital plane relative to the Equator.

Aquarius_SAC-D
Platform
Name: Aquarius SAC-D (Aquarius_SAC-D)
Orbit Period: 98.0 minutes
Inclination Angle: 98.0 degrees
/
AQUARIUS_SCATTEROMETER
SENSOR
Name: Aquarius Scatterometer (AQUARIUS_SCATTEROMETER)
Swath Width: 390.0 kilometers
Description: Spacecraft angular distance from orbital plane relative to the Equator.

SMOS
Platform
Name: Soil Moisture and Ocean Salinity (Earth Explorer Opportunity Mission) (SMOS)
Orbit Period: 100.02 minutes
Inclination Angle: 98.44 degrees
/
SMAP L-BAND RADIOMETER
SENSOR
Name: SMAP L-Band Radiometer (SMAP L-BAND RADIOMETER)
Swath Width: 1000.0 kilometers
Description: Spacecraft angular distance from orbital plane relative to the Equator.

ProjectSoil Moisture Active Passive (SMAP)
Data ProviderPublisher: PODAAC
Creator: Oleg Melnichenko
Release Place: IPRC/SOEST University of Hawaii, Manoa
Release Date: 2021-Jun-30
Resource: http://apdrc.soest.hawaii.edu/datadoc/oisss.php

Keyword(s)Sea Surface Salinity, SSS, Aquarius, SMAP, SMOS, Optimum Interpolation, OISSS
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
GENERAL DOCUMENTATION
USER'S GUIDE
DATA CITATION POLICY
Citation Oleg Melnichenko. 2021. Multi-mission L4 Optimally Interpoated Sea Surface Salinity. Ver. 1.0. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/SMP10-4U7CS

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For more information see Data Citations and Acknowledgments.

Journal Reference Melnichenko, O., P. Hacker., N. Maximenko, G. Lagerloef, and J. Potemra (2016), Optimal interpolation of Aquarius sea surface salinity, J. Geophys. Res. Oceans, 121, 602-616, doi:10.1002/2015JC011343

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