Impact of the Atmospheric Correction on Infrared Camera Measurements
Monitoring clouds is necessary for many applications, such as aircraft navigation, astronomical observations and others. The height of the top and the bottom of the clouds can be retrieved from satellites and ground-based stations, respectively, by measuring their brightness temperature. In this con...
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ftmdpi:oai:mdpi.com:/2673-4931/19/1/17/ 2023-08-20T04:10:04+02:00 Impact of the Atmospheric Correction on Infrared Camera Measurements Jesús Zarza Belmonte Antonio Serrano Pérez 2022-07-28 application/pdf https://doi.org/10.3390/ecas2022-12859 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/ecas2022-12859 https://creativecommons.org/licenses/by/4.0/ Environmental Sciences Proceedings; Volume 19; Issue 1; Pages: 17 cloud-radiation infrared cameras atmospheric correction water vapor carbon dioxide Text 2022 ftmdpi https://doi.org/10.3390/ecas2022-12859 2023-08-01T06:16:44Z Monitoring clouds is necessary for many applications, such as aircraft navigation, astronomical observations and others. The height of the top and the bottom of the clouds can be retrieved from satellites and ground-based stations, respectively, by measuring their brightness temperature. In this context, ground-based infrared cameras offer interesting information about the spatial distribution of clouds and the height of their bases. Some atmospheric gases interact significantly with the radiation emitted by clouds, aerosols, atmospheric gases and the Earth’s surface, so an atmospheric correction is needed to obtain reliable estimates of a cloud base. In this study, the influence of water vapor and carbon dioxide on the downward radiance measured by a FLIR infrared camera on a height variable cloudy scenario is analyzed. The FLIR A325SC camera spectral response function is considered and standard atmospheric profiles are used. The infrared absorption and emission of the profiles of water vapor and carbon dioxide is estimated by the Python package ‘RADIS’. The results show a positive net atmospheric effect on the downward radiance for all the standard atmospheric profiles considered, which indicates a higher emission contribution of the atmospheric gases compared with the absorption. However, the magnitude of the atmospheric effect significantly depends on the specific atmospheric profile. For example, the atmospheric net emission effect on the downward radiation for high clouds with a Tropical atmospheric profile is around 30 W/(m2·sr), whereas for a Subarctic Winter atmospheric profile it is less than 8 W/(m2·sr). The main results show that the atmospheric effect notably depends also on the vertical gradient, being particularly high for the Tropical profile. Moreover, regarding a specific profile, the atmospheric correction becomes more important for high clouds than for medium or low clouds. Therefore, the atmospheric correction should not be neglected if accurate estimations of the cloud height are to be ... Text Subarctic MDPI Open Access Publishing ECAS 2022 17 |
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MDPI Open Access Publishing |
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ftmdpi |
language |
English |
topic |
cloud-radiation infrared cameras atmospheric correction water vapor carbon dioxide |
spellingShingle |
cloud-radiation infrared cameras atmospheric correction water vapor carbon dioxide Jesús Zarza Belmonte Antonio Serrano Pérez Impact of the Atmospheric Correction on Infrared Camera Measurements |
topic_facet |
cloud-radiation infrared cameras atmospheric correction water vapor carbon dioxide |
description |
Monitoring clouds is necessary for many applications, such as aircraft navigation, astronomical observations and others. The height of the top and the bottom of the clouds can be retrieved from satellites and ground-based stations, respectively, by measuring their brightness temperature. In this context, ground-based infrared cameras offer interesting information about the spatial distribution of clouds and the height of their bases. Some atmospheric gases interact significantly with the radiation emitted by clouds, aerosols, atmospheric gases and the Earth’s surface, so an atmospheric correction is needed to obtain reliable estimates of a cloud base. In this study, the influence of water vapor and carbon dioxide on the downward radiance measured by a FLIR infrared camera on a height variable cloudy scenario is analyzed. The FLIR A325SC camera spectral response function is considered and standard atmospheric profiles are used. The infrared absorption and emission of the profiles of water vapor and carbon dioxide is estimated by the Python package ‘RADIS’. The results show a positive net atmospheric effect on the downward radiance for all the standard atmospheric profiles considered, which indicates a higher emission contribution of the atmospheric gases compared with the absorption. However, the magnitude of the atmospheric effect significantly depends on the specific atmospheric profile. For example, the atmospheric net emission effect on the downward radiation for high clouds with a Tropical atmospheric profile is around 30 W/(m2·sr), whereas for a Subarctic Winter atmospheric profile it is less than 8 W/(m2·sr). The main results show that the atmospheric effect notably depends also on the vertical gradient, being particularly high for the Tropical profile. Moreover, regarding a specific profile, the atmospheric correction becomes more important for high clouds than for medium or low clouds. Therefore, the atmospheric correction should not be neglected if accurate estimations of the cloud height are to be ... |
format |
Text |
author |
Jesús Zarza Belmonte Antonio Serrano Pérez |
author_facet |
Jesús Zarza Belmonte Antonio Serrano Pérez |
author_sort |
Jesús Zarza Belmonte |
title |
Impact of the Atmospheric Correction on Infrared Camera Measurements |
title_short |
Impact of the Atmospheric Correction on Infrared Camera Measurements |
title_full |
Impact of the Atmospheric Correction on Infrared Camera Measurements |
title_fullStr |
Impact of the Atmospheric Correction on Infrared Camera Measurements |
title_full_unstemmed |
Impact of the Atmospheric Correction on Infrared Camera Measurements |
title_sort |
impact of the atmospheric correction on infrared camera measurements |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
https://doi.org/10.3390/ecas2022-12859 |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Environmental Sciences Proceedings; Volume 19; Issue 1; Pages: 17 |
op_relation |
https://dx.doi.org/10.3390/ecas2022-12859 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/ecas2022-12859 |
container_title |
ECAS 2022 |
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17 |
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1774723965611147264 |