SMAP L4 Global 3-hourly 9 km EASE-Grid Surface and Root Zone Soil Moisture Geophysical Data 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	March 27, 2025, 14:19 (UTC)
Created	February 19, 2025, 11:02 (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 Geophysical Data 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/EVKPQZ4AFC4D.
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=-194,-71,146,86&l=SMAP_L4_Snow_Mass,Coastlines_15m,MODIS_Terra_CorrectedReflectance_TrueColor&t=2015-03-31
harvest_object_id	d2a31fea-1a31-471f-bfb2-d53ef659c287
harvest_source_id	b37e5849-07d2-41cd-8bb6-c6e83fc98f2d
harvest_source_title	DNG Legacy Data
identifier	C2938665761-NSIDC_CPRD
issued	2015-03-31
landingPage	https://doi.org/10.5067/EVKPQZ4AFC4D
language	{en-US}
metadata_type	geospatial
modified	2025-03-16
programCode	{026:001}
publisher	NASA NSIDC DAAC
resource-type	Dataset
source_datajson_identifier	true
source_hash	14e3a6d925b8129a3c02c6f71b3c0caf5a9252399d4a434548204652aedd2c35
source_schema_version	1.1
spatial	-180.0 -85.044 180.0 85.044
temporal	2015-03-31T00:00:00Z/2025-03-17T00:00:00Z
theme	{geospatial}