SMAP Enhanced L3 Radiometer Global and Northern Hemisphere Daily 9 km EASE-Grid Freeze/Thaw State V004

This enhanced Level-3 (L3) product provides a daily composite of global and Northern Hemisphere landscape freeze/thaw conditions retrieved by the Soil Moisture Active Passive (SMAP) radiometer from 6:00 a.m. descending and 6:00 p.m. ascending half-orbit passes. This product is derived from SMAP enhanced Level-1C brightness temperatures (SPL1CTB_E). Backus-Gilbert optimal interpolation techniques are used to extract maximum information from SMAP antenna temperatures and convert them to brightness temperatures. The data are then posted to two 9 km Earth-fixed, Equal-Area Scalable Earth Grids, Version 2.0 (EASE-Grid 2.0): a global cylindrical and a Northern Hemisphere azimuthal.

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 dataset through Earthdata SearchHTML
NASA's newest search and order tool for subsetting, reprojecting, and...
Explore
- More information
- Go to resource
Download this datasetHTML
Direct download via HTTPS protocol.
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
This dataset's landing pageHTML
Provides access to data, documentation, tools, citation information, support,...
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 31, 2025, 21:56 (UTC)
Created	March 31, 2025, 21:56 (UTC)
Identifier	C2938664439-NSIDC_CPRD
Issued	2015-03-31
Language	{en-US}
Modified	2025-03-16
Theme	{geospatial}
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 Northern Hemisphere Daily 9 km EASE-Grid Freeze/Thaw State V004. Version 004. 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/NQLCDOZJYAKX.
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=-208,-76,149,89&l=SMAP_L3_Passive_Enhanced_Night_Freeze_Thaw(disabled=2),SMAP_L3_Passive_Enhanced_Day_Freeze_Thaw(disabled=2),Coastlines_15m,MODIS_Terra_CorrectedReflectance_TrueColor&t=2015-04-14
harvest_object_id	8e66097a-f6fd-4a36-a789-2fd4c2777ac9
harvest_source_id	61638e72-b36c-4866-9d28-551a3062f158
harvest_source_title	DNG Legacy Data
landingPage	https://doi.org/10.5067/NQLCDOZJYAKX
metadata_type	geospatial
programCode	{026:001}
publisher	NASA NSIDC DAAC
resource-type	Dataset
source_datajson_identifier	true
source_hash	dea32b6cd67e0a287066002e375acb39b7ada794d8646762c0619f0fe02539ee
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