Array · collection · 2026
SMOS-Based SMAP L2 Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture V002
Listed in NASA Earthdata CMR
The Soil Moisture Active Passive (SMAP, launched in 2015) and the Soil Moisture and Ocean Salinity (SMOS, launched in 2009) missions are each L-band satellites that provide brightness temperature and soil moisture estimates and vegetation optical depth approximately every 2-3 days with a spatial resolution of ~40 km.
Description
By integrating brightness temperature observations from both satellites, these data products reduce the revisit time to about one day, improving the ability to monitor fast-response processes such as groundwater drainage and recharge, early dry-down after storms, and pre-storm soil moisture conditions for runoff determination.
The Integrated SMAP and SMOS Soil Moisture Data is available in two products. The SMOS-Based SMAP L2 Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture (NSIDC-0799) product is generated by processing half-orbit granules (either 6 AM ascending or 6 PM descending) from the pre-processed SMOS product. The L2 product consists solely of SMOS-based data, incorporating information after SMOS brightness temperatures (TBs) at a 40° incidence angle were inter-calibrated and the soil moisture (SM) and vegetation optical depth (VOD) were retrieved using the SMAP Dual Channel Algorithm (DCA).
Read the rest (1 more)
The SMAP/SMOS L3 Radiometer 9 km EASE-Grid Soil Moisture (NSIDC-0800) product is generated by the processing software ingesting one day’s worth of granules from both the SMAP SPL2SMP_E product and the SMOS-derived L2 data. The L3 product contains both SMAP and SMOS descending (6:00 AM/PM) and ascending (6:00 PM/AM) data stored in separate arrays.
Links
Get the data
- search.earthdata.nasa.gov /search/granules?p=C4242728400-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
- cmr.earthdata.nasa.gov /virtual-directory/collections/C4242728400-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
- 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/NSIDC-0799/versions/2 ↗
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/ot7m8vaiglie ↗
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/multi_nsidc-0800-v002… ↗
Integrated SMAP and SMOS Soil Moisture Data Products, Version 2 User Guide
documentation · from NASA CMR
- nsidc.org /sites/default/files/documents/technical-reference/l2l3_sm_p_e_… ↗
Integrated SMAP and SMOS Soil Moisture Data, Version 2 ATBD
documentation · from NASA CMR
Catalogue records · 2
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C4242728400-NSIDC_CPRD.umm_json ↗
metadata API · from NASA CMR
- CMR record cmr.earthdata.nasa.gov/search/concepts/C4242728400-NSIDC_CPRD.html ↗
catalogue entry · from NASA CMR
Topics
Provenance · 1 source records, 15 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C4242728400-NSIDC_CPRD | 8 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[instrument].gcmd_instrument:smap-l-band-radiometer | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[instrument].gcmd_instrument:smos-l-band-radiometer | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/biosphere/vegetation/vegetation-optical-depth | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/land-surface/soils/soil-moisture-water-content/surface-soil-moisture | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/spectral-engineering/microwave/brightness-temperature | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:smap | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:smos | 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 |