ProVal: A New Autonomous Profiling Float for High Quality Radiometric Measurements
An efficient system to produce in situ high quality radiometric measurements is compulsory to rigorously perform the vicarious calibration of satellite sensors dedicated to Ocean Color Radiometry (OCR) and to validate their derived products. This requirement is especially needed during the early sta...
Published in: | Frontiers in Marine Science |
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Online Access: | https://archimer.ifremer.fr/doc/00585/69694/67579.pdf https://archimer.ifremer.fr/doc/00585/69694/67580.pdf https://doi.org/10.3389/fmars.2018.00437 https://archimer.ifremer.fr/doc/00585/69694/ |
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ftarchimer:oai:archimer.ifremer.fr:69694 2023-05-15T15:33:58+02:00 ProVal: A New Autonomous Profiling Float for High Quality Radiometric Measurements Leymarie, Edouard Penkerc'H, Christophe Vellucci, Vincenzo Lerebourg, Christophe Antoine, David Boss, Emmanuel Lewis, Marion R. D'Ortenzio, Fabrizio Claustre, Herve 2018-11 application/pdf https://archimer.ifremer.fr/doc/00585/69694/67579.pdf https://archimer.ifremer.fr/doc/00585/69694/67580.pdf https://doi.org/10.3389/fmars.2018.00437 https://archimer.ifremer.fr/doc/00585/69694/ eng eng Frontiers Media Sa https://archimer.ifremer.fr/doc/00585/69694/67579.pdf https://archimer.ifremer.fr/doc/00585/69694/67580.pdf doi:10.3389/fmars.2018.00437 https://archimer.ifremer.fr/doc/00585/69694/ info:eu-repo/semantics/openAccess restricted use Frontiers In Marine Science (2296-7745) (Frontiers Media Sa), 2018-11 , Vol. 5 , N. 437 , P. 18p. autonomous profiling floats remote sensing reflectance ocean color validation system vicarious calibration austral ocean Mediterranean Sea radiometric measurement text Publication info:eu-repo/semantics/article 2018 ftarchimer https://doi.org/10.3389/fmars.2018.00437 2021-09-23T20:33:33Z An efficient system to produce in situ high quality radiometric measurements is compulsory to rigorously perform the vicarious calibration of satellite sensors dedicated to Ocean Color Radiometry (OCR) and to validate their derived products. This requirement is especially needed during the early stages of an OCR satellite activity or for remote areas poorly covered by oceanographic cruises with possible bio-optical anomalies. Taking advantage of Argo's profiling float technology, we present a new autonomous profiling float dedicated to in situ radiometric measurements. The float is based on the Provor CTS5 (manufacturer NKE) with an added novel two protruding arm design allowing for sensor redundancies, shading mitigation and near-surface data. Equipped with two identical radiometers on each arm that measure downward irradiance and upwelling radiance at seven wavelengths, the ProVal float generates both redundant radiometric profiles as well as an estimate of Remote Sensing Reflectance. Results from 449 profiles obtained in the NW Mediterranean Sea and in the Indian sector of the Southern Ocean are presented to illustrate the ProVal float technical maturity. Analysis of the behavior of the profiling float, including tilting and ascent speeds is presented. The vertical stability of the ProVal exhibits 85% of surface data of the Mediterranean Sea with a tilt smaller than 10 degrees. This percentage is 40% in the Southern Ocean due to rougher seas. Redundant sensors provide a characterization of the relative drift between sensors over the deployment which is found to be <0.15% per month over a year. Post-cruise calibration of a recovered float revealed no significant drift. As an example of the utility of ProVal floats, a match-up of Remote Sensing Reflectance measured with the European Space Agency Ocean and Land Color Imager (OLCI onboard Sentinel-3A) is shown. It follows that profiling floats, such as ProVal, could provide a significant contribution to an upcoming global System Vicarious Calibration of space-based radiometers. Article in Journal/Newspaper Austral Ocean Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Austral Austral Ocean ENVELOPE(90.000,90.000,-60.000,-60.000) Indian Proval ENVELOPE(71.083,71.083,-71.683,-71.683) Southern Ocean Tilting ENVELOPE(-54.065,-54.065,49.700,49.700) Frontiers in Marine Science 5 |
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 |
autonomous profiling floats remote sensing reflectance ocean color validation system vicarious calibration austral ocean Mediterranean Sea radiometric measurement |
spellingShingle |
