SMOS-Based SMAP L2 Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture V001
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. 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).
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.
Complete Metadata
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|---|---|
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|
| description | 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. 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. <br> The Integrated SMAP and SMOS Soil Moisture Data is available in two products: <ul> <li>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). </li> <li>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. </li> </ul> |
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|
| identifier | C3379565271-NSIDC_ECS |
| issued | 2015-05-01 |
| keyword |
[
"biosphere",
"earth-science",
"land-surface",
"microwave",
"soils",
"spectral-engineering",
"vegetation"
]
|
| landingPage | https://doi.org/10.5067/GXBB46ZD0CLE |
| language |
[
"en-US"
]
|
| modified | 2025-04-01 |
| programCode |
[
"026:001"
]
|
| publisher |
{
"name": "NASA NSIDC DAAC",
"@type": "org:Organization"
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|
| spatial | -180.0 -90.0 180.0 90.0 |
| temporal | 2015-05-01T00:00:00Z/2022-01-01T23:59:59.999Z |
| theme |
[
"geospatial"
]
|
| title | SMOS-Based SMAP L2 Radiometer Half-Orbit 9 km EASE-Grid Soil Moisture V001 |
