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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...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Molecular Diversity Preservation International (MDPI)
2012
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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. |
format | Online Article Text |
id | pubmed-3571842 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | Molecular Diversity Preservation International (MDPI) |
record_format | MEDLINE/PubMed |
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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