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    "fn": "NSIDC Services",
    "hasEmail": "mailto:nsidc@nsidc.org"
  },
  "description": "This enhanced Level-3 (L3) soil moisture product provides a composite of daily estimates of global land surface conditions retrieved by the Soil Moisture Active Passive (SMAP) radiometer. This product is a daily composite of SMAP Level-2 (L2) soil moisture which is derived from SMAP Level-1C (L1C) interpolated brightness temperatures. Backus-Gilbert optimal interpolation techniques are used to extract 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. As of 2021, the data are also posted to the Northern Hemisphere EASE-Grid 2.0, an azimuthal equal-area projection.",
  "distribution": [
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      "description": "Direct download via HTTPS protocol.",
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      "title": "Download this dataset"
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      "description": "Includes a user's guide, supplemental documents like ATBDs and academic papers, How Tos, FAQs, etc.",
      "downloadURL": "https://doi.org/10.5067/M20OXIZHY3RJ",
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      "format": "HTML",
      "mediaType": "text/html",
      "title": "Download this dataset through Earthdata Search"
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      "downloadURL": "https://nsidc.org/data/data-access-tool/SPL3SMP_E/versions/6/",
      "format": "HTML",
      "mediaType": "text/html",
      "title": "Download this dataset"
    },
    {
      "@type": "dcat:Distribution",
      "description": "Search results for publications that cite this dataset by its DOI.",
      "downloadURL": "https://scholar.google.com/scholar?q=10.5067%2FM20OXIZHY3RJ",
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      "mediaType": "text/html",
      "title": "Google Scholar search results"
    },
    {
      "@type": "dcat:Distribution",
      "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.",
      "downloadURL": "https://worldview.earthdata.nasa.gov/?v=-196%2C-79%2C132%2C72&l=SMAP_L3_Passive_Enhanced_Night_Soil_Moisture%2CSMAP_L3_Passive_Enhanced_Day_Soil_Moisture%2CCoastlines_15m%2CMODIS_Terra_CorrectedReflectance_TrueColor&t=2015-03-31",
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  ],
  "identifier": "C2776463943-NSIDC_ECS",
  "issued": "2015-03-31",
  "keyword": [
    "earth-science",
    "land-surface",
    "microwave",
    "soils",
    "spectral-engineering"
  ],
  "landingPage": "https://doi.org/10.5067/M20OXIZHY3RJ",
  "language": [
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  "modified": "2025-07-17",
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    "name": "NASA NSIDC DAAC"
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  "spatial": "-180.0 -85.044 180.0 90.0",
  "temporal": "2015-03-31T00:00:00Z/2025-03-24T00:00:00Z",
  "theme": [
    "geospatial"
  ],
  "title": "SMAP Enhanced L3 Radiometer Global and Polar Grid Daily 9 km EASE-Grid Soil Moisture V006"
}