SMAP L4 Global 3-hourly 9 km EASE-Grid Surface and Root Zone Soil Moisture Analysis Update V007

SMAP Level-4 (L4) surface and root zone soil moisture data are provided in three products:

SMAP L4 Global 3-hourly 9 km EASE-Grid Surface and Root Zone Soil Moisture Geophysical Data (SPL4SMGP, DOI: 10.5067/EVKPQZ4AFC4D) SMAP L4 Global 3-hourly 9 km EASE-Grid Surface and Root Zone Soil Moisture Analysis Update (SPL4SMAU, DOI: 10.5067/LWJ6TF5SZRG3) SMAP L4 Global 9 km EASE-Grid Surface and Root Zone Soil Moisture Land Model Constants (SPL4SMLM, DOI: 10.5067/KN96XNPZM4EG).

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.

Data and Resources

Google Scholar search resultsHTML
Search results for publications that cite this dataset by its DOI.
Explore
- More information
- Go to resource
Download this datasetHTML
Subscribe to have new data automatically sent when the data become available.
Explore
- More information
- Go to resource
Download this datasetHTML
Direct download via HTTPS protocol.
Explore
- More information
- Go to resource
Download this dataset through Earthdata SearchHTML
NASA's newest search and order tool for subsetting, reprojecting, and...
Explore
- More information
- Go to resource
Download this datasetHTML
Search and filter data files using a map-based interface
Explore
- More information
- Go to resource
Get a related visualization through WORLDVIEWHTML
This application allows you to interactively browse global satellite imagery...
Explore
- More information
- Go to resource
View documentation related to this datasetHTML
Includes a user's guide, supplemental documents like ATBDs and academic...
Explore
- More information
- Go to resource

Additional Info

Field	Value
Maintainer	NSIDC Services
Last Updated	March 27, 2025, 14:11 (UTC)
Created	February 19, 2025, 08:02 (UTC)
accessLevel	public
bureauCode	{026:00}
catalog_@context	https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id	https://data.nasa.gov/data.json
catalog_conformsTo	https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy	https://project-open-data.cio.gov/v1.1/schema/catalog.json
citation	SMAP L4 Global 3-hourly 9 km EASE-Grid Surface and Root Zone Soil Moisture Analysis Update V007. Version 007. Archived by National Aeronautics and Space Administration, U.S. Government, NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/LWJ6TF5SZRG3.
graphic-preview-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.
graphic-preview-file	https://worldview.earthdata.nasa.gov/?v=-215.35490720580785,-72.26175513012362,124.98316257744611,94.23627065806534&l=SMAP_L4_Analyzed_Surface_Soil_Moisture,Coastlines_15m,MODIS_Terra_CorrectedReflectance_TrueColor&lg=false&t=2022-04-09-T04%3A00%3A00Z
harvest_object_id	798fc986-69f9-4e82-9a17-5e8ca6a389bc
harvest_source_id	b37e5849-07d2-41cd-8bb6-c6e83fc98f2d
harvest_source_title	DNG Legacy Data
identifier	C2537927247-NSIDC_ECS
issued	2015-03-31
landingPage	https://doi.org/10.5067/LWJ6TF5SZRG3
language	{en-US}
metadata_type	geospatial
modified	2025-03-20
programCode	{026:001}
publisher	NASA NSIDC DAAC
resource-type	Dataset
source_datajson_identifier	true
source_hash	429d408d26eebefd821fe50f4e9698d9599556ea91e2d1b809ec69a2567e0aac
source_schema_version	1.1
spatial	-180.0 -85.044 180.0 85.044
temporal	2015-03-31T00:00:00Z/2025-03-24T00:00:00Z
theme	{geospatial}