Data processing and acquisition geometry impact the estimation of plant trait-based functional richness from airborne imaging spectroscopy

Vögtli, Marius; Helfenstein, Isabelle S; Schläpfer, Daniel; Schuman, Meredith Christine; Kneubühler, Mathias; Damm, Alexander

doi:10.1016/j.rse.2025.114846

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Vögtli, M., Helfenstein, I. S., Schläpfer, D., Schuman, M. C., Kneubühler, M., & Damm, A. (2025). Data processing and acquisition geometry impact the estimation of plant trait-based functional richness from airborne imaging spectroscopy. Remote Sensing of Environment, 328, 114846. https://doi.org/10.1016/j.rse.2025.114846

Abstract

Functional diversity can be assessed remotely from optical sensors using vegetation index-based plant traits. Without effective corrections, employed reflectance values are affected by absorption and scattering processes in the atmosphere and on the ground, which modify radiance and irradiance values used for the reflectance retrieval. Additionally, the anisotropic nature of vegetation canopies induces observation and illumination angle-dependent reflectance variations. Often, however, the reflectance retrieval is not accurate enough