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Accession Number
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ADA567694
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Title
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Using Multi-Angle WorldView-2 Imagery to Determine Ocean Depth Near Oahu, Hawaii.
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Publication Date
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Sep 2012
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Media Count
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117p
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Personal Author
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K. R. Lee
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Abstract
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Multispectral imaging (MSI) data collected at multiple angles over shallow water provide analysts with a unique perspective of bathymetry in coastal areas. Observations taken by DigitalGlobe's WorldView-2 (WV-2) sensor acquired at 39 different view angles on 30 July 2011 were used to determine the effect of acquisition angle on derived depth. The site used for this study was on the island of Oahu, focused on Kailua Bay (on the windward side of the island). Satellite azimuth and elevation for these data ranged from 18.8 to 185.8 degrees and 24.9 (forward-looking) to 24.5 (backward-looking) degrees (respectively) with 90 degrees representing a nadir view. Bathymetry were derived directly from the WV-2 radiance data using a band ratio approach. Comparison of results to LiDAR-derived bathymetry showed that varying view angle impact the quality of the inferred bathymetry. Derived and reference bathymetry have a higher correlation as images are acquired closer to nadir. The band combination utilized for depth derivation also has an effect on derived bathymetry. Four band combinations were compared, and the Blue & Green combination provided the best results.
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Keywords
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Atmospheric scattering
Bathymetry
Coastal regions
Detectors
Electromagnetic spectra
Hawaii
Multispectral
Optical properties
Radiative transfer
Scattering
Shallow water
Theses
Wind direction
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Source Agency
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Non Paid ADAS
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NTIS Subject Category
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47C - Physical & Chemical Oceanography
47B - Dynamic Oceanography
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Corporate Author
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Naval Postgraduate School, Monterey, CA.
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Document Type
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Thesis
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Title Note
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Master's thesis.
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NTIS Issue Number
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1309
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Contract Number
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N/A
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