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JPL SMAP Level 2B CAP Sea Surface Salinity V5.0 Validated Dataset. DOI: https://doi.org/10.5067/SMP50-2TOCS

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JPL SMAP Level 2B CAP Sea Surface Salinity V4.0 Validated Dataset

(SMAP_JPL_L2B_SSS_CAP_V4)
1 Publication Cited this Dataset
Citation metrics available for years (2014-2022)
DOI10.5067/SMP40-2TOCS
Short NameSMAP_JPL_L2B_SSS_CAP_V4
DescriptionThis is the PI-produced JPL SMAP-SSS V4.0, Level 2B CAP, validated sea surface salinity and extreme winds orbital/swath product from the NASA Soil Moisture Active Passive (SMAP) observatory. It is based on the Combined Active-Passive (CAP) retrieval algorithm developed at JPL originally in the context of Aquarius/SAC-D and now extended to SMAP. The JPL SMAP-SSS L2B CAP product includes data for a range of parameters: derived SMAP sea surface salinity (SSS) and wind speed/direction data for extreme winds, brightness temperatures for each radiometer polarization, ancillary reference surface salinity, wind and wave height data, 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 3 day latency in processing and availability. Observations are global in extent and provided at 25km swath grid with an approximate spatial resolution of 60 km. Improvement with htis V4.0 dataset include: addition of estimated SSS uncertainty, improvement of TB correction for high latitudes, modification of the land correction range to 1000 km from coast, change of the ancillary wind source from NCEP GDAS to NCEP GFS resulting in significant improvements in SSS retrievals near sotrms, extension of the range of SSS retrievals to 45 PSU, and SSS retrievals also for large inland seas. 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 day, 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 sansor providing complementary active and passive sensing capabilities. Malfunction of the SMAP scatterometer on July 7, 2015, has necessitated the use of collocated wind speed for the surface roughness correction required for the surface salinity retrieval.
Version4.0
Dataset TypeDEPRECATED
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Please contact podaac@podaac.jpl.nasa.gov for more info.
Citation is critically important for dataset documentation and discovery. Please cite the data as follows, and cite the reference papers when it is appropriate.
Citation JPL Climate Oceans and Solid Earth group. 2018. JPL CAP SMAP Sea Surface Salinity Products. Ver. 4.0. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/SMP40-2TOCS

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For more information see Data Citations and Acknowledgments.
Journal Reference Fore,A.G, S.H. Yueh, W. Tang, B.W. Stiles, and A.K. Hayashi (2016). Combined Active/Passive Retrievals of Ocean Vector Wind and Sea Surface Salinity With SMAP. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 54, NO. 12. p.7396-7404. DOI: 10.1109/TGRS.2016.2601486

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