UAVSAR L1B Interferometric Products for Delta-X Wetland Campaign

NASA's UAVSAR L1B interferometric products were collected during the 2021 Delta-X campaign over the Atchafalaya Basin in Louisiana. The dataset includes co-registered VV-polarization interferograms, interferometric amplitude, wrapped and unwrapped phase, coherence, and geometry files for Spring and Fall deployments. Data are provided in non-georeferenced ENVI format for analyzing water-level changes in coastal wetlands.

Use Cases

• Generating time series of water levels in wetlands using unwrapped interferometric phase products.
• Assessing floodplain inundation dynamics through interferometric coherence and amplitude data.
• Validating hydrological models by comparing radar-derived water elevation estimates with in-situ gauge data.
• Analyzing land surface deformation and water-level changes using nearest-neighbor (NN, NN+1, NN+2) interferograms.

Strengths

• Data quality was assessed by comparing water elevation estimates with in situ water level gauges throughout the study area.
• Includes multiple co-registered interferogram products (NN, NN+1, NN+2) for temporal analysis across two deployment seasons.
• Contains ancillary geometry files with latitude, longitude, height, and incidence angle information for each flight line.

Limitations

• Data are provided in non-georeferenced ENVI file format, requiring additional processing for geospatial analysis.
• Conflicting last updated dates exist across platforms: datagov lists 2026-03-13, while nasa_earthdata lists 2021-09-13.
• Specific row counts, file sizes, and detailed column specifications are not provided by any source.

Provenance

Source

National Aeronautics and Space Administration (NASA), UAVSAR processing team.

Collection Method

Collected by the UAVSAR polarimetric L-band synthetic aperture radar flown on a NASA Gulfstream-III aircraft; processed using ISCE, SNAPHU, and custom Python code.

Time Range

2021-03 27 to 2021-04-18 (Spring) and 2021-09-03 to 2021-09-13 (Fall).

Freshness

2026-03-13 03:16:39.254389

Geography

Atchafalaya Basin, Southern Louisiana, USA, within the Mississippi River Delta (MRD) floodplain.