SMAP_JPL_L2B_SSS_CAP_V3_1

PODAAC-SMP30-2TOCS

Version 1
  • Abstract
    This is the PI-produced JPL SMAP-SSS, level 2B CAP, validated sea surface salinity 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 L2C CAP product includes data for a range of parameters: derived SMAP sea surface salinity (SSS) and wind speed/direction data, 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 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 for the surface roughness correction required for the surface salinity retrieval.

Data Identification Fields:

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    Data Dates
    Creation
    Last Revision
    Processing Level

    2B

    Quality
    Collection Progress

    Not Provided

Related URLs
    Science Keywords
    • Earth Science
    • Oceans
    • Salinity/Density
    • Salinity
    • Salinity

Acquisition Information Fields:

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Platforms
  • null
    SMAP
    Instruments
    • SMAP_RADIOMETER

Temporal Information Fields:

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Spatial Information Fields:

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    Coverage Type Zone Identifier Geometry Granule Representation
    HORIZONTAL CARTESIAN CARTESIAN
Location Keywords
    • GEOGRAPHIC REGION
    • GLOBAL

Data Centers

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  • Jet Propulsion Laboratory (JPL) Climate Oceans and Solid Earth group
    PROCESSOR

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  • PO.DAAC
    ARCHIVER

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  • Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, N
    ARCHIVER
    Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA

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Data Contacts

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  • User
    Technical Contact
    User Services

    Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, N

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Collection Citations Fields:

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