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...
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Online Access: | https://aquila.usm.edu/fac_pubs/7564 https://doi.org/10.1364/AO.51.008324 |
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ftsouthmissispun:oai:aquila.usm.edu:fac_pubs-8731 2023-07-30T03:55:33+02:00 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 A. Ahmed, Sam 2012-12-10T08:00:00Z https://aquila.usm.edu/fac_pubs/7564 https://doi.org/10.1364/AO.51.008324 unknown The Aquila Digital Community https://aquila.usm.edu/fac_pubs/7564 https://doi.org/10.1364/AO.51.008324 Faculty Publications Life Sciences Marine Biology text 2012 ftsouthmissispun https://doi.org/10.1364/AO.51.008324 2023-07-15T18:46:39Z 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 Text Aerosol Robotic Network The University of Southern Mississippi: The Aquila Digital Community Long Island Long Island Sound ENVELOPE(-79.366,-79.366,54.800,54.800) Applied Optics 51 35 8324 |
institution |
Open Polar |
collection |
The University of Southern Mississippi: The Aquila Digital Community |
op_collection_id |
ftsouthmissispun |
language |
unknown |
topic |
Life Sciences Marine Biology |
spellingShingle |
Life Sciences Marine Biology Harmel, Tristan Gilerson, Alexander Tonizzo, Alberto Chowdhary, Jacek Weidemann, Alan Arnone, Robert A. Ahmed, Sam Polarization Impacts on the Water-Leaving Radiance Retrieval from Above-Water Radiometric Measurements |
topic_facet |
Life Sciences Marine Biology |
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 |
format |
Text |
author |
Harmel, Tristan Gilerson, Alexander Tonizzo, Alberto Chowdhary, Jacek Weidemann, Alan Arnone, Robert A. Ahmed, Sam |
author_facet |
Harmel, Tristan Gilerson, Alexander Tonizzo, Alberto Chowdhary, Jacek Weidemann, Alan Arnone, Robert A. 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 |
The Aquila Digital Community |
publishDate |
2012 |
url |
https://aquila.usm.edu/fac_pubs/7564 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 |
Faculty Publications |
op_relation |
https://aquila.usm.edu/fac_pubs/7564 https://doi.org/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 |
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1772816070116114432 |