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Dates of Images:<\/strong><\/p>

September 22, 2026<\/span><\/p>

Date of Next Image:<\/strong><\/p>

Unknown<\/span><\/p>

Summary:<\/strong><\/p>

SMAP Level-4 (L4) surface and root zone soil moisture (L4_SM) data are provided in three products. The SMAP L4 Global 3-hourly 9 km EASE-Grid Surface and Root Zone Soil Moisture Geophysical Data (SPL4SMGP, DOI: 10.5067/T5RUATAQREF8) product is a series of 3-hourly time average geophysical land surface fields that are output by the L4_SM algorithm. It is likely of primary interest to most users. The SMAP L4 Global 3-hourly 9 km EASE-Grid Surface and Root Zone Soil Moisture Analysis Update (SPL4SMAU, DOI: 10.5067/02LGW4DGJYRX) product provides diagnostics from the land surface analysis updates. It consists of a series of 3-hourly instantaneous (or snapshot) files that contain the assimilated SMAP observations, the corresponding land model predictions and analysis estimates, and additional data assimilation diagnostics. Lastly, the SMAP L4 Global 9 km EASE-Grid Surface and Root Zone Soil Moisture Land Model Constants (SPL4SMLM, DOI: 10.5067/PXQIBL2ALDZD) product provides static (time-invariant) land surface model constants that will be needed by some users for further interpretation of the geophysical land surface fields. This product consists of only one granule (file) per L4_SM data product version (as defined by a distinct Science Version ID). For each product, SMAP L-band brightness temperature data from descending and ascending half-orbit satellite passes (approximately 6:00 a.m. and 6:00 p.m. local solar time, respectively) are assimilated into a land surface model that is gridded using an Earth-fixed, global cylindrical 9 km Equal-Area Scalable Earth Grid, Version 2.0 (EASE-Grid 2.0) projection.<\/span><\/p>

Parameter(s):<\/i><\/p>

ROOT ZONE SOIL MOISTURE<\/span><\/p>

SURFACE SOIL MOISTURE<\/span><\/p>

Platform(s):<\/strong><\/p>

GEOS-5SMAP<\/span><\/p>

Sensor(s):<\/strong><\/p>

NOT APPLICABLE (root zone)<\/span><\/p>

SMAP L-BAND RADIOMETER (surface soil moisture)<\/span><\/p>

Data Format(s):<\/span><\/p>

GeoTIFF<\/span><\/p>

Temporal Resolution:<\/strong><\/p>

3 hour<\/span><\/p>

Spatial Resolution:<\/strong><\/p>

9 km<\/span><\/p>

Spatial Reference System(s):<\/strong><\/p>

WGS 84 / NSIDC EASE-Grid 2.0 Global<\/span><\/p>

EPSG:6933<\/span><\/p>

Credits:<\/strong><\/span><\/p>

Funding was provided by the NASA SMAP Mission. Computational resources were provided by the NASA High-End Computing program through the NASA Center for Climate Simulation. The generation and dissemination of SMAP data products possible includes staff at GSFC, JPL, and NSIDC.<\/span><\/p><\/div><\/div><\/div>", "pixelType": "F32", "meanPixelSize": 8889.3083805098868, "exportTilesAllowed": false, "editFieldsInfo": null, "rasterTypeInfos": [{ "help": "", "name": "Raster Dataset", "description": "Supports all ArcGIS Raster Datasets" }], "defaultResamplingMethod": "Bilinear", "itemAccess": false, "minScale": 0, "serviceProperties": "NorthWest<\/MosaicMethod>First<\/MosaicOperator>true<\/SortAscending><\/LockImageID>Name<\/TileOrderField>0<\/TileOrderBase>600.000000<\/AvgImageSpacingX>300.000000<\/AvgImageSpacingY>0.0<\/ViewPointX>0.0<\/ViewPointY>0.0<\/ViewPointDefShiftX>0.0<\/ViewPointDefShiftY>None<\/CompressionMethod>75<\/CompressionQuality>0.010000<\/CompressionTolerance>Bilinear<\/SamplingMethod><\/ImageServiceProperties><\/ImageServer>", "advancedQueryCapabilities": { "supportsStatistics": true, "supportsSqlExpression": true, "supportsOrderBy": true, "useStandardizedQueries": true, "supportsPagination": true, "supportsDistinct": true }, "serviceItemId": "6653758c36164234b86a1ced5c8181cf", "capabilities": "Image,Metadata,Catalog,Mensuration", "maxScale": 0, "stdvValues": [], "allowedFields": "Name,MinPS,MaxPS,LowPS,HighPS,Tag,GroupName,ProductName,CenterX,CenterY,ZOrder,Shape_Length,Shape_Area,Date", "minPixelSize": 0, "sortAscending": true, "maxMosaicImageCount": 20, "inspectionCapabilities": "", "maxPixelSize": 0, "uncompressedSize": 81432512, "serviceDescription": "

