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	March 27, 2025, 14:00 (UTC)
Created	February 19, 2025, 03:40 (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	b854fd51-2962-4fb3-99d6-689848080f4a
harvest_source_id	b37e5849-07d2-41cd-8bb6-c6e83fc98f2d
harvest_source_title	DNG Legacy Data
identifier	C2938664763-NSIDC_CPRD
issued	2015-03-31
landingPage	https://doi.org/10.5067/M20OXIZHY3RJ
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	8b308ecd808dcf55de89728f729a21ea747492ab3ebf074c1f07208e8a4e670b
source_schema_version	1.1
spatial	-180.0 -85.044 180.0 90.0
temporal	2015-03-31T00:00:00Z/2025-03-17T00:00:00Z
theme	{geospatial}