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    • SMAP Enhanced L3 Radiometer Global and Northern Hemisphere Daily 9 km EASE-Grid Freeze/Thaw State V004

    Metadata Updated: January 13, 2025

    This enhanced Level-3 (L3) product provides a daily composite of global and Northern Hemisphere landscape freeze/thaw conditions retrieved by the Soil Moisture Active Passive (SMAP) radiometer from 6:00 a.m. descending and 6:00 p.m. ascending half-orbit passes. This product is derived from SMAP enhanced Level-1C brightness temperatures (SPL1CTB_E). Backus-Gilbert optimal interpolation techniques are used to extract maximum information from SMAP antenna temperatures and convert them to brightness temperatures. The data are then posted to two 9 km Earth-fixed, Equal-Area Scalable Earth Grids, Version 2.0 (EASE-Grid 2.0): a global cylindrical and a Northern Hemisphere azimuthal.

    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.

    Downloads & Resources

    Dates

    Metadata Created Date December 13, 2023
    Metadata Updated Date January 13, 2025

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Graphic Preview

    This application allows you to interactively browse global satellite imagery within hours of it being acquired. You can also save it, share it, and download the underlying data.

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date December 13, 2023
    Metadata Updated Date January 13, 2025
    Publisher NASA NSIDC DAAC
    Maintainer
    Identifier C2776463920-NSIDC_ECS
    Data First Published 2015-03-31
    Language en-US
    Data Last Modified 2025-01-07
    Category 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 SMAP Enhanced L3 Radiometer Global and Northern Hemisphere Daily 9 km EASE-Grid Freeze/Thaw State V004. Version 004. Archived by National Aeronautics and Space Administration, U.S. Government, NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/NQLCDOZJYAKX.
    Graphic Preview Description This application allows you to interactively browse global satellite imagery within hours of it being acquired. You can also save it, share it, and download the underlying data.
    Graphic Preview File https://worldview.earthdata.nasa.gov/?v=-208,-76,149,89&l=SMAP_L3_Passive_Enhanced_Night_Freeze_Thaw(disabled=2),SMAP_L3_Passive_Enhanced_Day_Freeze_Thaw(disabled=2),Coastlines_15m,MODIS_Terra_CorrectedReflectance_TrueColor&t=2015-04-14
    Harvest Object Id 7a9b9c7a-6b0e-4f3f-8205-8fd792d0ea60
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.5067/NQLCDOZJYAKX
    Metadata Type geospatial
    Old Spatial -180.0 -85.044 180.0 85.044
    Program Code 026:001
    Source Datajson Identifier True
    Source Hash c948f2048978903232d018f40f858a268d3c96c950aca6fadaccfe9b3c90172b
    Source Schema Version 1.1
    Spatial
    Temporal 2015-03-31T00:00:00Z/2025-01-13T00:00:00Z

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