SMAP Enhanced L3 Radiometer Global and Polar Grid Daily 9 km EASE-Grid Soil Moisture V006

This enhanced Level-3 (L3) soil moisture product provides a composite of daily estimates of global land surface conditions retrieved by the Soil Moisture Active Passive (SMAP) radiometer. This product is a daily composite of SMAP Level-2 (L2) soil moisture which is derived from SMAP Level-1C (L1C) interpolated brightness temperatures. Backus-Gilbert optimal interpolation techniques are used to extract information from SMAP antenna temperatures and convert them to brightness temperatures, which are posted to the 9 km Equal-Area Scalable Earth Grid, Version 2.0 (EASE-Grid 2.0) in a global cylindrical projection. As of 2021, the data are also posted to the Northern Hemisphere EASE-Grid 2.0, an azimuthal equal-area projection.

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Additional Info

Field	Value
Maintainer	NSIDC Services
Last Updated	July 17, 2025, 15:11 (UTC)
Created	March 31, 2025, 17:06 (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 Enhanced L3 Radiometer Global and Polar Grid Daily 9 km EASE-Grid Soil Moisture V006. Version 006. 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/M20OXIZHY3RJ.
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=-196,-79,132,72&l=SMAP_L3_Passive_Enhanced_Night_Soil_Moisture,SMAP_L3_Passive_Enhanced_Day_Soil_Moisture,Coastlines_15m,MODIS_Terra_CorrectedReflectance_TrueColor&t=2015-03-31
harvest_object_id	9c6926d8-8f19-41de-917f-63ccf8d2e32a
harvest_source_id	61638e72-b36c-4866-9d28-551a3062f158
harvest_source_title	DNG Legacy Data
identifier	C2776463943-NSIDC_ECS
issued	2015-03-31
landingPage	https://doi.org/10.5067/M20OXIZHY3RJ
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	5807b257430f02202177afc105b03e675edacda4da82be603683d98c985a1e0b
source_schema_version	1.1
spatial	-180.0 -85.044 180.0 90.0
temporal	2015-03-31T00:00:00Z/2025-03-24T00:00:00Z
theme	{geospatial}