$Accurate Refraction Correction—Assisted Bathymetric Inversion Using ICESat-2 and Multispectral Data$
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Accurate Refraction Correction—Assisted Bathymetric Inversion Using ICESat-2 and Multispectral Data

Shallow-water depth information is essential for ship navigation and fishery farming. However, the accurate acquisition of shallow-water depth has been a challenge for marine mapping. Combining Ice, Cloud, and Land Elevation Satellite-2 (ICESat-2) bathymetry data with multispectral data, satellite-d...

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Autores principales:	Changda Liu, Jiawei Qi, Jie Li, Qiuhua Tang, Wenxue Xu, Xinghua Zhou, Wenjun Meng
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	ICESat-2 multispectral data refraction correction sea-surface undulations satellite-derived bathymetry Science Q
Acceso en línea:	https://doaj.org/article/d65d0258f87b4df18818b59eaea00c64
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spelling	oai:doaj.org-article:d65d0258f87b4df18818b59eaea00c642021-11-11T18:54:35ZAccurate Refraction Correction—Assisted Bathymetric Inversion Using ICESat-2 and Multispectral Data10.3390/rs132143552072-4292https://doaj.org/article/d65d0258f87b4df18818b59eaea00c642021-10-01T00:00:00Zhttps://www.mdpi.com/2072-4292/13/21/4355https://doaj.org/toc/2072-4292Shallow-water depth information is essential for ship navigation and fishery farming. However, the accurate acquisition of shallow-water depth has been a challenge for marine mapping. Combining Ice, Cloud, and Land Elevation Satellite-2 (ICESat-2) bathymetry data with multispectral data, satellite-derived bathymetry is a promising solution through which to obtain bathymetric information quickly and accurately. This study proposes a photon refraction correction method considering sea-surface undulations to address errors in the underwater photons obtained by the ICESat-2. First, the instantaneous sea surface and beam emission angle are integrated to determine the sea-surface incidence angle. Next, the distance of photon propagation in water is determined using sea-surface undulation and Snell’s law. Finally, position correction is performed through geometric relationships. The corrected photons were combined with the multispectral data for bathymetric inversion, and a bathymetric map of the Yongle Atoll area was obtained. A bathymetric chart was created using the corrected photons and the multispectral data in the Yongle Atoll. Comparing the results of different refraction correction methods with the data measured shows that the refraction correction method proposed in this paper can effectively correct bathymetry errors: the root mean square error is 1.48 m and the R2 is 0.86.Changda LiuJiawei QiJie LiQiuhua TangWenxue XuXinghua ZhouWenjun MengMDPI AGarticleICESat-2multispectral datarefraction correctionsea-surface undulationssatellite-derived bathymetryScienceQENRemote Sensing, Vol 13, Iss 4355, p 4355 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	ICESat-2 multispectral data refraction correction sea-surface undulations satellite-derived bathymetry Science Q
spellingShingle	ICESat-2 multispectral data refraction correction sea-surface undulations satellite-derived bathymetry Science Q Changda Liu Jiawei Qi Jie Li Qiuhua Tang Wenxue Xu Xinghua Zhou Wenjun Meng Accurate Refraction Correction—Assisted Bathymetric Inversion Using ICESat-2 and Multispectral Data
description	Shallow-water depth information is essential for ship navigation and fishery farming. However, the accurate acquisition of shallow-water depth has been a challenge for marine mapping. Combining Ice, Cloud, and Land Elevation Satellite-2 (ICESat-2) bathymetry data with multispectral data, satellite-derived bathymetry is a promising solution through which to obtain bathymetric information quickly and accurately. This study proposes a photon refraction correction method considering sea-surface undulations to address errors in the underwater photons obtained by the ICESat-2. First, the instantaneous sea surface and beam emission angle are integrated to determine the sea-surface incidence angle. Next, the distance of photon propagation in water is determined using sea-surface undulation and Snell’s law. Finally, position correction is performed through geometric relationships. The corrected photons were combined with the multispectral data for bathymetric inversion, and a bathymetric map of the Yongle Atoll area was obtained. A bathymetric chart was created using the corrected photons and the multispectral data in the Yongle Atoll. Comparing the results of different refraction correction methods with the data measured shows that the refraction correction method proposed in this paper can effectively correct bathymetry errors: the root mean square error is 1.48 m and the R2 is 0.86.
format	article
author	Changda Liu Jiawei Qi Jie Li Qiuhua Tang Wenxue Xu Xinghua Zhou Wenjun Meng
author_facet	Changda Liu Jiawei Qi Jie Li Qiuhua Tang Wenxue Xu Xinghua Zhou Wenjun Meng
author_sort	Changda Liu
title	Accurate Refraction Correction—Assisted Bathymetric Inversion Using ICESat-2 and Multispectral Data
title_short	Accurate Refraction Correction—Assisted Bathymetric Inversion Using ICESat-2 and Multispectral Data
title_full	Accurate Refraction Correction—Assisted Bathymetric Inversion Using ICESat-2 and Multispectral Data
title_fullStr	Accurate Refraction Correction—Assisted Bathymetric Inversion Using ICESat-2 and Multispectral Data
title_full_unstemmed	Accurate Refraction Correction—Assisted Bathymetric Inversion Using ICESat-2 and Multispectral Data
title_sort	accurate refraction correction—assisted bathymetric inversion using icesat-2 and multispectral data
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/d65d0258f87b4df18818b59eaea00c64
work_keys_str_mv	AT changdaliu accuraterefractioncorrectionassistedbathymetricinversionusingicesat2andmultispectraldata AT jiaweiqi accuraterefractioncorrectionassistedbathymetricinversionusingicesat2andmultispectraldata AT jieli accuraterefractioncorrectionassistedbathymetricinversionusingicesat2andmultispectraldata AT qiuhuatang accuraterefractioncorrectionassistedbathymetricinversionusingicesat2andmultispectraldata AT wenxuexu accuraterefractioncorrectionassistedbathymetricinversionusingicesat2andmultispectraldata AT xinghuazhou accuraterefractioncorrectionassistedbathymetricinversionusingicesat2andmultispectraldata AT wenjunmeng accuraterefractioncorrectionassistedbathymetricinversionusingicesat2andmultispectraldata
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Accurate Refraction Correction—Assisted Bathymetric Inversion Using ICESat-2 and Multispectral Data

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