Array · collection · 2023
SMAP Enhanced L3 Radiometer Global and Northern Hemisphere Daily 9 km EASE-Grid Freeze/Thaw State V004
Listed in NASA Earthdata CMR
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.
Description
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.
Links
Get the data
- cmr.earthdata.nasa.gov /virtual-directory/collections/C2938664439-NSIDC_CPRD ↗
Quickly download a few files using a web browser, or access data through a command-line utility such as WGET.
download · from NASA CMR
- search.earthdata.nasa.gov /search/granules?p=C2938664439-NSIDC_CPRD ↗
Search and order NASA Earth Science data using spatial and temporal filters. Reformatting, reprojecting, and subsetting options are available for some data sets.
download · from NASA CMR
- earthaccess.readthedocs.io /en/stable ↗
A Python library to search and access NASA Earth science data with just a few lines of code
download · from NASA CMR
- nsidc.org /data/data-access-tool/SPL3FTP_E/versions/4 ↗
Search data by spatial and/or temporal ranges or file name. Choose from various download options, including a Python script.
download · from NASA CMR
Where it is published
- DOI doi.org/10.5067/nqlcdozjyakx ↗
Provides access to data, documentation, tools, citation information, support, and other resources.
landing page · documentation · DOI / persistent id · from NASA CMR
Documentation and papers
- nsidc.org /sites/default/files/documents/user-guide/spl3ftp_e-v004-usergu… ↗
SMAP Enhanced L3 Radiometer Global and Northern Hemisphere Daily 9 km EASE-Grid Freeze/Thaw State, Version 4 User Guide
documentation · from NASA CMR
- SPL3FTP/_E Assessment Report Version 3 [2020] nsidc.org/sites/default/files/smap20l3_ft_p5be5d20assessment20report2020… ↗
documentation · from NASA CMR
- SPL3FTP_E Product Specification Document [2018] nsidc.org/sites/default/files/d-56294_smap20l3_ft_p_e20psd_05312018.pdf ↗
documentation · from NASA CMR
- worldview.earthdata.nasa.gov /?v=-208%2C-76%2C149%2C89&l=SMAP_L3_Passive_Enhanced_Night_Free… ↗
Interactively browse and download global satellite imagery within hours of acquisition.
preview image · from NASA CMR
Catalogue records · 2
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C2938664439-NSIDC_CPRD.umm_json ↗
metadata API · from NASA CMR
- CMR record cmr.earthdata.nasa.gov/search/concepts/C2938664439-NSIDC_CPRD.html ↗
catalogue entry · from NASA CMR
Topics
- Stated by source
- SMAP L-Band Radiometer · Soil Moisture Active and Passive Observatory · Transition Direction
- Inferred from text
- Climate change science 69%
Provenance · 1 source records, 12 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C2938664439-NSIDC_CPRD | 14 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].anzsrc:group:3702 | enrichment · NASA CMR | taxonomy-embedding@1.1.0 | title+keywords+description (69%) |
| concepts[instrument].gcmd_instrument:smap-l-band-radiometer | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/cryosphere/snow-ice/freeze-thaw/transition-direction | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:smap | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| created_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| publication_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |