Data · dataset · 2025
SMOS-Based SMAP L2 Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture V001
Listed in Open NASA
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: SMOS-Based SMAP L2 Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture (NSIDC-0799): This 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).
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SMAP/SMOS L3 Radiometer 9 km EASE-Grid Soil Moisture (NSIDC-0800): To generate this product, processing software ingests 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
- Google Scholar search results scholar.google.com/scholar?q=10.5067%2FGXBB46ZD0CLE ↗
download · from open nasa gov
- Download this dataset n5eil01u.ecs.nsidc.org/SMAP/NSIDC-0799.001 ↗
download · from open nasa gov
- Download this dataset search.earthdata.nasa.gov/search?q=NSIDC-0799+V001 ↗
download · from open nasa gov
- This dataset's landing page doi.org/10.5067/gxbb46zd0cle ↗
download · from open nasa gov
Where it is published
- Open NASA dataset page data.nasa.gov/dataset/smos-based-smap-l2-radiometer-half-orbit-9-km-ease-gri… ↗
landing page · from open nasa gov
Catalogue records · 1
- CKAN API data.nasa.gov/api/3/action/package_show?id=1de3ac61-a639-4773-9af7-330d96c00… ↗
metadata API · from open nasa gov
Topics
Related
- Possibly the same asSMOS-Based SMAP L2 Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture V001
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| Open NASA | 1de3ac61-a639-4773-9af7-330d96c0037e | 15 h ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| concepts[field].anzsrc:field:400608 | mapping · open nasa gov | vocabulary-mapper@1.0.0 | keywords['microwave'] |
| concepts[field].local:field:earth-environmental | mapping · open nasa gov | connector:open_nasa_gov@1.0.0 | |
| concepts[field].local:field:engineering | mapping · open nasa gov | connector:open_nasa_gov@1.0.0 | |
| created_date | source · open nasa gov | connector:open_nasa_gov@1.0.0 | |
| description | source · open nasa gov | connector:open_nasa_gov@1.0.0 | /notes |
| license_text | source · open nasa gov | connector:open_nasa_gov@1.0.0 | |
| publication_date | source · open nasa gov | connector:open_nasa_gov@1.0.0 | |
| title | source · open nasa gov | connector:open_nasa_gov@1.0.0 | /title |
| updated_date | source · open nasa gov | connector:open_nasa_gov@1.0.0 |