Metadata Updated: March 23, 2019

The version 2.0 SMAP-SSS, level 2C product contains the first release of the validated sea surface salinity orbital/swath data from the NASA Soil Moisture Active Passive (SMAP) observatory, and is produced operationally by Remote Sensing Systems (RSS). This release builds upon the legacy of the Aquarius/SAC mission and the official NASA salinity retrieval algorithm which is now applied to observations from the SMAP mission. The SMAP-SSS L2C product includes data for a range of parameters: derived sea surface salinity (SSS), brightness temperatures for each radiometer polarization, antenna temperatures, collocated wind speed, data and ancillary reference surface salinity data from HYCOM, rain rate, quality flags, and navigation data. Each data file covers one 98-minute orbit (15 files per day). Data begins on April 1,2015 and is ongoing, with a one-month latency in processing and availability. Observations are global in extent and provided at a 0.25 degree x 0.25 degree grid with an approximate spatial resolution of 40 km.

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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Metadata Created Date August 1, 2018
Metadata Updated Date March 23, 2019

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date March 23, 2019
Publisher PO.DAAC
Unique Identifier C1344050004-PODAAC
User Services
Maintainer Email
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 Archived by National Aeronautics and Space Administration, U.S. Government, PO.DAAC.
Datagov Dedupe Retained 20190322235447
Harvest Object Id 159ec908-6602-41aa-8919-5a5e9ae6d462
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2016-10-22
Homepage URL https://cmr.earthdata.nasa.gov:443/search/concepts/C1344050004-PODAAC.html
Language en-US
Metadata Type geospatial
Data Last Modified 2016-10-22
Program Code 026:001
Source Datajson Identifier True
Source Hash d177870f8f617836d83634c8f35f190668d497e2
Source Schema Version 1.1
Spatial -180.0 -90.0 180.0 90.0
Temporal 2015-04-01T00:43:12Z/2019-02-25T00:00:00Z
Category geospatial

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