SMAP L3 Radiometer Soil Moisture

OpenL3Data productPassive microwaveSoilsHydrology

Daily gridded soil moisture retrievals from the SMAP passive microwave radiometer. The standard grid is 36 km; grid spacing is distinct from the instrument footprint. Earthdata access and quality flags apply.

SMAP

Access

Open data, retrieved directly from the source under its licence.

Access endpoints

https
https://search.earthdata.nasa.gov/
Primary official discovery portal. Search by the collection title or product short name; sign-in and product-specific access requirements may apply.
https
https://nsidc.org/data/spl3smp/versions/9
Catalog entry reviewed 2026-09-29; start denotes catalog inclusion, not archive inception. Nominal scope is not observed coverage. Consult source quality flags, effective periods and access requirements. No live footprint adapter is supplied for this discovery record.
stac-api
https://cmr.earthdata.nasa.gov/stac/NSIDC_CPRD
SPL3SMP_009 · Official NASA Earthdata artifact geometry. Follow pagination for the complete search.

Licence

U.S. Government Public Domain

No restrictions on use; citation requested.

open: trueattribution: falsecommercial use: true

Harmonized Landsat Sentinel-2 (HLS v2)MODIS Terra Daily Surface Reflectance (MOD09GA)VIIRS Black Marble Night Lights (VNP46)FIRMS Active Fire Detections GEDI L2A Elevation and Height Metrics ICESat-2 ATL03 Geolocated Photons

