Compact Thermal Imager (CTI) for Atmospheric Remote Sensing

The demonstration of a newly developed compact thermal imager (CTI) on the International Space Station (ISS) has provided not only a technology advancement but a rich high-resolution dataset on global clouds, atmospheric and land emissions. This study showed that the free-running CTI instrument coul...

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Autores principales:	Dong L. Wu, Donald E. Jennings, Kwong-Kit Choi, Murzy D. Jhabvala, James A. Limbacher, Thomas Flatley, Kyu-Myong Kim, Anh T. La, Ross J. Salawitch, Luke D. Oman, Jie Gong, Thomas R. Holmes, Douglas C. Morton, Tilak Hewagama, Robert J. Swap
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	thermal imager ISS clouds diurnal cycle limb sounding boundary layer Science Q
Acceso en línea:	https://doaj.org/article/9c4b8d7d72414d5a9e944a452e4641e7
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id	oai:doaj.org-article:9c4b8d7d72414d5a9e944a452e4641e7
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spelling	oai:doaj.org-article:9c4b8d7d72414d5a9e944a452e4641e72021-11-25T18:54:30ZCompact Thermal Imager (CTI) for Atmospheric Remote Sensing10.3390/rs132245782072-4292https://doaj.org/article/9c4b8d7d72414d5a9e944a452e4641e72021-11-01T00:00:00Zhttps://www.mdpi.com/2072-4292/13/22/4578https://doaj.org/toc/2072-4292The demonstration of a newly developed compact thermal imager (CTI) on the International Space Station (ISS) has provided not only a technology advancement but a rich high-resolution dataset on global clouds, atmospheric and land emissions. This study showed that the free-running CTI instrument could be calibrated to produce scientifically useful radiance imagery of the atmosphere, clouds, and surfaces with a vertical resolution of ~460 m at limb and a horizontal resolution of ~80 m at nadir. The new detector demonstrated an excellent sensitivity to detect the weak limb radiance perturbations modulated by small-scale atmospheric gravity waves. The CTI’s high-resolution imaging was used to infer vertical cloud temperature profiles from a side-viewing geometry. For nadir imaging, the combined high-resolution and high-sensitivity capabilities allowed the CTI to better separate cloud and surface emissions, including those in the planetary boundary layer (PBL) that had small contrast against the background surface. Finally, based on the ISS’s orbit, the stable detector performance and robust calibration algorithm produced valuable diurnal observations of cloud and surface emissions with respect to solar local time during May–October 2019, when the CTI had nearly continuous operation.Dong L. WuDonald E. JenningsKwong-Kit ChoiMurzy D. JhabvalaJames A. LimbacherThomas FlatleyKyu-Myong KimAnh T. LaRoss J. SalawitchLuke D. OmanJie GongThomas R. HolmesDouglas C. MortonTilak HewagamaRobert J. SwapMDPI AGarticlethermal imagerISScloudsdiurnal cyclelimb soundingboundary layerScienceQENRemote Sensing, Vol 13, Iss 4578, p 4578 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	thermal imager ISS clouds diurnal cycle limb sounding boundary layer Science Q
spellingShingle	thermal imager ISS clouds diurnal cycle limb sounding boundary layer Science Q Dong L. Wu Donald E. Jennings Kwong-Kit Choi Murzy D. Jhabvala James A. Limbacher Thomas Flatley Kyu-Myong Kim Anh T. La Ross J. Salawitch Luke D. Oman Jie Gong Thomas R. Holmes Douglas C. Morton Tilak Hewagama Robert J. Swap Compact Thermal Imager (CTI) for Atmospheric Remote Sensing
description	The demonstration of a newly developed compact thermal imager (CTI) on the International Space Station (ISS) has provided not only a technology advancement but a rich high-resolution dataset on global clouds, atmospheric and land emissions. This study showed that the free-running CTI instrument could be calibrated to produce scientifically useful radiance imagery of the atmosphere, clouds, and surfaces with a vertical resolution of ~460 m at limb and a horizontal resolution of ~80 m at nadir. The new detector demonstrated an excellent sensitivity to detect the weak limb radiance perturbations modulated by small-scale atmospheric gravity waves. The CTI’s high-resolution imaging was used to infer vertical cloud temperature profiles from a side-viewing geometry. For nadir imaging, the combined high-resolution and high-sensitivity capabilities allowed the CTI to better separate cloud and surface emissions, including those in the planetary boundary layer (PBL) that had small contrast against the background surface. Finally, based on the ISS’s orbit, the stable detector performance and robust calibration algorithm produced valuable diurnal observations of cloud and surface emissions with respect to solar local time during May–October 2019, when the CTI had nearly continuous operation.
format	article
author	Dong L. Wu Donald E. Jennings Kwong-Kit Choi Murzy D. Jhabvala James A. Limbacher Thomas Flatley Kyu-Myong Kim Anh T. La Ross J. Salawitch Luke D. Oman Jie Gong Thomas R. Holmes Douglas C. Morton Tilak Hewagama Robert J. Swap
author_facet	Dong L. Wu Donald E. Jennings Kwong-Kit Choi Murzy D. Jhabvala James A. Limbacher Thomas Flatley Kyu-Myong Kim Anh T. La Ross J. Salawitch Luke D. Oman Jie Gong Thomas R. Holmes Douglas C. Morton Tilak Hewagama Robert J. Swap
author_sort	Dong L. Wu
title	Compact Thermal Imager (CTI) for Atmospheric Remote Sensing
title_short	Compact Thermal Imager (CTI) for Atmospheric Remote Sensing
title_full	Compact Thermal Imager (CTI) for Atmospheric Remote Sensing
title_fullStr	Compact Thermal Imager (CTI) for Atmospheric Remote Sensing
title_full_unstemmed	Compact Thermal Imager (CTI) for Atmospheric Remote Sensing
title_sort	compact thermal imager (cti) for atmospheric remote sensing
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/9c4b8d7d72414d5a9e944a452e4641e7
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Compact Thermal Imager (CTI) for Atmospheric Remote Sensing

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