Delta-X: AVIRIS-NG Surface Reflectance for Louisiana Deltas, 2021

2021 airborne imaging spectroscopy data provides Level 2 atmospherically corrected surface reflectance for the Atchafalaya and Terrebonne basins in coastal Louisiana. The dataset includes 56 files specifically capturing the impact of Hurricane Ida, collected from flights between 2021-09-23 and 2021-09-25, supplementing broader spring and fall 2021 campaign deployments. Data from the AVIRIS-NG instrument, with a spectral range of 380-2510 nm and 3.8-5.4 meter spatial resolution, are provided in ENVI format as part of the multisensor Delta-X campaign.

Use Cases

• Mapping wetland vegetation health based on hyperspectral surface reflectance signatures.
• Assessing hurricane-induced land cover change and sediment redistribution in deltaic regions.
• Calibrating and validating satellite-derived surface reflectance products using high-resolution airborne data.
• Monitoring seasonal changes in coastal water quality and submerged aquatic vegetation.

Strengths

• Includes targeted post-event data with 56 files specifically capturing the impact of Hurricane Ida.
• Provides high spectral resolution data with 5-nm sampling across 380-2510 nm wavelength range.
• Represents a coordinated, multisensor airborne campaign (Delta-X) for comprehensive delta study.

Limitations

• Spatial resolution varies between 3.8 and 5.4 meters, which may limit analysis of very fine-scale features.
• Column names and detailed metadata are not provided in the available descriptions.
• Conflicting 'last updated' dates (2026-04-10 on datagov vs. 2021-09-25 on nasa_earthdata) create uncertainty about metadata freshness.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Airborne data collected via the AVIRIS-NG instrument deployed on a Dynamic Aviation King Air B200 platform.

Time Range

2021-03-27 to 2021-09-25

Freshness

Last updated dates conflict: 2026-04-10 (datagov) and 2021-09-25 (nasa_earthdata).

Geography

Atchafalaya and Terrebonne basins on the southern coast of Louisiana, United States.