Machine view

{
  "@context": {
    "AcademicProvider": "tf:AcademicProvider",
    "AccessMethod": "tf:AccessMethod",
    "Agent": "tf:Agent",
    "AgentAction": "tf:AgentAction",
    "AirbornePlatform": "tf:AirbornePlatform",
    "ApprovalAction": "tf:ApprovalAction",
    "AreaOfInterest": "tf:AreaOfInterest",
    "Asset": "tf:Asset",
    "AvailabilityEvent": "tf:AvailabilityEvent",
    "C2System": "tf:C2System",
    "Collection": "tf:Collection",
    "CollectionRequirement": "tf:CollectionRequirement",
    "CommercialLicense": "tf:CommercialLicense",
    "CommercialProvider": "tf:CommercialProvider",
    "Constellation": "tf:Constellation",
    "CoverageAssessment": "tf:CoverageAssessment",
    "DataCategory": "tf:DataCategory",
    "DataFormat": "tf:DataFormat",
    "DataProductCollection": "tf:DataProductCollection",
    "DataTier": "tf:DataTier",
    "Delivery": "tf:Delivery",
    "GovernmentAgency": "tf:GovernmentAgency",
    "Instrument": "tf:Instrument",
    "Item": "tf:Item",
    "License": "tf:License",
    "LicenseTier": "tf:LicenseTier",
    "Modality": "tf:Modality",
    "Offer": "tf:Offer",
    "OpenLicense": "tf:OpenLicense",
    "Order": "tf:Order",
    "OrderAction": "tf:OrderAction",
    "Place": "tf:Place",
    "Platform": "tf:Platform",
    "PreprocessedCollection": "tf:PreprocessedCollection",
    "PricingModel": "tf:PricingModel",
    "Principal": "tf:Principal",
    "Priority": "tf:Priority",
    "ProcessingLevel": "tf:ProcessingLevel",
    "Provider": "tf:Provider",
    "Quote": "tf:Quote",
    "QuoteAction": "tf:QuoteAction",
    "RawDataCollection": "tf:RawDataCollection",
    "ReleasabilityMarking": "tf:ReleasabilityMarking",
    "RestrictedLicense": "tf:RestrictedLicense",
    "Satellite": "tf:Satellite",
    "SearchAction": "tf:SearchAction",
    "SpaceAgency": "tf:SpaceAgency",
    "SpatialExtent": "tf:SpatialExtent",
    "SpectralBand": "tf:SpectralBand",
    "SpendingMandate": "tf:SpendingMandate",
    "StreetAddress": "tf:StreetAddress",
    "TaskAction": "tf:TaskAction",
    "TaskingRequest": "tf:TaskingRequest",
    "TemporalExtent": "tf:TemporalExtent",
    "Tool": "tf:Tool",
    "about": {
      "@id": "tf:about",
      "@type": "@id"
    },
    "accessClass": {
      "@id": "tf:accessClass",
      "@type": "xsd:string"
    },
    "accessKind": {
      "@id": "tf:accessKind",
      "@type": "xsd:string"
    },
    "accessibleVia": {
      "@id": "tf:accessibleVia",
      "@type": "@id"
    },
    "acquiredAt": {
      "@id": "tf:acquiredAt",
      "@type": "xsd:dateTime"
    },
    "actsOn": {
      "@id": "tf:actsOn",
      "@type": "@id"
    },
    "addresses": {
      "@id": "tf:addresses",
      "@type": "@id"
    },
    "allWeather": {
      "@id": "tf:allWeather",
      "@type": "xsd:boolean"
    },
    "aoi": {
      "@id": "tf:aoi",
      "@type": "@id"
    },
    "approvedBy": {
      "@id": "tf:approvedBy",
      "@type": "@id"
    },
    "archiveUsdPerKm2": {
      "@id": "tf:archiveUsdPerKm2",
      "@type": "xsd:decimal"
    },
    "areaKm2": {
      "@id": "tf:areaKm2",
      "@type": "xsd:decimal"
    },
    "asWKT": {
      "@id": "tf:asWKT",
      "@type": "geo:wktLiteral"
    },
    "bandCount": {
      "@id": "tf:bandCount",
      "@type": "xsd:integer"
    },
    "bbox": {
      "@id": "tf:bbox",
      "@type": "xsd:string"
    },
    "cloudCover": {
      "@id": "tf:cloudCover",
      "@type": "xsd:decimal"
    },
    "country": {
      "@id": "tf:country",
      "@type": "xsd:string"
    },
    "dataCategory": {
      "@id": "tf:dataCategory",
      "@type": "@id"
    },
    "dataTier": {
      "@id": "tf:dataTier",
      "@type": "@id"
    },
    "dcat": "http://www.w3.org/ns/dcat#",
    "dct": "http://purl.org/dc/terms/",
    "derivedFrom": {
      "@id": "tf:derivedFrom",
      "@type": "@id"
    },
    "description": "dct:description",
    "endDate": {
      "@id": "tf:endDate",
      "@type": "xsd:date"
    },
