Multiangular hyperspectral polarimetric observations in coastal waters
Item
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Title
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Multiangular hyperspectral polarimetric observations in coastal waters
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Identifier
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d_2009_2013:11e21a9b758a:10386
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identifier
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10594
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Creator
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Tonizzo, Alberto,
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Contributor
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Sam Ahmed | Alex Gilerson
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Date
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2010
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Language
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English
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Publisher
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City University of New York.
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Subject
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Remote sensing | Optics | Ocean | Polarization | Radiative Transfer
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Abstract
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The objectives of this study are: (1) investigate the geometrical and spectral properties of the underwater polarized light field, in various atmospheric conditions and water compositions, but focusing mostly on coastal regions. This requires the development of suitable in situ instrumentation, to validate existing polarized radiative transfer models. (2) Correlate polarized radiance to the properties of the water components, i.e. inherent optical properties (IOPs), concentrations, size distributions, refractive indices, etc.;With this work we set out to fill the gaps in previous studies to obtain a comprehensive understanding of the changes that occur in the polarized light in coastal and open ocean iv waters. Unlike previous multiband instruments, we will obtain underwater angularly resolved hyperspectral measurements of the degree of polarization (DOP) in coastal and open ocean environments illustrating how the variability of the DOP is connected to water constituents. In particular, we will propose a method to estimate particles' composition from the DOP of the water -- leaving radiance. Measurements were also taken in different atmospheric conditions, to observe the effects of diffuse light, rather than direct sun light on the DOP. Finally, we assess the consistency between our measurements and theoretical polarized radiative transfer models regarding the influence of marine particles on the polarized signal with particular emphasis on the corresponding wavelength and angular dependence.
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Type
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dissertation
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Source
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2009_2013.csv
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degree
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Ph.D.
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Program
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Engineering
