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Calibration to maximize temporal radiometric repeatability of airborne hyperspectral imaging data

Many studies provide insight into calibration of airborne remote sensing data but very few specifically address the issue of temporal radiometric repeatability. In this study, we acquired airborne hyperspectral optical sensing data from experimental objects (white Teflon and colored panels) during 5...

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Autores principales: Nansen, Christian, Lee, Hyoseok, Mantri, Anil
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9968805/
https://www.ncbi.nlm.nih.gov/pubmed/36860905
http://dx.doi.org/10.3389/fpls.2023.1051410
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author Nansen, Christian
Lee, Hyoseok
Mantri, Anil
author_facet Nansen, Christian
Lee, Hyoseok
Mantri, Anil
author_sort Nansen, Christian
collection PubMed
description Many studies provide insight into calibration of airborne remote sensing data but very few specifically address the issue of temporal radiometric repeatability. In this study, we acquired airborne hyperspectral optical sensing data from experimental objects (white Teflon and colored panels) during 52 flight missions on three separate days. Data sets were subjected to four radiometric calibration methods: no radiometric calibration (radiance data), empirical line method calibration based on white calibration boards (ELM calibration), and two atmospheric radiative transfer model calibrations: 1) radiometric calibration with irradiance data acquired with a drone-mounted down-welling sensor (ARTM), and 2) modeled sun parameters and weather variables in combination with irradiance data from drone-mounted down-welling sensor (ARTM+). Spectral bands from 900-970 nm were found to be associated with disproportionally lower temporal radiometric repeatability than spectral bands from 416-900 nm. ELM calibration was found to be highly sensitive to time of flight missions (which is directly linked to sun parameters and weather conditions). Both ARTM calibrations outperformed ELM calibration, especially ARTM2+. Importantly, ARTM+ calibration markedly attenuated loss of radiometric repeatability in spectral bands beyond 900 nm and therefore improved possible contributions of these spectral bands to classification functions. We conclude that a minimum of 5% radiometric error (radiometric repeatability<95%), and probably considerably more error, should be expected when airborne remote sensing data are acquired at multiple time points across days. Consequently, objects being classified should be in classes that are at least 5% different in terms of average optical traits for classification functions to perform with high degree of accuracy and consistency. This study provides strong support for the claim that airborne remote sensing studies should include repeated data acquisitions from same objects at multiple time points. Such temporal replication is essential for classification functions to capture variation and stochastic noise caused by imaging equipment, and abiotic and environmental variables.
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spelling pubmed-99688052023-02-28 Calibration to maximize temporal radiometric repeatability of airborne hyperspectral imaging data Nansen, Christian Lee, Hyoseok Mantri, Anil Front Plant Sci Plant Science Many studies provide insight into calibration of airborne remote sensing data but very few specifically address the issue of temporal radiometric repeatability. In this study, we acquired airborne hyperspectral optical sensing data from experimental objects (white Teflon and colored panels) during 52 flight missions on three separate days. Data sets were subjected to four radiometric calibration methods: no radiometric calibration (radiance data), empirical line method calibration based on white calibration boards (ELM calibration), and two atmospheric radiative transfer model calibrations: 1) radiometric calibration with irradiance data acquired with a drone-mounted down-welling sensor (ARTM), and 2) modeled sun parameters and weather variables in combination with irradiance data from drone-mounted down-welling sensor (ARTM+). Spectral bands from 900-970 nm were found to be associated with disproportionally lower temporal radiometric repeatability than spectral bands from 416-900 nm. ELM calibration was found to be highly sensitive to time of flight missions (which is directly linked to sun parameters and weather conditions). Both ARTM calibrations outperformed ELM calibration, especially ARTM2+. Importantly, ARTM+ calibration markedly attenuated loss of radiometric repeatability in spectral bands beyond 900 nm and therefore improved possible contributions of these spectral bands to classification functions. We conclude that a minimum of 5% radiometric error (radiometric repeatability<95%), and probably considerably more error, should be expected when airborne remote sensing data are acquired at multiple time points across days. Consequently, objects being classified should be in classes that are at least 5% different in terms of average optical traits for classification functions to perform with high degree of accuracy and consistency. This study provides strong support for the claim that airborne remote sensing studies should include repeated data acquisitions from same objects at multiple time points. Such temporal replication is essential for classification functions to capture variation and stochastic noise caused by imaging equipment, and abiotic and environmental variables. Frontiers Media S.A. 2023-02-13 /pmc/articles/PMC9968805/ /pubmed/36860905 http://dx.doi.org/10.3389/fpls.2023.1051410 Text en Copyright © 2023 Nansen, Lee and Mantri https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Nansen, Christian
Lee, Hyoseok
Mantri, Anil
Calibration to maximize temporal radiometric repeatability of airborne hyperspectral imaging data
title Calibration to maximize temporal radiometric repeatability of airborne hyperspectral imaging data
title_full Calibration to maximize temporal radiometric repeatability of airborne hyperspectral imaging data
title_fullStr Calibration to maximize temporal radiometric repeatability of airborne hyperspectral imaging data
title_full_unstemmed Calibration to maximize temporal radiometric repeatability of airborne hyperspectral imaging data
title_short Calibration to maximize temporal radiometric repeatability of airborne hyperspectral imaging data
title_sort calibration to maximize temporal radiometric repeatability of airborne hyperspectral imaging data
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9968805/
https://www.ncbi.nlm.nih.gov/pubmed/36860905
http://dx.doi.org/10.3389/fpls.2023.1051410
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