    "endpointURL": {
      "@id": "tf:endpointURL",
      "@type": "xsd:anyURI"
    },
    "format": {
      "@id": "tf:format",
      "@type": "@id"
    },
    "fulfils": {
      "@id": "tf:fulfils",
      "@type": "@id"
    },
    "geo": "http://www.opengis.net/ont/geosparql#",
    "governedBy": {
      "@id": "tf:governedBy",
      "@type": "@id"
    },
    "gsdMeters": {
      "@id": "tf:gsdMeters",
      "@type": "xsd:decimal"
    },
    "hasAsset": {
      "@id": "tf:hasAsset",
      "@type": "@id"
    },
    "hasDelivery": {
      "@id": "tf:hasDelivery",
      "@type": "@id"
    },
    "hasInstrument": {
      "@id": "tf:hasInstrument",
      "@type": "@id"
    },
    "hasItem": {
      "@id": "tf:hasItem",
      "@type": "@id"
    },
    "hasModality": {
      "@id": "tf:hasModality",
      "@type": "@id"
    },
    "hasOffer": {
      "@id": "tf:hasOffer",
      "@type": "@id"
    },
    "hasPlatform": {
      "@id": "tf:hasPlatform",
      "@type": "@id"
    },
    "hosts": {
      "@id": "tf:hosts",
      "@type": "@id"
    },
    "httpMethod": "schema:httpMethod",
    "id": "@id",
    "identifier": "dct:identifier",
    "inCollection": {
      "@id": "tf:inCollection",
      "@type": "@id"
    },
    "invokesTool": {
      "@id": "tf:invokesTool",
      "@type": "@id"
    },
    "isOpen": {
      "@id": "tf:isOpen",
      "@type": "xsd:boolean"
    },
    "keyword": "dcat:keyword",
    "label": "rdfs:label",
    "latencyHours": {
      "@id": "tf:latencyHours",
      "@type": "xsd:decimal"
    },
    "license": {
      "@id": "tf:license",
      "@type": "@id"
    },
    "licenseTier": {
      "@id": "tf:licenseTier",
      "@type": "@id"
    },
    "maxOrderUsd": {
      "@id": "tf:maxOrderUsd",
      "@type": "xsd:decimal"
    },
    "minimumAreaKm2": {
      "@id": "tf:minimumAreaKm2",
      "@type": "xsd:decimal"
    },
    "multiplier": {
      "@id": "tf:multiplier",
      "@type": "xsd:decimal"
    },
    "name": "schema:name",
    "nightCapable": {
      "@id": "tf:nightCapable",
      "@type": "xsd:boolean"
    },
    "odrl": "http://www.w3.org/ns/odrl/2/",
    "offNadirDeg": {
      "@id": "tf:offNadirDeg",
      "@type": "xsd:decimal"
    },
    "onBehalfOf": {
      "@id": "tf:onBehalfOf",
      "@type": "@id"
    },
    "operatedBy": {
      "@id": "tf:operatedBy",
      "@type": "@id"
    },
    "owl": "http://www.w3.org/2002/07/owl#",
    "placedBy": {
      "@id": "tf:placedBy",
      "@type": "@id"
    },
    "polarization": {
      "@id": "tf:polarization",
      "@type": "xsd:string"
    },
    "potentialAction": "schema:potentialAction",
    "priceCurrency": "schema:priceCurrency",
    "pricingModel": {
      "@id": "tf:pricingModel",
      "@type": "@id"
    },
    "priority": {
      "@id": "tf:priority",
      "@type": "@id"
    },
    "processingLevel": {
      "@id": "tf:processingLevel",
      "@type": "@id"
    },
    "prov": "http://www.w3.org/ns/prov#",
    "providedBy": {
      "@id": "tf:providedBy",
      "@type": "@id"
    },
    "quotesCollection": {
      "@id": "tf:quotesCollection",
      "@type": "@id"
    },
    "rdf": "http://www.w3.org/1999/02/22-rdf-syntax-ns#",
    "rdfs": "http://www.w3.org/2000/01/rdf-schema#",
    "releasability": {
      "@id": "tf:releasability",
      "@type": "@id"
    },
    "revisitHours": {
      "@id": "tf:revisitHours",
      "@type": "xsd:decimal"
    },
    "sarBand": {
      "@id": "tf:sarBand",
      "@type": "xsd:string"
    },
    "satisfiedBy": {
      "@id": "tf:satisfiedBy",
      "@type": "@id"
    },
    "schema": "https://schema.org/",
    "skos": "http://www.w3.org/2004/02/skos/core#",
    "sosa": "http://www.w3.org/ns/sosa/",
    "spatialExtent": {
      "@id": "tf:spatialExtent",
      "@type": "@id"
    },
    "spectralRange": {
      "@id": "tf:spectralRange",
      "@type": "xsd:string"
    },
    "ssn": "http://www.w3.org/ns/ssn/",
    "startDate": {
      "@id": "tf:startDate",
