Using Multi-Angle WorldView-2 Imagery to Determine Ocean Depth Near Oahu, Hawaii
Lee, Krista R.
Olsen, Richard C.
Kruse, Fred A.
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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 DigitalGlobes 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 and Green combination provided the best results.
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Lee, Krista R.; Olsen, Richard C.; Kruse, Fred A.; Kim, Angela M. (SPIE, 2013);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 DigitalGlobeÃ Ã Â¢ s WorldView-2 (WV-2) ...
Loomis, Michael J. (Monterey, California. Naval Postgraduate School, 2009-03);The Worldview-2 satellite, scheduled for launch in 2009, will have a multispectral sensor with several additional spectral bands not available on current multispectral sensors. This research investigates the use of the ...
Lee, Krista R.; Kim, Angela M.; Olsen, R.C.; Kruse, Fred A. (SPIE, 2011);Observations taken from DigitalGlobeâ s WorldView-2 (WV-2) sensor were analyzed for bottom-type and bathymetry for data taken at Guam and Tinian in late February and early March of 2010. Classification of bottom type was ...