SMAP L4 Global 9 km EASE-Grid Surface and Root Zone Soil Moisture Land Model Constants 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.

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Additional Info

Field	Value
Maintainer	NSIDC Services
Last Updated	July 17, 2025, 15:41 (UTC)
Created	March 31, 2025, 18:55 (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 9 km EASE-Grid Surface and Root Zone Soil Moisture Land Model Constants 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/KN96XNPZM4EG.
harvest_object_id	bf970d4e-3e09-4342-83a7-a68e00486e14
harvest_source_id	61638e72-b36c-4866-9d28-551a3062f158
harvest_source_title	DNG Legacy Data
identifier	C2537926833-NSIDC_ECS
issued	2015-03-31
landingPage	https://doi.org/10.5067/KN96XNPZM4EG
language	{en-US}
metadata_type	geospatial
modified	2021-01-01
programCode	{026:001}
publisher	NASA NSIDC DAAC
resource-type	Dataset
source_datajson_identifier	true
source_hash	e30f2648ee5a7c65117cbc6acd2f3d9e85be6d0794712c29bec841589b4e64bb
source_schema_version	1.1
spatial	-180.0 -85.044 180.0 85.044
temporal	2015-03-31T00:00:00Z/2023-03-01T00:00:00Z
theme	{geospatial}