      "@type": "xsd:date"
    },
    "status": {
      "@id": "tf:status",
      "@type": "xsd:string"
    },
    "subscriptionUsdPerMonth": {
      "@id": "tf:subscriptionUsdPerMonth",
      "@type": "xsd:decimal"
    },
    "target": "schema:target",
    "taskable": {
      "@id": "tf:taskable",
      "@type": "xsd:boolean"
    },
    "taskingUsdPerKm2": {
      "@id": "tf:taskingUsdPerKm2",
      "@type": "xsd:decimal"
    },
    "temporalExtent": {
      "@id": "tf:temporalExtent",
      "@type": "@id"
    },
    "tf": "https://terrafabric.world/ont#",
    "tfr": "https://terrafabric.world/id/",
    "title": "dct:title",
    "toolName": {
      "@id": "tf:toolName",
      "@type": "xsd:string"
    },
    "totalUsd": {
      "@id": "tf:totalUsd",
      "@type": "xsd:decimal"
    },
    "type": "@type",
    "url": "schema:url",
    "urlTemplate": "schema:urlTemplate",
    "validUntil": {
      "@id": "tf:validUntil",
      "@type": "xsd:dateTime"
    },
    "windowHours": {
      "@id": "tf:windowHours",
      "@type": "xsd:decimal"
    },
    "xsd": "http://www.w3.org/2001/XMLSchema#"
  },
  "accessClass": "free",
  "accessibleVia": [
    {
      "accessKind": "https",
      "endpointURL": "https://search.earthdata.nasa.gov/",
      "type": "AccessMethod"
    },
    {
      "accessKind": "https",
      "endpointURL": "https://nsidc.org/data/spl3smp/versions/9",
      "type": "AccessMethod"
    },
    {
      "accessKind": "stac-api",
      "endpointURL": "https://cmr.earthdata.nasa.gov/stac/NSIDC_CPRD",
      "type": "AccessMethod"
    }
  ],
  "allWeather": false,
  "dataTier": "tf:tier-product",
  "description": "Daily gridded soil moisture retrievals from the SMAP passive microwave radiometer. The standard grid is 36 km; grid spacing is distinct from the instrument footprint. Earthdata access and quality flags apply.",
  "format": [
    {
      "id": "https://terrafabric.world/id/format/hdf5",
      "label": "HDF5"
    }
  ],
  "hasInstrument": [
    {
      "id": "https://terrafabric.world/id/instrument/l-band-passive-microwave-radiometer",
      "label": "L-band passive microwave radiometer"
    }
  ],
  "hasModality": [
    "tf:modality-microwave",
    "tf:modality-soil",
    "tf:modality-hydrology"
  ],
  "hasPlatform": [
    {
      "id": "https://terrafabric.world/id/platform/smap",
      "label": "SMAP"
    }
  ],
  "id": "https://terrafabric.world/id/collection/nasa-smap-soil-moisture",
  "identifier": "nasa-smap-soil-moisture",
  "keyword": [
    "earth-observation",
    "land",
    "soil-moisture"
  ],
  "license": "https://terrafabric.world/id/license/us-public-domain",
  "nightCapable": false,
  "potentialAction": [
    {
      "@type": [
        "SearchAction",
        "schema:SearchAction"
      ],
      "name": "search_items",
      "target": {
        "@type": "schema:EntryPoint",
        "httpMethod": "GET",
        "urlTemplate": "https://terrafabric.world/api/v1/collections/nasa-smap-soil-moisture/items?bbox={bbox}&datetime={datetime}"
      }
    },
    {
      "@type": "QuoteAction",
      "name": "get_quote",
      "target": {
        "@type": "schema:EntryPoint",
        "contentType": "application/json",
        "httpMethod": "POST",
        "urlTemplate": "https://terrafabric.world/api/v1/quotes"
      }
    }
  ],
  "processingLevel": "tf:level-L3",
  "providedBy": {
    "id": "https://terrafabric.world/id/provider/nasa",
    "label": "NASA Earthdata",
    "url": "https://search.earthdata.nasa.gov/"
  },
  "spatialExtent": {
    "asWKT": "POLYGON((-180 -90,180 -90,180 90,-180 90,-180 -90))",
    "bbox": "-180,-90,180,90",
    "type": "SpatialExtent"
  },
  "taskable": false,
  "temporalExtent": {
    "startDate": "2026-09-29",
    "type": "TemporalExtent"
  },
  "title": "SMAP L3 Radiometer Soil Moisture",
  "type": [
    "DataProductCollection",
    "dcat:Dataset"
  ]
}

SMAP L3 Radiometer Soil Moisture

Access

Access endpoints

Licence

Related

Machine view