ProVal A profiling float dedicated to radiometric measurements
International audience In-situ high quality measurements of radiometric quantities are mandatory to enable a "system vicarious calibration" (SVC) of satellite sensors dedicated to Ocean Color Radiometry (OCR) as well as to validate their derived products. High density of acquisition is par...
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ftinsu:oai:HAL:hal-02542650v1 2024-04-28T08:39:25+00:00 ProVal A profiling float dedicated to radiometric measurements Leymarie, E. Penkerc'H, C Vellucci, V. Lerebourg, C Antoine, D Boss, E. Lewis, M Claustre, Hervé Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Analytic and Computational Research, Inc. - Earth Sciences (ACRI-ST) Service de Chimie des Procédés de Séparation (SCPS) Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Dubrovnik, Croatia 2018-10-07 https://hal.science/hal-02542650 https://hal.science/hal-02542650/document https://hal.science/hal-02542650/file/ProVal_OOXXIV.pdf en eng HAL CCSD hal-02542650 https://hal.science/hal-02542650 https://hal.science/hal-02542650/document https://hal.science/hal-02542650/file/ProVal_OOXXIV.pdf info:eu-repo/semantics/OpenAccess Ocean Optics XXIV https://hal.science/hal-02542650 Ocean Optics XXIV, Oct 2018, Dubrovnik, Croatia [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/conferenceObject Conference poster 2018 ftinsu 2024-04-05T00:42:49Z International audience In-situ high quality measurements of radiometric quantities are mandatory to enable a "system vicarious calibration" (SVC) of satellite sensors dedicated to Ocean Color Radiometry (OCR) as well as to validate their derived products. High density of acquisition is particularly critical during the early stages of an OCR satellite activity. The ProVal float measures downward irradiance and upwelling radiance at seven wavelengths on two arms that allow radiometer redundancy and shading mitigation. We analyzed more than 500 profiles sampled in the Southern Ocean and Mediterranean Sea to date. We find that 45% and 85% of data in the surface layer exhibit tilts lower than 10°in the Southern Ocean and Mediterranean Sea respectively. Floats deployed in the Mediterranean Sea were recovered allowing post-deployment calibrations of radiometers that confirmed the low sensor drift. In addition, platform shading, estimated from the difference between the two radiometers, shows good agreement with Monte-Carlo simulations. Finally, comparisons of Remote Sensing Reflectance with the OLCI sensor (Sentinel-3A) show results in agreement with other sources of in-situ data but with extended coverage capabilities. Conference Object Southern Ocean Institut national des sciences de l'Univers: HAL-INSU |
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Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Leymarie, E. Penkerc'H, C Vellucci, V. Lerebourg, C Antoine, D Boss, E. Lewis, M Claustre, Hervé ProVal A profiling float dedicated to radiometric measurements |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience In-situ high quality measurements of radiometric quantities are mandatory to enable a "system vicarious calibration" (SVC) of satellite sensors dedicated to Ocean Color Radiometry (OCR) as well as to validate their derived products. High density of acquisition is particularly critical during the early stages of an OCR satellite activity. The ProVal float measures downward irradiance and upwelling radiance at seven wavelengths on two arms that allow radiometer redundancy and shading mitigation. We analyzed more than 500 profiles sampled in the Southern Ocean and Mediterranean Sea to date. We find that 45% and 85% of data in the surface layer exhibit tilts lower than 10°in the Southern Ocean and Mediterranean Sea respectively. Floats deployed in the Mediterranean Sea were recovered allowing post-deployment calibrations of radiometers that confirmed the low sensor drift. In addition, platform shading, estimated from the difference between the two radiometers, shows good agreement with Monte-Carlo simulations. Finally, comparisons of Remote Sensing Reflectance with the OLCI sensor (Sentinel-3A) show results in agreement with other sources of in-situ data but with extended coverage capabilities. |
author2 |
Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Analytic and Computational Research, Inc. - Earth Sciences (ACRI-ST) Service de Chimie des Procédés de Séparation (SCPS) Commissariat à l'énergie atomique et aux énergies alternatives (CEA) |
format |
Conference Object |
author |
Leymarie, E. Penkerc'H, C Vellucci, V. Lerebourg, C Antoine, D Boss, E. Lewis, M Claustre, Hervé |
author_facet |
Leymarie, E. Penkerc'H, C Vellucci, V. Lerebourg, C Antoine, D Boss, E. Lewis, M Claustre, Hervé |
author_sort |
Leymarie, E. |
title |
ProVal A profiling float dedicated to radiometric measurements |
title_short |
ProVal A profiling float dedicated to radiometric measurements |
title_full |
ProVal A profiling float dedicated to radiometric measurements |
title_fullStr |
ProVal A profiling float dedicated to radiometric measurements |
title_full_unstemmed |
ProVal A profiling float dedicated to radiometric measurements |
title_sort |
proval a profiling float dedicated to radiometric measurements |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-02542650 https://hal.science/hal-02542650/document https://hal.science/hal-02542650/file/ProVal_OOXXIV.pdf |
op_coverage |
Dubrovnik, Croatia |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Ocean Optics XXIV https://hal.science/hal-02542650 Ocean Optics XXIV, Oct 2018, Dubrovnik, Croatia |
op_relation |
hal-02542650 https://hal.science/hal-02542650 https://hal.science/hal-02542650/document https://hal.science/hal-02542650/file/ProVal_OOXXIV.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1797570453486698496 |