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    • SMAP Enhanced L2 Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture V006

    Metadata Updated: August 22, 2025

    This enhanced Level-2 (L2) product contains calibrated, 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 maximum information from SMAP antenna temperatures and convert them to brightness temperatures, which are posted to the 9 km Equal-Area Scalable Earth Grid, Version 2.0 (EASE-Grid 2.0) in a global cylindrical projection [available as the SPl1CTB_E product]. As of 2021, the data are also posted to the Northern Hemisphere EASE-Grid 2.0, an azimuthal equal-area projection. These 9-km brightness temperatures are then used to retrieve surface soil moisture posted on the 9-km grid [this SPL2SMP_E product].

    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 August 22, 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 August 22, 2025
    Publisher NASA NSIDC DAAC
    Maintainer
    Identifier C2776463773-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 35b9896b-d9ec-40ea-a2d4-1e2e86d06ccd
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.5067/BN36FXOMMC4C
    Metadata Type geospatial
    Old Spatial -180.0 -85.044 180.0 90.0
    Program Code 026:001
    Source Datajson Identifier True
    Source Hash 7aca6b90efb3fde6721c590e7fae1cb84732c42259ee3662c5cedec240c9ed95
    Source Schema Version 1.1
    Spatial
    Temporal 2015-03-31T00:00:00Z/2025-03-24T00:00:00Z

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