Polarization lidar for detecting dust orientation: system design and calibration

<p>Dust orientation has been an ongoing investigation in recent years. Its potential proof will be a paradigm shift for dust remote sensing, invalidating the currently used simplifications of randomly oriented particles. Vertically resolved measurements of dust orientation can be acquired with...

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Autores principales:	A. Tsekeri, V. Amiridis, A. Louridas, G. Georgoussis, V. Freudenthaler, S. Metallinos, G. Doxastakis, J. Gasteiger, N. Siomos, P. Paschou, T. Georgiou, G. Tsaknakis, C. Evangelatos, I. Binietoglou
Formato:	article
Lenguaje:	EN
Publicado:	Copernicus Publications 2021
Materias:	Environmental engineering TA170-171 Earthwork. Foundations TA715-787
Acceso en línea:	https://doaj.org/article/3e5ec0af451d4aa5ae70219b44bc6378
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spelling	oai:doaj.org-article:3e5ec0af451d4aa5ae70219b44bc63782021-12-01T10:54:09ZPolarization lidar for detecting dust orientation: system design and calibration10.5194/amt-14-7453-20211867-13811867-8548https://doaj.org/article/3e5ec0af451d4aa5ae70219b44bc63782021-12-01T00:00:00Zhttps://amt.copernicus.org/articles/14/7453/2021/amt-14-7453-2021.pdfhttps://doaj.org/toc/1867-1381https://doaj.org/toc/1867-8548<p>Dust orientation has been an ongoing investigation in recent years. Its potential proof will be a paradigm shift for dust remote sensing, invalidating the currently used simplifications of randomly oriented particles. Vertically resolved measurements of dust orientation can be acquired with a polarization lidar designed to target the off-diagonal elements of the backscatter matrix which are nonzero only when the particles are oriented. Building on previous studies, we constructed a lidar system emitting linearly and elliptically polarized light at 1064 nm and detecting the linear and circular polarization of the backscattered light. Its measurements provide direct flags of dust orientation, as well as more detailed information of the particle microphysics. The system also has the capability to acquire measurements at varying viewing angles. Moreover, in order to achieve good signal-to-noise ratio in short measurement times, the system is equipped with two laser sources emitting in an interleaved fashion and two telescopes for detecting the backscattered light from both lasers. Herein we provide a description of the optical and mechanical parts of this new lidar system, the scientific and technical objectives of its design, and the calibration methodologies tailored for the measurements of oriented dust particles. We also provide the first, preliminary measurements of the system during a dust-free day. The work presented does not include the detection of oriented dust (or other oriented particles), and therefore the instrument has not been tested fully in this objective.</p>A. TsekeriV. AmiridisA. LouridasG. GeorgoussisV. FreudenthalerS. MetallinosG. DoxastakisJ. GasteigerN. SiomosP. PaschouT. GeorgiouG. TsaknakisC. EvangelatosI. BinietoglouCopernicus PublicationsarticleEnvironmental engineeringTA170-171Earthwork. FoundationsTA715-787ENAtmospheric Measurement Techniques, Vol 14, Pp 7453-7474 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Environmental engineering TA170-171 Earthwork. Foundations TA715-787
spellingShingle	Environmental engineering TA170-171 Earthwork. Foundations TA715-787 A. Tsekeri V. Amiridis A. Louridas G. Georgoussis V. Freudenthaler S. Metallinos G. Doxastakis J. Gasteiger N. Siomos P. Paschou T. Georgiou G. Tsaknakis C. Evangelatos I. Binietoglou Polarization lidar for detecting dust orientation: system design and calibration
description	<p>Dust orientation has been an ongoing investigation in recent years. Its potential proof will be a paradigm shift for dust remote sensing, invalidating the currently used simplifications of randomly oriented particles. Vertically resolved measurements of dust orientation can be acquired with a polarization lidar designed to target the off-diagonal elements of the backscatter matrix which are nonzero only when the particles are oriented. Building on previous studies, we constructed a lidar system emitting linearly and elliptically polarized light at 1064 nm and detecting the linear and circular polarization of the backscattered light. Its measurements provide direct flags of dust orientation, as well as more detailed information of the particle microphysics. The system also has the capability to acquire measurements at varying viewing angles. Moreover, in order to achieve good signal-to-noise ratio in short measurement times, the system is equipped with two laser sources emitting in an interleaved fashion and two telescopes for detecting the backscattered light from both lasers. Herein we provide a description of the optical and mechanical parts of this new lidar system, the scientific and technical objectives of its design, and the calibration methodologies tailored for the measurements of oriented dust particles. We also provide the first, preliminary measurements of the system during a dust-free day. The work presented does not include the detection of oriented dust (or other oriented particles), and therefore the instrument has not been tested fully in this objective.</p>
format	article
author	A. Tsekeri V. Amiridis A. Louridas G. Georgoussis V. Freudenthaler S. Metallinos G. Doxastakis J. Gasteiger N. Siomos P. Paschou T. Georgiou G. Tsaknakis C. Evangelatos I. Binietoglou
author_facet	A. Tsekeri V. Amiridis A. Louridas G. Georgoussis V. Freudenthaler S. Metallinos G. Doxastakis J. Gasteiger N. Siomos P. Paschou T. Georgiou G. Tsaknakis C. Evangelatos I. Binietoglou
author_sort	A. Tsekeri
title	Polarization lidar for detecting dust orientation: system design and calibration
title_short	Polarization lidar for detecting dust orientation: system design and calibration
title_full	Polarization lidar for detecting dust orientation: system design and calibration
title_fullStr	Polarization lidar for detecting dust orientation: system design and calibration
title_full_unstemmed	Polarization lidar for detecting dust orientation: system design and calibration
title_sort	polarization lidar for detecting dust orientation: system design and calibration
publisher	Copernicus Publications
publishDate	2021
url	https://doaj.org/article/3e5ec0af451d4aa5ae70219b44bc6378
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_version_	1718405228131254272

Polarization lidar for detecting dust orientation: system design and calibration

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