Title

Monitoring Water Transparency and Diver Visibility in Ports and Harbors Using Aircraft Hyperspectral Remote Sensing

Author Info

Charles C. Trees, San Diego State University
Paul W. Bissett, Florida Environmental Research Institute
Heidi Dierssen, University of Connecticut
David D.R. Kohler, Florida Environmental Research Institute
Mark A. Moline, California Polytechnic State University - San Luis ObispoFollow
James L. Mueller, San Diego State University
Richard E. Pieper, California State University - Long Beach
Michael S. Twardowski, WET Labs, Inc.
J. Ronald V. Zaneveld, WET Labs Inc.

Recommended Citation

Published in Proceedings of SPIE: Remote Sensing of Submerged Threats, Volume 5780, March 29, 2005, pages 91-98.

The definitive version is available at https://doi.org/10.1117/12.607554.

Abstract

Diver visibility analyses and predictions, and water transparency in general, are of significant military and commercial interest. This is especially true in our current state, where ports and harbors are vulnerable to terrorist attacks from a variety of platforms both on and below the water (swimmers, divers, AUVs, ships, submarines, etc.). Aircraft hyperspectral imagery has been previously used successfully to classify coastal bottom types and map bathymetry and it is time to transition this observational tool to harbor and port security. Hyperspectral imagery is ideally suited for monitoring small-scale features and processes in these optically complex waters, because of its enhanced spectral (1-3 nm) and spatial (1-3 meters) resolutions. Under an existing NOAA project (CICORE), a field experiment was carried out (November 2004) in coordination with airborne hyperspectral ocean color overflights to develop methods and models for relating hyperspectral remote sensing reflectances to water transparency and diver visibility in San Pedro and San Diego Bays. These bays were focused areas because: (1) San Pedro harbor, with its ports of Los Angeles and Long Beach, is the busiest port in the U.S. and ranks 3rd in the world and (2) San Diego Harbor is one of the largest Naval ports, serving a diverse mix of commercial, recreational and military traffic, including more than 190 cruise ships annual. Maintaining harbor and port security has added complexity for these Southern California bays, because of the close proximity to the Mexican border. We will present in situ optical data and hyperspectral aircraft ocean color imagery from these two bays and compare and contrast the differences and similarities. This preliminary data will then be used to discuss how water transparency and diver visibility predictions improve harbor and port security.

Disciplines

Biology

Copyright

2005 Society of Photo-Optical Instrumentation Engineers.

Publisher statement

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