SMAPVEX12: UAVSAR Radar Backscatter for Soil Moisture

SMAPVEX12 UAVSAR Incidence-Angle Normalized Backscatter Data V001 contains backscatter measurements from the Uninhabited Aerial Vehicle Synthetic Aperture Radar instrument. The data were collected by NASA as part of the Soil Moisture Active Passive Validation Experiment 2012. It supports the calibration and validation of satellite-based soil moisture retrieval algorithms.

Use Cases

• Validating satellite soil moisture products based on UAVSAR backscatter measurements.
• Modeling radar backscatter response to soil and vegetation conditions.
• Calibrating synthetic aperture radar (SAR) data processing algorithms for incidence-angle normalization.

Strengths

• Data originates from NASA, a leading space agency, indicating institutional credibility.
• Cross-platform presence on Data.gov and NASA EarthData suggests recognized importance for the scientific community.

Limitations

• Critical metadata is missing, including column names, row count, file size, and specific license.
• Sources conflict on the last updated date (2012-07-17 vs. 2026-03-13), creating uncertainty about data currency.
• Documentation appears sparse, with only a high-level description provided across platforms.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Collected by the Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR) instrument.

Time Range

2012 (from SMAPVEX12 campaign name)

Freshness

Last updated dates conflict: 2026-03-13 (Data.gov) and 2012-07-17 (NASA EarthData).