SMEX03 QuikSCAT Backscatter Data for Soil Moisture

NASA's SMEX03 dataset contains microwave radiance and radar backscatter measurements from the QuikSCAT/SeaWinds satellite instrument. The data was collected during the 2003 Soil Moisture Experiment across agricultural regions in Alabama, Georgia, and Oklahoma, USA. This experiment aimed to validate satellite-derived soil moisture estimates.

Use Cases

• Validating satellite-derived soil moisture estimates against ground measurements.
• Analyzing radar backscatter coefficients to understand surface roughness and vegetation water content.
• Calibrating microwave remote sensing models for agricultural land cover.
• Studying the relationship between microwave radiance and soil hydrology in varied climates.

Strengths

• Data originates from NASA, a leading authority in earth observation.
• Covers three distinct agricultural regions (Alabama, Georgia, Oklahoma) for comparative analysis.
• Focuses on a controlled field experiment (SMEX03) designed for satellite validation.

Limitations

• Critical technical details like row count, column names, and file size are unavailable from all sources.
• Sources conflict on last update date: Data.gov lists 2026-03-12, while NASA Earthdata lists 2003-08 31, suggesting potential metadata errors.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Collected via the QuikSCAT/SeaWinds satellite instrument during the Soil Moisture Experiment 2003 (SMEX03).

Time Range

2003

Freshness

2003-08-31 23:59:59.999000

Geography

SMEX03 areas in Alabama, Georgia, and Oklahoma, USA.