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Proceedings Paper

Underwater polarization characteristics and their impact on water visibility
Author(s): Jing Zhou; Alberto Tonizzo; Alex Gilerson; Barry Gross; Fred Moshary; Sam Ahmed
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Paper Abstract

In this paper we examine the impact of measured underwater polarization characteristics on visibility. Underwater characteristics were measured both in the principal plane and outside the principal plane, with data collected during several cruises in the Chesapeake/Virginia and New York Harbor/Hudson River areas using a multi-angular hyperspectral sensor system. This system, recently developed by us, consists of three hyperspectral Satlantic radiance sensors, each with a polarizer positioned in front of it, and with polarization axes aligned at 0, 90 and 45 deg. Underwater measurements are made with scattering angles from 0-180 degrees with respect to the solar illumination. At the same time as the hyperspectral measurements are made, the inherent optical properties such as absorption and attenuation were also recorded. The waters studied varied from clear open ocean water with attenuation of less than 0.25m-1 at 550nm c (550), to turbid coastal waters with a c(550) of more than 4m-1. In order to examine the extent that polarization techniques can help to improve underwater visibility in these types of field conditions, we computed the related modulation transfer functions from the polarized field measurements, and included the examination of the impact of scattered polarized veiling light, inherent in the field data. Various water parameters are then explored to examine the impact of the polarization of the background light in the principal plane on underwater visibility.

Paper Details

Date Published: 20 April 2010
PDF: 9 pages
Proc. SPIE 7678, Ocean Sensing and Monitoring II, 76780J (20 April 2010); doi: 10.1117/12.851021
Show Author Affiliations
Jing Zhou, The City College of New York (United States)
Alberto Tonizzo, The City College of New York (United States)
Alex Gilerson, The City College of New York (United States)
Barry Gross, The City College of New York (United States)
Fred Moshary, The City College of New York (United States)
Sam Ahmed, The City College of New York (United States)

Published in SPIE Proceedings Vol. 7678:
Ocean Sensing and Monitoring II
Weilin (Will) Hou; Robert A. Arnone, Editor(s)

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