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    • SMAP Enhanced L1C Radiometer Half-Orbit 9 km EASE-Grid Brightness Temperatures V004

    Metadata Updated: October 30, 2025

    This enhanced Level-1C (L1C) product contains calibrated and geolocated brightness temperatures acquired by the Soil Moisture Active Passive (SMAP) radiometer during 6:00 a.m. descending and 6:00 p.m. ascending half-orbit passes. This product is derived from SMAP Level-1B (L1B) interpolated antenna temperatures. Backus-Gilbert optimal interpolation techniques are used to extract enhanced information from SMAP antenna temperatures before they are converted to brightness temperatures. The resulting brightness temperatures are posted to an Earth-fixed, 9 km Equal-Area Scalable Earth Grid, Version 2.0 (EASE-Grid 2.0) in three projections: global cylindrical, Northern Hemisphere azimuthal, and Southern 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 October 30, 2025

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date December 13, 2023
    Metadata Updated Date October 30, 2025
    Publisher NASA NSIDC DAAC
    Maintainer
    Identifier C2776463717-NSIDC_ECS
    Data First Published 2015-03-31
    Language en-US
    Data Last Modified 2025-07-17
    Category geospatial
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 4ccc4677-da72-4970-b35c-6178b7962cae
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.5067/99LHDR3NUM47
    Metadata Type geospatial
    Old Spatial -180.0 -85.044 180.0 85.044
    Program Code 026:001
    Source Datajson Identifier True
    Source Hash d22cfdaccc7e98ef8546ad58e60aa90436ddb03437f6dfad2fa017cb0440c31f
    Source Schema Version 1.1
    Spatial
    Temporal 2015-03-31T00:00:00Z/2025-03-24T00:00:00Z

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