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SMAP/CYGNSS EASE-Grid Soil Moisture V001

Published by NASA NSIDC DAAC | National Aeronautics and Space Administration | Catalog Last Checked: September 09, 2026 at 01:14 AM | Dataset Last Updated: March 31, 2025
This data set is derived by downscaling Soil Moisture Active Passive (SMAP) enhanced Level-3 9 km brightness temperatures (TB) using Cyclone Global Navigation Satellite System (CYGNSS) reflectivity data and employing a slightly modified version of the baseline SMAP active-passive TB algorithm, the Single Channel Algorithm – Vertical polarization (SCA-V). The main parameter of this data set is surface soil moisture presented on the Global EASE-Grid 2.0 projection, with each data point representing the top 5 cm of the soil column. For SMAP-derived data, see SMAP Enhanced L3 Radiometer Global and Polar Grid Daily 9 km EASE-Grid Soil Moisture, Version 5; for CYGNSS-derived data, see CYGNSS Level 1, Version 2.1.

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Complete Metadata
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description This data set is derived by downscaling Soil Moisture Active Passive (SMAP) enhanced Level-3 9 km brightness temperatures (TB) using Cyclone Global Navigation Satellite System (CYGNSS) reflectivity data and employing a slightly modified version of the baseline SMAP active-passive TB algorithm, the Single Channel Algorithm – Vertical polarization (SCA-V). The main parameter of this data set is surface soil moisture presented on the Global EASE-Grid 2.0 projection, with each data point representing the top 5 cm of the soil column. For SMAP-derived data, see <a href="https://doi.org/10.5067/4DQ54OUIJ9DL">SMAP Enhanced L3 Radiometer Global and Polar Grid Daily 9 km EASE-Grid Soil Moisture, Version 5</a>; for CYGNSS-derived data, see <a href="https://doi.org/10.5067/CYGNS-L1X21">CYGNSS Level 1, Version 2.1</a>.
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identifier C3286281558-NSIDC_ECS
issued 2017-04-01
keyword 
[
  "earth-science",
  "land-surface",
  "microwave",
  "soils",
  "spectral-engineering"
]
landingPage https://doi.org/10.5067/8OODMTVR6RT9
language 
[
  "en-US"
]
modified 2025-03-31
programCode 
[
  "026:001"
]
publisher 
{
  "name": "NASA NSIDC DAAC",
  "@type": "org:Organization"
}
spatial -180.0 -40.0 180.0 40.0
temporal 2017-04-01T00:00:00Z/2023-12-31T23:59:59.999Z
theme 
[
  "geospatial"
]
title SMAP/CYGNSS EASE-Grid Soil Moisture V001

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