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A Laboratory Goniometer System for Measuring Reflectance and Emittance Anisotropy

In this paper, a laboratory goniometer system for performing multi-angular measurements under controlled illumination conditions is described. A commercially available robotic arm enables the acquisition of a large number of measurements over the full hemisphere within a short time span making it mu...

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Autores principales: Roosjen, Peter P. J., Clevers, Jan G. P. W., Bartholomeus, Harm M., Schaepman, Michael E., Schaepman-Strub, Gabriela, Jalink, Henk, van der Schoor, Rob, de Jong, Arjan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Molecular Diversity Preservation International (MDPI) 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3571842/
https://www.ncbi.nlm.nih.gov/pubmed/23443402
http://dx.doi.org/10.3390/s121217358
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author Roosjen, Peter P. J.
Clevers, Jan G. P. W.
Bartholomeus, Harm M.
Schaepman, Michael E.
Schaepman-Strub, Gabriela
Jalink, Henk
van der Schoor, Rob
de Jong, Arjan
author_facet Roosjen, Peter P. J.
Clevers, Jan G. P. W.
Bartholomeus, Harm M.
Schaepman, Michael E.
Schaepman-Strub, Gabriela
Jalink, Henk
van der Schoor, Rob
de Jong, Arjan
author_sort Roosjen, Peter P. J.
collection PubMed
description In this paper, a laboratory goniometer system for performing multi-angular measurements under controlled illumination conditions is described. A commercially available robotic arm enables the acquisition of a large number of measurements over the full hemisphere within a short time span making it much faster than other goniometers. In addition, the presented set-up enables assessment of anisotropic reflectance and emittance behaviour of soils, leaves and small canopies. Mounting a spectrometer enables acquisition of either hemispherical measurements or measurements in the horizontal plane. Mounting a thermal camera allows directional observations of the thermal emittance. This paper also presents three showcases of these different measurement set-ups in order to illustrate its possibilities. Finally, suggestions for applying this instrument and for future research directions are given, including linking the measured reflectance anisotropy with physically-based anisotropy models on the one hand and combining them with field goniometry measurements for joint analysis with remote sensing data on the other hand. The speed and flexibility of the system offer a large added value to the existing pool of laboratory goniometers.
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spelling pubmed-35718422013-02-19 A Laboratory Goniometer System for Measuring Reflectance and Emittance Anisotropy Roosjen, Peter P. J. Clevers, Jan G. P. W. Bartholomeus, Harm M. Schaepman, Michael E. Schaepman-Strub, Gabriela Jalink, Henk van der Schoor, Rob de Jong, Arjan Sensors (Basel) Article In this paper, a laboratory goniometer system for performing multi-angular measurements under controlled illumination conditions is described. A commercially available robotic arm enables the acquisition of a large number of measurements over the full hemisphere within a short time span making it much faster than other goniometers. In addition, the presented set-up enables assessment of anisotropic reflectance and emittance behaviour of soils, leaves and small canopies. Mounting a spectrometer enables acquisition of either hemispherical measurements or measurements in the horizontal plane. Mounting a thermal camera allows directional observations of the thermal emittance. This paper also presents three showcases of these different measurement set-ups in order to illustrate its possibilities. Finally, suggestions for applying this instrument and for future research directions are given, including linking the measured reflectance anisotropy with physically-based anisotropy models on the one hand and combining them with field goniometry measurements for joint analysis with remote sensing data on the other hand. The speed and flexibility of the system offer a large added value to the existing pool of laboratory goniometers. Molecular Diversity Preservation International (MDPI) 2012-12-13 /pmc/articles/PMC3571842/ /pubmed/23443402 http://dx.doi.org/10.3390/s121217358 Text en © 2012 by the authors; licensee MDPI, Basel, Switzerland This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Roosjen, Peter P. J.
Clevers, Jan G. P. W.
Bartholomeus, Harm M.
Schaepman, Michael E.
Schaepman-Strub, Gabriela
Jalink, Henk
van der Schoor, Rob
de Jong, Arjan
A Laboratory Goniometer System for Measuring Reflectance and Emittance Anisotropy
title A Laboratory Goniometer System for Measuring Reflectance and Emittance Anisotropy
title_full A Laboratory Goniometer System for Measuring Reflectance and Emittance Anisotropy
title_fullStr A Laboratory Goniometer System for Measuring Reflectance and Emittance Anisotropy
title_full_unstemmed A Laboratory Goniometer System for Measuring Reflectance and Emittance Anisotropy
title_short A Laboratory Goniometer System for Measuring Reflectance and Emittance Anisotropy
title_sort laboratory goniometer system for measuring reflectance and emittance anisotropy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3571842/
https://www.ncbi.nlm.nih.gov/pubmed/23443402
http://dx.doi.org/10.3390/s121217358
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