Ocean and Sea Ice Retrievals from an End‐to‐End Simulation of the Copernicus Imaging Microwave Radiometer (CIMR) 1.4 to 36.5 GHz Measurements
The Copernicus Imaging Microwave Radiometer (CIMR) is currently being implemented by the European Space Agency (ESA) as a Copernicus Expansion Mission primarily designed to observe the Polar Regions in support of the Integrated European Policy for the Arctic. It is a conically scanning microwave rad...
Published in: | Journal of Geophysical Research: Oceans |
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American Geophysical Union (AGU)
2021
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Online Access: | https://archimer.ifremer.fr/doc/00733/84534/89629.pdf https://doi.org/10.1029/2021JC017610 https://archimer.ifremer.fr/doc/00733/84534/ |
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ftarchimer:oai:archimer.ifremer.fr:84534 2023-05-15T15:02:01+02:00 Ocean and Sea Ice Retrievals from an End‐to‐End Simulation of the Copernicus Imaging Microwave Radiometer (CIMR) 1.4 to 36.5 GHz Measurements Jiménez, Carlos Tenerelli, Joseph Prigent, Catherine Kilic, Lise Lavergne, Thomas Skarpalezos, Sotirios Hoeyer, Jacob L. Reul, Nicolas Donlon, Craig 2021-12 application/pdf https://archimer.ifremer.fr/doc/00733/84534/89629.pdf https://doi.org/10.1029/2021JC017610 https://archimer.ifremer.fr/doc/00733/84534/ eng eng American Geophysical Union (AGU) https://archimer.ifremer.fr/doc/00733/84534/89629.pdf doi:10.1029/2021JC017610 https://archimer.ifremer.fr/doc/00733/84534/ info:eu-repo/semantics/openAccess restricted use Journal Of Geophysical Research-oceans (2169-9275) (American Geophysical Union (AGU)), 2021-12 , Vol. 126 , N. 12 , P. e2021JC017610 (23p.) microwave remote sensing sea surface temperature sea ice salinity brightness temperatures polar regions text Publication info:eu-repo/semantics/article 2021 ftarchimer https://doi.org/10.1029/2021JC017610 2022-05-17T22:50:00Z The Copernicus Imaging Microwave Radiometer (CIMR) is currently being implemented by the European Space Agency (ESA) as a Copernicus Expansion Mission primarily designed to observe the Polar Regions in support of the Integrated European Policy for the Arctic. It is a conically scanning microwave radiometer with polarized channels centered at 1.414, 6.925, 10.65, 18.7, and 36.5 GHz and channel NEΔT between 0.2-0.7 K. A large rotating deployable mesh reflector will provide real-aperture resolutions ranging from 60 (1.4 GHz) to 5 km (36.5 GHz). To evaluate CIMR retrieval performance, a simplified end-to-end simulation of the mission has been carried out. The simulation includes important processes and input parameters, such as test geophysical datasets, forward models, an instrument simulator, and retrieval algorithms to derive the key mission geophysical products. The forward modeling is tested by producing Brightness Temperatures (TBs) from 4 global scenes. A comparison with current observations of the open ocean and sea ice at similar frequencies confirmed the realism of the simulations. The produced top-of-atmosphere TBs are converted to Antenna brightness Temperatures (TAs), taking into account the instrument design, and are then inverted to retrieve Sea Ice Concentration (SIC), Sea Surface Temperature (SST), and Sea Surface Salinity (SSS). Evaluating the retrieval performance showed that the simulated CIMR instrument can provide SST, SSS, and SIC measurements with precisions and spatial resolutions conforming with the mission requirements. The evaluation also highlighted the challenges of observing the Arctic environment, and put in perspective CIMR capabilities compared with current instruments. Plain Language Summary The Copernicus Imaging Microwave Radiometer (CIMR) satellite instrument is currently being implemented to observe the Polar Regions. It will measure different variables, including the temperature and salinity of the ocean surface, and the sea ice extension in the polar ice caps. To help ... Article in Journal/Newspaper Arctic Sea ice Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Arctic Journal of Geophysical Research: Oceans 126 12 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
microwave remote sensing sea surface temperature sea ice salinity brightness temperatures polar regions |
spellingShingle |