Dates of Images:<\/SPAN><\/P>

September 22, 2026<\/SPAN><\/P>

Date of Next Image:<\/SPAN><\/P>

Unknown<\/SPAN><\/P>

Summary:<\/SPAN><\/P>

SMAP Level-4 (L4) surface and root zone soil moisture (L4_SM) data are provided in three products. The SMAP L4 Global 3-hourly 9 km EASE-Grid Surface and Root Zone Soil Moisture Geophysical Data (SPL4SMGP, DOI: 10.5067/T5RUATAQREF8) product is a series of 3-hourly time average geophysical land surface fields that are output by the L4_SM algorithm. It is likely of primary interest to most users. The SMAP L4 Global 3-hourly 9 km EASE-Grid Surface and Root Zone Soil Moisture Analysis Update (SPL4SMAU, DOI: 10.5067/02LGW4DGJYRX) product provides diagnostics from the land surface analysis updates. It consists of a series of 3-hourly instantaneous (or snapshot) files that contain the assimilated SMAP observations, the corresponding land model predictions and analysis estimates, and additional data assimilation diagnostics. Lastly, the SMAP L4 Global 9 km EASE-Grid Surface and Root Zone Soil Moisture Land Model Constants (SPL4SMLM, DOI: 10.5067/PXQIBL2ALDZD) product provides static (time-invariant) land surface model constants that will be needed by some users for further interpretation of the geophysical land surface fields. This product consists of only one granule (file) per L4_SM data product version (as defined by a distinct Science Version ID). For each product, SMAP L-band brightness temperature data from descending and ascending half-orbit satellite passes (approximately 6:00 a.m. and 6:00 p.m. local solar time, respectively) are assimilated into a land surface model that is gridded using an Earth-fixed, global cylindrical 9 km Equal-Area Scalable Earth Grid, Version 2.0 (EASE-Grid 2.0) projection.<\/SPAN><\/P>

Parameter(s):<\/SPAN><\/P>

ROOT ZONE SOIL MOISTURE<\/SPAN><\/P>

SURFACE SOIL MOISTURE<\/SPAN><\/P>

Platform(s):<\/SPAN><\/P>

GEOS-5SMAP<\/SPAN><\/P>

Sensor(s):<\/SPAN><\/P>

NOT APPLICABLE (root zone)<\/SPAN><\/P>

SMAP L-BAND RADIOMETER (surface soil moisture)<\/SPAN><\/P>

Data Format(s):<\/SPAN><\/P>

GeoTIFF<\/SPAN><\/P>

Temporal Resolution:<\/SPAN><\/P>

3 hour<\/SPAN><\/P>

Spatial Resolution:<\/SPAN><\/P>

9 km<\/SPAN><\/P>

Spatial Reference System(s):<\/SPAN><\/P>

WGS 84 / NSIDC EASE-Grid 2.0 Global<\/SPAN><\/P>

EPSG:6933<\/SPAN><\/P><\/DIV><\/DIV><\/DIV>", "allowCopy": true, "copyrightText": "Funding was provided by the NASA SMAP Mission. Computational resources were provided by the NASA High-End Computing program through the NASA Center for Climate Simulation. The generation and dissemination of SMAP data products possible includes staff at GSFC, JPL, and NSIDC.", "mensurationCapabilities": "Basic", "ownershipBasedAccessControlForRasters": null }