UAVSAR Interferometric Water-Level Data for Mississippi River Delta Wetlands

Southern Louisiana's Atchafalaya and Terrebonne Basins are covered by this dataset of UAVSAR Level 2 interferometric products from the 2021 Delta-X campaign. It provides water-level change observations from spring and fall deployments, with measurements taken at 30-minute intervals during flights. The data were collected by a NASA Gulfstream-III aircraft equipped with an L-band synthetic aperture radar.

Use Cases

• Generating time series of water surface elevation changes using interferogram phase and unwrapped phase products.
• Assessing radar coherence over wetland vegetation to study flood dynamics and inundation extent.
• Validating hydrological models by comparing UAVSAR-derived water elevations with in-situ gauge data.
• Analyzing tropospheric delay effects on interferometry using the provided quality assurance masks.
• Mapping spatial patterns of water-level change across flight lines using the included geometry files with latitude, longitude, and incidence angle.

Strengths

• Data quality was assessed by comparing UAVSAR water elevation estimates with in-situ water level gauges throughout the study area.
• Includes multiple derived products: interferogram phase, amplitude, unwrapped phase, coherence, and tropospheric delay masks.
• Covers two distinct seasonal deployments in 2021: spring (March 27 to April 18) and fall (September 3 to September 13).

Limitations

• Exact row count, file size, and specific column names are not provided by any source.
• Sources conflict on the 'last updated' metadata, with dates ranging from 2021-09-13 to 2026-03-13.
• Data is provided in ENVI format, which may require specialized software for analysis.

Provenance

Source

NASA Delta-X campaign, data collected by the UAVSAR instrument on the Gulfstream-III aircraft.

Collection Method

Airborne synthetic aperture radar (SAR) interferometry, with water surface elevations measured on multiple flights at 30-minute intervals.

Time Range

2021-03 27 to 2021-09-13

Freshness

2026-03-13 03:16:35.940841

Geography

Atchafalaya and Terrebonne Basins, Southern Louisiana, USA, within the Mississippi River Delta.