microwave remote sensing sea surface temperature sea ice salinity brightness temperatures polar regions Jiménez, Carlos Tenerelli, Joseph Prigent, Catherine Kilic, Lise Lavergne, Thomas Skarpalezos, Sotirios Hoeyer, Jacob L. Reul, Nicolas Donlon, Craig Ocean and Sea Ice Retrievals from an End‐to‐End Simulation of the Copernicus Imaging Microwave Radiometer (CIMR) 1.4 to 36.5 GHz Measurements |
topic_facet |
microwave remote sensing sea surface temperature sea ice salinity brightness temperatures polar regions |
description |
The Copernicus Imaging Microwave Radiometer (CIMR) is currently being implemented by the European Space Agency (ESA) as a Copernicus Expansion Mission primarily designed to observe the Polar Regions in support of the Integrated European Policy for the Arctic. It is a conically scanning microwave radiometer with polarized channels centered at 1.414, 6.925, 10.65, 18.7, and 36.5 GHz and channel NEΔT between 0.2-0.7 K. A large rotating deployable mesh reflector will provide real-aperture resolutions ranging from 60 (1.4 GHz) to 5 km (36.5 GHz). To evaluate CIMR retrieval performance, a simplified end-to-end simulation of the mission has been carried out. The simulation includes important processes and input parameters, such as test geophysical datasets, forward models, an instrument simulator, and retrieval algorithms to derive the key mission geophysical products. The forward modeling is tested by producing Brightness Temperatures (TBs) from 4 global scenes. A comparison with current observations of the open ocean and sea ice at similar frequencies confirmed the realism of the simulations. The produced top-of-atmosphere TBs are converted to Antenna brightness Temperatures (TAs), taking into account the instrument design, and are then inverted to retrieve Sea Ice Concentration (SIC), Sea Surface Temperature (SST), and Sea Surface Salinity (SSS). Evaluating the retrieval performance showed that the simulated CIMR instrument can provide SST, SSS, and SIC measurements with precisions and spatial resolutions conforming with the mission requirements. The evaluation also highlighted the challenges of observing the Arctic environment, and put in perspective CIMR capabilities compared with current instruments. Plain Language Summary The Copernicus Imaging Microwave Radiometer (CIMR) satellite instrument is currently being implemented to observe the Polar Regions. It will measure different variables, including the temperature and salinity of the ocean surface, and the sea ice extension in the polar ice caps. To help ... |
format |
Article in Journal/Newspaper |
author |
Jiménez, Carlos Tenerelli, Joseph Prigent, Catherine Kilic, Lise Lavergne, Thomas Skarpalezos, Sotirios Hoeyer, Jacob L. Reul, Nicolas Donlon, Craig |
author_facet |
Jiménez, Carlos Tenerelli, Joseph Prigent, Catherine Kilic, Lise Lavergne, Thomas Skarpalezos, Sotirios Hoeyer, Jacob L. Reul, Nicolas Donlon, Craig |
author_sort |
Jiménez, Carlos |
title |
Ocean and Sea Ice Retrievals from an End‐to‐End Simulation of the Copernicus Imaging Microwave Radiometer (CIMR) 1.4 to 36.5 GHz Measurements |
title_short |
Ocean and Sea Ice Retrievals from an End‐to‐End Simulation of the Copernicus Imaging Microwave Radiometer (CIMR) 1.4 to 36.5 GHz Measurements |
title_full |
Ocean and Sea Ice Retrievals from an End‐to‐End Simulation of the Copernicus Imaging Microwave Radiometer (CIMR) 1.4 to 36.5 GHz Measurements |
title_fullStr |
Ocean and Sea Ice Retrievals from an End‐to‐End Simulation of the Copernicus Imaging Microwave Radiometer (CIMR) 1.4 to 36.5 GHz Measurements |
title_full_unstemmed |
Ocean and Sea Ice Retrievals from an End‐to‐End Simulation of the Copernicus Imaging Microwave Radiometer (CIMR) 1.4 to 36.5 GHz Measurements |
title_sort |
ocean and sea ice retrievals from an end‐to‐end simulation of the copernicus imaging microwave radiometer (cimr) 1.4 to 36.5 ghz measurements |
publisher |
American Geophysical Union (AGU) |
publishDate |
2021 |
url |
https://archimer.ifremer.fr/doc/00733/84534/89629.pdf https://doi.org/10.1029/2021JC017610 https://archimer.ifremer.fr/doc/00733/84534/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_source |
Journal Of Geophysical Research-oceans (2169-9275) (American Geophysical Union (AGU)), 2021-12 , Vol. 126 , N. 12 , P. e2021JC017610 (23p.) |
op_relation |
https://archimer.ifremer.fr/doc/00733/84534/89629.pdf doi:10.1029/2021JC017610 https://archimer.ifremer.fr/doc/00733/84534/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2021JC017610 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
126 |
container_issue |
12 |
_version_ |
1766334019540090880 |