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RSS SMAP Level 3 Sea Surface Salinity Standard Mapped Image 8-Day Running Mean V4.0 Validated Dataset

Metadata Updated: December 6, 2023

The version 4.0 SMAP-SSS level 3, 8-Day running mean gridded product is based on the fourth release of the validated standard mapped sea surface salinity (SSS) data from the NASA Soil Moisture Active Passive (SMAP) observatory, produced operationally by Remote Sensing Systems (RSS). Enhancements with this release include: use of an improved 0.125 degree land correction table with land emission based on SMAP TB; replacement of the previous NCEP sea-ice mask with one based on RSS AMSR-2 and implementing a sea-ice threshold of 0.3% (gain weighted sea-ice fraction); revised solar flagging that depends on glint angle and wind speed; inclusion of estimated SSS-uncertainty; consolidation of both 40KM and 70KM SMAP-SSS datasets as variable fields in a single data product. Daily data files for this product are based on SSS averages spanning an 8-day moving time window. SMAP data begins on April 1,2015 and is ongoing. L3 products are global in extent and gridded at 0.25degree x 0.25degree with a default spatial feature resolution of approximately 70KM. Note that while a SSS 40KM variable is also included in the product, for most open ocean applications, the default SSS variable (70KM) is best used as they are significantly less noisy than the 40KM data. The SMAP satellite is in a near-polar orbit at an inclination of 98 degrees and an altitude of 685 km. It has an ascending node time of 6 pm and is sun-synchronous. With its 1000km swath, SMAP achieves global coverage in approximately 3 days, but has an exact orbit repeat cycle of 8 days. On board instruments include a highly sensitive L-band radiometer operating at 1.41GHz and an L-band 1.26GHz radar sensor providing complementary active and passive sensing capabilities. Malfunction of the SMAP scatterometer on 7 July, 2015, has necessitated the use of collocated wind speed, primarily from WindSat, for the surface roughness correction required for the surface salinity retrieval.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Created Date December 1, 2022
Metadata Updated Date December 6, 2023

Metadata Source

Harvested from NASA Data.json

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Additional Metadata

Resource Type Dataset
Metadata Created Date December 1, 2022
Metadata Updated Date December 6, 2023
Publisher NASA/JPL/PODAAC
Maintainer
Identifier C1940468263-POCLOUD
Data First Published 2019-05-07
Language en-US
Data Last Modified 2019-05-07
Category SMAP, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Citation Remote Sensing Systems (RSS). 2019-08-28. RSS SMAP Level 3 Sea Surface Salinity Standard Mapped Image 8-Day Running Mean Validated Dataset. Version 4.0. SMAP Sea Surface Salinity Products. Remote Sensing Systems, 444 Tenth Street, Suite 200, Santa Rosa, CA 95401, USA. Archived by National Aeronautics and Space Administration, U.S. Government, Remote Sensing Systems (RSS). https://doi.org/10.5067/SMP40-3SPCS. http://podaac.jpl.nasa.gov/smap. Remote Sensing Systems (RSS), Remote Sensing Systems (RSS), 2019-08-28, RSS SMAP Level 3 Sea Surface Salinity Standard Mapped Image 8-Day Running Mean V4.0 Validated Dataset, http://podaac.jpl.nasa.gov/smap.
Creator Remote Sensing Systems (RSS)
Graphic Preview Description Thumbnail
Graphic Preview File https://podaac.jpl.nasa.gov/Podaac/thumbnails/SMAP_RSS_L3_SSS_SMI_8DAY-RUNNINGMEAN_V4.jpg
Harvest Object Id 3c222358-8168-4052-9c84-834b1053cb92
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL https://doi.org/10.5067/SMP40-3SPCS
Metadata Type geospatial
Old Spatial -180.0 -90.0 180.0 90.0
Program Code 026:001
Release Place Remote Sensing Systems, 444 Tenth Street, Suite 200, Santa Rosa, CA 95401, USA
Series Name RSS SMAP Level 3 Sea Surface Salinity Standard Mapped Image 8-Day Running Mean Validated Dataset
Source Datajson Identifier True
Source Hash 008ceb7c9100bca943e0fda31dd38788a18b54123f6fd1c4a1aac3aa20d30196
Source Schema Version 1.1
Spatial
Temporal 2015-03-27T12:00:00Z/2023-03-01T00:00:00Z

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