Polarization impacts on the water-leaving radiance retrieval from above-water radiometric measurements
Above-water measurements of water-leaving radiance are widely used for water-quality monitoring and ocean-color satellite data validation. Reflected skylight in above-water radiometry needs to be accurately estimated prior to derivation of water-leaving radiance. Up-to-date methods to estimate refle...
Published in: | Applied Optics |
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Format: | Article in Journal/Newspaper |
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Online Access: | https://hal.science/hal-03502652 https://doi.org/10.1364/AO.51.008324 |
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ftinsu:oai:HAL:hal-03502652v1 2024-02-11T09:54:46+01:00 Polarization impacts on the water-leaving radiance retrieval from above-water radiometric measurements Harmel, Tristan Gilerson, Alexander Tonizzo, Alberto Chowdhary, Jacek Weidemann, Alan Arnone, Robert Ahmed, Sam Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) NASA Goddard Institute for Space Studies (GISS) NASA Goddard Space Flight Center (GSFC) 2012 https://hal.science/hal-03502652 https://doi.org/10.1364/AO.51.008324 en eng HAL CCSD Optical Society of America info:eu-repo/semantics/altIdentifier/doi/10.1364/AO.51.008324 hal-03502652 https://hal.science/hal-03502652 doi:10.1364/AO.51.008324 ISSN: 1559-128X EISSN: 2155-3165 Applied optics https://hal.science/hal-03502652 Applied optics, 2012, 51 (35), pp.8324-8340. ⟨10.1364/AO.51.008324⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2012 ftinsu https://doi.org/10.1364/AO.51.008324 2024-01-24T17:30:24Z Above-water measurements of water-leaving radiance are widely used for water-quality monitoring and ocean-color satellite data validation. Reflected skylight in above-water radiometry needs to be accurately estimated prior to derivation of water-leaving radiance. Up-to-date methods to estimate reflection of diffuse skylight on rough sea surfaces are based on radiative transfer simulations and sky radiance measurements. But these methods neglect the polarization state of the incident skylight, which is generally highly polarized. In this paper, the effects of polarization on the sea surface reflectance and the subsequent water-leaving radiance estimation are investigated. We show that knowledge of the polarization field of the diffuse skylight significantly improves above-water radiometry estimates, in particular in the blue part of the spectrum where the reflected skylight is dominant. A newly developed algorithm based on radiative transfer simulations including polarization is described. Its application to the standard Aerosol Robotic Network-Ocean Color and hyperspectral radiometric measurements of the 1.5-year dataset acquired at the Long Island Sound site demonstrates the noticeable importance of considering polarization for water-leaving radiance estimation. In particular it is shown, based on time series of collocated data acquired in coastal waters, that the azimuth range of measurements leading to good-quality data is significantly increased, and that these estimates are improved by more than 12% at 413 nm. Full consideration of polarization effects is expected to significantly improve the quality of the field data utilized for satellite data validation or potential vicarious calibration purposes. (c) 2012 Optical Society of America Article in Journal/Newspaper Aerosol Robotic Network Institut national des sciences de l'Univers: HAL-INSU Long Island Long Island Sound ENVELOPE(-79.366,-79.366,54.800,54.800) Applied Optics 51 35 8324 |
institution |
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 Harmel, Tristan Gilerson, Alexander Tonizzo, Alberto Chowdhary, Jacek Weidemann, Alan Arnone, Robert Ahmed, Sam Polarization impacts on the water-leaving radiance retrieval from above-water radiometric measurements |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
Above-water measurements of water-leaving radiance are widely used for water-quality monitoring and ocean-color satellite data validation. Reflected skylight in above-water radiometry needs to be accurately estimated prior to derivation of water-leaving radiance. Up-to-date methods to estimate reflection of diffuse skylight on rough sea surfaces are based on radiative transfer simulations and sky radiance measurements. But these methods neglect the polarization state of the incident skylight, which is generally highly polarized. In this paper, the effects of polarization on the sea surface reflectance and the subsequent water-leaving radiance estimation are investigated. We show that knowledge of the polarization field of the diffuse skylight significantly improves above-water radiometry estimates, in particular in the blue part of the spectrum where the reflected skylight is dominant. A newly developed algorithm based on radiative transfer simulations including polarization is described. Its application to the standard Aerosol Robotic Network-Ocean Color and hyperspectral radiometric measurements of the 1.5-year dataset acquired at the Long Island Sound site demonstrates the noticeable importance of considering polarization for water-leaving radiance estimation. In particular it is shown, based on time series of collocated data acquired in coastal waters, that the azimuth range of measurements leading to good-quality data is significantly increased, and that these estimates are improved by more than 12% at 413 nm. Full consideration of polarization effects is expected to significantly improve the quality of the field data utilized for satellite data validation or potential vicarious calibration purposes. (c) 2012 Optical Society of America |
author2 |
Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) NASA Goddard Institute for Space Studies (GISS) NASA Goddard Space Flight Center (GSFC) |
format |
Article in Journal/Newspaper |
author |
Harmel, Tristan Gilerson, Alexander Tonizzo, Alberto Chowdhary, Jacek Weidemann, Alan Arnone, Robert Ahmed, Sam |
author_facet |
Harmel, Tristan Gilerson, Alexander Tonizzo, Alberto Chowdhary, Jacek Weidemann, Alan Arnone, Robert Ahmed, Sam |
author_sort |
Harmel, Tristan |
title |
Polarization impacts on the water-leaving radiance retrieval from above-water radiometric measurements |
title_short |
Polarization impacts on the water-leaving radiance retrieval from above-water radiometric measurements |
title_full |
Polarization impacts on the water-leaving radiance retrieval from above-water radiometric measurements |
title_fullStr |
Polarization impacts on the water-leaving radiance retrieval from above-water radiometric measurements |
title_full_unstemmed |
Polarization impacts on the water-leaving radiance retrieval from above-water radiometric measurements |
title_sort |
polarization impacts on the water-leaving radiance retrieval from above-water radiometric measurements |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.science/hal-03502652 https://doi.org/10.1364/AO.51.008324 |
long_lat |
ENVELOPE(-79.366,-79.366,54.800,54.800) |
geographic |
Long Island Long Island Sound |
geographic_facet |
Long Island Long Island Sound |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
ISSN: 1559-128X EISSN: 2155-3165 Applied optics https://hal.science/hal-03502652 Applied optics, 2012, 51 (35), pp.8324-8340. ⟨10.1364/AO.51.008324⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1364/AO.51.008324 hal-03502652 https://hal.science/hal-03502652 doi:10.1364/AO.51.008324 |
op_doi |
https://doi.org/10.1364/AO.51.008324 |
container_title |
Applied Optics |
container_volume |
51 |
container_issue |
35 |
container_start_page |
8324 |
_version_ |
1790602599856078848 |