RSS SMAP Level 3 Sea Surface Salinity Standard Mapped Image Monthly V5.0 Validated Dataset

Description

The version 5.0 SMAP-SSS level 3, monthly 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) with a one-month latency. The major changes in Version 5.0 from Version 4 are: (1) the addition of formal uncertainty estimates to all salinity retrieval products. (2) Sea-ice flagging and sea-ice side-lobe correction based on direct ingestion of AMSR-2 brightness temperature (TB) measurements. This is in contrast to Version 4 and earlier versions in which the sea-ice correction was based on an external sea-ice concentration product. The use of AMSR-2 TB measurements in the SMAP Version 5 products allows for salinity retrievals closer to the sea-ice edge and aids in the detection of large icebergs near the Antarctic. Monthly data files for this product are averages over one-month time intervals. SMAP data begins on April 1,2015 and is ongoing, with a one-month latency in processing and availability. L3 products are global in extent with a default spatial resolution of approximately 70KM. The datasets are gridded at 0.25degree x 0.25degree. 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.

Resources

Name Format Description Link
5 https://podaac.jpl.nasa.gov/CitingPODAAC
47 bad_ancillaries.txt http://images.remss.com/figures/missions/smap/bad_ancillaries.txt
33 SMAP_NASA_RSS_Salinity_Release_V5.0.pdf https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/smap/open/docs/V5/SMAP_NASA_RSS_Salinity_Release_V5.0.pdf
5 http://podaac.jpl.nasa.gov/smap
47 bad_orbits.txt http://images.remss.com/figures/missions/smap/bad_orbits.txt
47 README.KnownIssues.txt https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/aquarius/open/README.KnownIssues.txt
5 http://smap.jpl.nasa.gov/
47 README.txt https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/smap/open/L3/RSS/README.txt
5 http://www.remss.com/missions/smap
5 https://cmr.earthdata.nasa.gov/virtual-directory/collections/C2208416221-POCLOUD
5 https://search.earthdata.nasa.gov/search/granules?p=C2208416221-POCLOUD
5 https://github.com/podaac/data-readers
22 SMAP_RSS_L3_SSS_SMI_MONTHLY_V5.jpg https://podaac.jpl.nasa.gov/Podaac/thumbnails/SMAP_RSS_L3_SSS_SMI_MONTHLY_V5.jpg
5 https://podaac.jpl.nasa.gov%2FCitingPODAAC
5 http://images.remss.com%2Ffigures%2Fmissions%2Fsmap%2Fbad_ancillaries.txt
5 http://podaac.jpl.nasa.gov%2Fsmap
5 http://images.remss.com%2Ffigures%2Fmissions%2Fsmap%2Fbad_orbits.txt
5 https://archive.podaac.earthdata.nasa.gov%2Fpodaac-ops-cumulus-docs%2Faquarius%2Fopen%2FREADME.KnownIssues.txt
5 http://smap.jpl.nasa.gov%2F
5 https://archive.podaac.earthdata.nasa.gov%2Fpodaac-ops-cumulus-docs%2Fsmap%2Fopen%2FL3%2FRSS%2FREADME.txt
5 https://archive.podaac.earthdata.nasa.gov%2Fpodaac-ops-cumulus-docs%2Fsmap%2Fopen%2Fdocs%2FV5%2FSMAP_NASA_RSS_Salinity_Release_V5.0.pdf
5 http://www.remss.com%2Fmissions%2Fsmap
5 https://cmr.earthdata.nasa.gov%2Fvirtual-directory%2Fcollections%2FC2208416221-POCLOUD
5 https://search.earthdata.nasa.gov%2Fsearch%2Fgranules%3Fp%3DC2208416221-POCLOUD
5 https://github.com%2Fpodaac%2Fdata-readers
5 https://podaac.jpl.nasa.gov%2FPodaac%2Fthumbnails%2FSMAP_RSS_L3_SSS_SMI_MONTHLY_V5.jpg
21 https://nsidc.org/forms/GGD501_or.html?major_version=1
21 https://doi.org/10.7265/51zk-r767
0 The metadata's original source. https://cmr.earthdata.nasa.gov/search/concepts/C2208416221-POCLOUD.iso19115

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  • earth-science-salinity-density-oceans-salinity-none

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