SMAP Enhanced L2 Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture V006

This enhanced Level-2 (L2) product contains calibrated, geolocated, brightness temperatures acquired by the Soil Moisture Active Passive (SMAP) radiometer during 6:00 a.m. descending and 6:00 p.m. ascending half-orbit passes. This product is derived from SMAP Level-1B (L1B) interpolated antenna temperatures. Backus-Gilbert optimal interpolation techniques are used to extract maximum 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 [available as the SPl1CTB_E product]. As of 2021, the data are also posted to the Northern Hemisphere EASE-Grid 2.0, an azimuthal equal-area projection. These 9-km brightness temperatures are then used to retrieve surface soil moisture posted on the 9-km grid [this SPL2SMP_E product].

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Additional Info

Field	Value
Maintainer	NSIDC Services
Last Updated	March 27, 2025, 13:51 (UTC)
Created	February 19, 2025, 00:35 (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 L2 Radiometer Half-Orbit 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/BN36FXOMMC4C.
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=-203,-77,152,87&l=SMAP_L2_Passive_Enhanced_Night_Soil_Moisture_Option3,SMAP_L2_Passive_Enhanced_Night_Soil_Moisture_Option2,SMAP_L2_Passive_Enhanced_Night_Soil_Moisture_Option1,SMAP_L2_Passive_Enhanced_Day_Soil_Moisture_Option3,SMAP_L2_Passive_Enhanced_Day_Soil_Moisture_Option2,SMAP_L2_Passive_Enhanced_Day_Soil_Moisture_Option1,Coastlines_15m,MODIS_Terra_CorrectedReflectance_TrueColor
harvest_object_id	ee05170b-b213-4110-bfa6-bafcf929c2d4
harvest_source_id	b37e5849-07d2-41cd-8bb6-c6e83fc98f2d
harvest_source_title	DNG Legacy Data
identifier	C2938663676-NSIDC_CPRD
issued	2015-03-31
landingPage	https://doi.org/10.5067/BN36FXOMMC4C
language	{en-US}
metadata_type	geospatial
modified	2025-03-16
programCode	{026:001}
publisher	NASA NSIDC DAAC
resource-type	Dataset
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spatial	-180.0 -85.044 180.0 90.0
temporal	2015-03-31T00:00:00Z/2025-03-17T00:00:00Z
theme	{geospatial}