autonomous profiling floats remote sensing reflectance ocean color validation system vicarious calibration austral ocean Mediterranean Sea radiometric measurement Leymarie, Edouard Penkerc'H, Christophe Vellucci, Vincenzo Lerebourg, Christophe Antoine, David Boss, Emmanuel Lewis, Marion R. D'Ortenzio, Fabrizio Claustre, Herve ProVal: A New Autonomous Profiling Float for High Quality Radiometric Measurements |
topic_facet |
autonomous profiling floats remote sensing reflectance ocean color validation system vicarious calibration austral ocean Mediterranean Sea radiometric measurement |
description |
An efficient system to produce in situ high quality radiometric measurements is compulsory to rigorously perform the vicarious calibration of satellite sensors dedicated to Ocean Color Radiometry (OCR) and to validate their derived products. This requirement is especially needed during the early stages of an OCR satellite activity or for remote areas poorly covered by oceanographic cruises with possible bio-optical anomalies. Taking advantage of Argo's profiling float technology, we present a new autonomous profiling float dedicated to in situ radiometric measurements. The float is based on the Provor CTS5 (manufacturer NKE) with an added novel two protruding arm design allowing for sensor redundancies, shading mitigation and near-surface data. Equipped with two identical radiometers on each arm that measure downward irradiance and upwelling radiance at seven wavelengths, the ProVal float generates both redundant radiometric profiles as well as an estimate of Remote Sensing Reflectance. Results from 449 profiles obtained in the NW Mediterranean Sea and in the Indian sector of the Southern Ocean are presented to illustrate the ProVal float technical maturity. Analysis of the behavior of the profiling float, including tilting and ascent speeds is presented. The vertical stability of the ProVal exhibits 85% of surface data of the Mediterranean Sea with a tilt smaller than 10 degrees. This percentage is 40% in the Southern Ocean due to rougher seas. Redundant sensors provide a characterization of the relative drift between sensors over the deployment which is found to be <0.15% per month over a year. Post-cruise calibration of a recovered float revealed no significant drift. As an example of the utility of ProVal floats, a match-up of Remote Sensing Reflectance measured with the European Space Agency Ocean and Land Color Imager (OLCI onboard Sentinel-3A) is shown. It follows that profiling floats, such as ProVal, could provide a significant contribution to an upcoming global System Vicarious Calibration of space-based radiometers. |
format |
Article in Journal/Newspaper |
author |
Leymarie, Edouard Penkerc'H, Christophe Vellucci, Vincenzo Lerebourg, Christophe Antoine, David Boss, Emmanuel Lewis, Marion R. D'Ortenzio, Fabrizio Claustre, Herve |
author_facet |
Leymarie, Edouard Penkerc'H, Christophe Vellucci, Vincenzo Lerebourg, Christophe Antoine, David Boss, Emmanuel Lewis, Marion R. D'Ortenzio, Fabrizio Claustre, Herve |
author_sort |
Leymarie, Edouard |
title |
ProVal: A New Autonomous Profiling Float for High Quality Radiometric Measurements |
title_short |
ProVal: A New Autonomous Profiling Float for High Quality Radiometric Measurements |
title_full |
ProVal: A New Autonomous Profiling Float for High Quality Radiometric Measurements |
title_fullStr |
ProVal: A New Autonomous Profiling Float for High Quality Radiometric Measurements |
title_full_unstemmed |
ProVal: A New Autonomous Profiling Float for High Quality Radiometric Measurements |
title_sort |
proval: a new autonomous profiling float for high quality radiometric measurements |
publisher |
Frontiers Media Sa |
publishDate |
2018 |
url |
https://archimer.ifremer.fr/doc/00585/69694/67579.pdf https://archimer.ifremer.fr/doc/00585/69694/67580.pdf https://doi.org/10.3389/fmars.2018.00437 https://archimer.ifremer.fr/doc/00585/69694/ |
long_lat |
ENVELOPE(90.000,90.000,-60.000,-60.000) ENVELOPE(71.083,71.083,-71.683,-71.683) ENVELOPE(-54.065,-54.065,49.700,49.700) |
geographic |
Austral Austral Ocean Indian Proval Southern Ocean Tilting |
geographic_facet |
Austral Austral Ocean Indian Proval Southern Ocean Tilting |
genre |
Austral Ocean Southern Ocean |
genre_facet |
Austral Ocean Southern Ocean |
op_source |
Frontiers In Marine Science (2296-7745) (Frontiers Media Sa), 2018-11 , Vol. 5 , N. 437 , P. 18p. |
op_relation |
https://archimer.ifremer.fr/doc/00585/69694/67579.pdf https://archimer.ifremer.fr/doc/00585/69694/67580.pdf doi:10.3389/fmars.2018.00437 https://archimer.ifremer.fr/doc/00585/69694/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.3389/fmars.2018.00437 |
container_title |
Frontiers in Marine Science |
container_volume |
5 |
_version_ |
1766364545748566016 |