A microbolometer-based far infrared radiometer to study thin ice clouds in the Arctic
A far infrared radiometer (FIRR) dedicated to measuring radiation emitted by clear and cloudy atmospheres was developed in the framework of the Thin Ice Clouds in Far InfraRed Experiment (TICFIRE) technology demonstration satellite project. The FIRR detector is an array of 80 × 60 uncooled microbolo...
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Copernicus Publications
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00013519 2023-05-15T15:11:49+02:00 A microbolometer-based far infrared radiometer to study thin ice clouds in the Arctic Libois, Quentin Proulx, Christian Ivanescu, Liviu Coursol, Laurence Pelletier, Ludovick S. Bouzid, Yacine Barbero, Francesco Girard, Éric Blanchet, Jean-Pierre 2016-04 electronic https://doi.org/10.5194/amt-9-1817-2016 https://noa.gwlb.de/receive/cop_mods_00013519 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00013475/amt-9-1817-2016.pdf https://amt.copernicus.org/articles/9/1817/2016/amt-9-1817-2016.pdf eng eng Copernicus Publications Atmospheric Measurement Techniques -- http://www.bibliothek.uni-regensburg.de/ezeit/?2505596 -- http://www.atmospheric-measurement-techniques.net/ -- 1867-8548 https://doi.org/10.5194/amt-9-1817-2016 https://noa.gwlb.de/receive/cop_mods_00013519 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00013475/amt-9-1817-2016.pdf https://amt.copernicus.org/articles/9/1817/2016/amt-9-1817-2016.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2016 ftnonlinearchiv https://doi.org/10.5194/amt-9-1817-2016 2022-02-08T22:55:33Z A far infrared radiometer (FIRR) dedicated to measuring radiation emitted by clear and cloudy atmospheres was developed in the framework of the Thin Ice Clouds in Far InfraRed Experiment (TICFIRE) technology demonstration satellite project. The FIRR detector is an array of 80 × 60 uncooled microbolometers coated with gold black to enhance the absorptivity and responsivity. A filter wheel is used to select atmospheric radiation in nine spectral bands ranging from 8 to 50 µm. Calibrated radiances are obtained using two well-calibrated blackbodies. Images are acquired at a frame rate of 120 Hz, and temporally averaged to reduce electronic noise. A complete measurement sequence takes about 120 s. With a field of view of 6°, the FIRR is not intended to be an imager. Hence spatial average is computed over 193 illuminated pixels to increase the signal-to-noise ratio and consequently the detector resolution. This results in an improvement by a factor of 5 compared to individual pixel measurements. Another threefold increase in resolution is obtained using 193 non-illuminated pixels to remove correlated electronic noise, leading an overall resolution of approximately 0.015 W m−2 sr−1. Laboratory measurements performed on well-known targets suggest an absolute accuracy close to 0.02 W m−2 sr−1, which ensures atmospheric radiance is retrieved with an accuracy better than 1 %. Preliminary in situ experiments performed from the ground in winter and in summer on clear and cloudy atmospheres are compared to radiative transfer simulations. They point out the FIRR ability to detect clouds and changes in relative humidity of a few percent in various atmospheric conditions, paving the way for the development of new algorithms dedicated to ice cloud characterization and water vapor retrieval. Article in Journal/Newspaper Arctic Niedersächsisches Online-Archiv NOA Arctic Atmospheric Measurement Techniques 9 4 1817 1832 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
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English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Libois, Quentin Proulx, Christian Ivanescu, Liviu Coursol, Laurence Pelletier, Ludovick S. Bouzid, Yacine Barbero, Francesco Girard, Éric Blanchet, Jean-Pierre A microbolometer-based far infrared radiometer to study thin ice clouds in the Arctic |
topic_facet |
article Verlagsveröffentlichung |
description |
A far infrared radiometer (FIRR) dedicated to measuring radiation emitted by clear and cloudy atmospheres was developed in the framework of the Thin Ice Clouds in Far InfraRed Experiment (TICFIRE) technology demonstration satellite project. The FIRR detector is an array of 80 × 60 uncooled microbolometers coated with gold black to enhance the absorptivity and responsivity. A filter wheel is used to select atmospheric radiation in nine spectral bands ranging from 8 to 50 µm. Calibrated radiances are obtained using two well-calibrated blackbodies. Images are acquired at a frame rate of 120 Hz, and temporally averaged to reduce electronic noise. A complete measurement sequence takes about 120 s. With a field of view of 6°, the FIRR is not intended to be an imager. Hence spatial average is computed over 193 illuminated pixels to increase the signal-to-noise ratio and consequently the detector resolution. This results in an improvement by a factor of 5 compared to individual pixel measurements. Another threefold increase in resolution is obtained using 193 non-illuminated pixels to remove correlated electronic noise, leading an overall resolution of approximately 0.015 W m−2 sr−1. Laboratory measurements performed on well-known targets suggest an absolute accuracy close to 0.02 W m−2 sr−1, which ensures atmospheric radiance is retrieved with an accuracy better than 1 %. Preliminary in situ experiments performed from the ground in winter and in summer on clear and cloudy atmospheres are compared to radiative transfer simulations. They point out the FIRR ability to detect clouds and changes in relative humidity of a few percent in various atmospheric conditions, paving the way for the development of new algorithms dedicated to ice cloud characterization and water vapor retrieval. |
format |
Article in Journal/Newspaper |
author |
Libois, Quentin Proulx, Christian Ivanescu, Liviu Coursol, Laurence Pelletier, Ludovick S. Bouzid, Yacine Barbero, Francesco Girard, Éric Blanchet, Jean-Pierre |
author_facet |
Libois, Quentin Proulx, Christian Ivanescu, Liviu Coursol, Laurence Pelletier, Ludovick S. Bouzid, Yacine Barbero, Francesco Girard, Éric Blanchet, Jean-Pierre |
author_sort |
Libois, Quentin |
title |
A microbolometer-based far infrared radiometer to study thin ice clouds in the Arctic |
title_short |
A microbolometer-based far infrared radiometer to study thin ice clouds in the Arctic |
title_full |
A microbolometer-based far infrared radiometer to study thin ice clouds in the Arctic |
title_fullStr |
A microbolometer-based far infrared radiometer to study thin ice clouds in the Arctic |
title_full_unstemmed |
A microbolometer-based far infrared radiometer to study thin ice clouds in the Arctic |
title_sort |
microbolometer-based far infrared radiometer to study thin ice clouds in the arctic |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/amt-9-1817-2016 https://noa.gwlb.de/receive/cop_mods_00013519 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00013475/amt-9-1817-2016.pdf https://amt.copernicus.org/articles/9/1817/2016/amt-9-1817-2016.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Atmospheric Measurement Techniques -- http://www.bibliothek.uni-regensburg.de/ezeit/?2505596 -- http://www.atmospheric-measurement-techniques.net/ -- 1867-8548 https://doi.org/10.5194/amt-9-1817-2016 https://noa.gwlb.de/receive/cop_mods_00013519 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00013475/amt-9-1817-2016.pdf https://amt.copernicus.org/articles/9/1817/2016/amt-9-1817-2016.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/amt-9-1817-2016 |
container_title |
Atmospheric Measurement Techniques |
container_volume |
9 |
container_issue |
4 |
container_start_page |
1817 |
op_container_end_page |
1832 |
_version_ |
1766342609478877184 |