ORNL DAAC Data Release - AVUELO AVIRIS-3 Orthocorrected Surface Reflectance (provisional calibration)

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The Oak Ridge National Laboratory Distributed Active Archive Center (ORNL DAAC) released a new Airborne Validation Unified Experiment Land to Ocean (AVUELO) datasets in December (2025).

AVUELO AVIRIS-3 Orthocorrected Surface Reflectance (provisional calibration)

This dataset contains Level 2A (L2A) orthocorrected surface reflectance and uncertainty estimates from the Airborne Visible / Infrared Imaging Spectrometer-3 (AVIRIS-3) instrument acquired for the Airborne Validation Unified Experiment: Land to Ocean (AVUELO) project in 2025. This L2A data product was generated with a provisional calibration algorithm. Surface hemispherical directional reflectance was derived from calibrated radiance using an optimal estimation algorithm. For each flight scene, two types of NetCDF files are included: orthocorrected surface reflectance (RFL_ORT) and orthocorrected reflectance uncertainty (UNC_ORT).

The NASA AVIRIS-3 is a spectral mapping system that measures reflected radiance at ~7.4-nm intervals in the Visible to Shortwave Infrared (VSWIR) spectral range from 390-2500 nm. It was deployed on a King Air aircraft for AVUELO.

Airborne Validation Unified Experiment Land to Ocean (AVUELO) is a NASA investigation that aims to advance the validation of spaceborne hyperspectral data for tropical ecosystems by combining airborne hyperspectral imagery for terrestrial and marine sites in Panama and Costa Rica with contemporaneous field measurements and collections in February 2025. On-the-ground data collection in Panama encompassed many intensively studied sites and wide variation in soil type, geology, rainfall, and vegetation type. This field work focused on acquiring data on the traits and taxonomic identity of canopy plant species captured in the airborne imagery. This campaign was led and supported by NASA and the Smithsonian Tropical Research Institute (STRI) in Panama, with additional major contributions from other scientists and institutions.

Citation:
Brodrick, P. G., Chlus, A. M., Eckert, R., Chapman, J. W., Eastwood, M., Geier, S., Lundeen, S. R., Olson-Duvall, W., Rios, L. M., Jensen, D. J., Bernas, M., Thompson, D. R., & Green, R. O. (2025). AVUELO AVIRIS-3 Orthocorrected Surface Reflectance (provisional calibration) (Version 1). ORNL Distributed Active Archive Center. https://doi.org/10.3334/ORNLDAAC/2479