SMAP radiometer and radar soil moisture data products are matched with in situ-based soil moisture estimates from core validation sites to produce this data set. These data provide performance assessments of various SMAP soil moisture products. The dataset's cross-platform presence on Data.gov and NASA EarthData indicates its established role in satellite validation.
Use Cases
- Assessing the accuracy of SMAP radiometer soil moisture products against ground measurements.
- Evaluating the performance of SMAP radar soil moisture products using in situ data.
- Calibrating soil moisture retrieval algorithms based on core validation site match-ups.
Strengths
- Produced by the National Aeronautics and Space Administration (NASA), indicating authoritative origin.
- Designed for direct performance assessment of specific SMAP data products.
Limitations
- Critical metadata is missing: column names, row count, file size, and license are unknown.
- Conflicting last updated dates exist between sources (2026-03-13 on Data.gov vs. 2021-03-31 on NASA EarthData).
- Documentation appears limited, with only HTML format listed and no detailed schema.
Provenance
- Source
- National Aeronautics and Space Administration
- Collection Method
- SMAP satellite data matched with in situ estimates from core validation sites.
- Time Range
- null
- Freshness
- 2026-03 13 20:37:04.880402 (Data.gov)
- Geography
- Core validation sites (specific locations not detailed).