Particle distributions and index of refraction estimation for Canadian waters

J. Luc Forand; Georges R. Fournier

doi:10.1117/12.366486

28 October 1999 Particle distributions and index of refraction estimation for Canadian waters

J. Luc Forand, Georges R. Fournier

Proceedings Volume 3761, Airborne and In-Water Underwater Imaging; (1999) https://doi.org/10.1117/12.366486
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

Extensive measurements were carried out of the optical properties of seawater off the East and West Coasts of Canada using a full-spectrum near-forward angle nephelometer (NEARSCAT). Using a new phase function adapted specifically to scattering from water borne particles, we analyze the data from coastal waters in the Straits of Juan de Fuca and in the Gulf of St. Lawrence. We show explicitly how the spectral properties can be combined with the angular properties to more reliably extract the Junge exponent of the particle size distribution and the mean index of refraction of the particles. We obtain a simple analytic expression for the normalized cumulative phase function that can be used to compute the backscatter ratio, and its explicit wavelength dependence. Accurate estimation of this wavelength dependence is required for accurate hyperspectral image prediction.

Citation Download Citation

J. Luc Forand and Georges R. Fournier "Particle distributions and index of refraction estimation for Canadian waters", Proc. SPIE 3761, Airborne and In-Water Underwater Imaging, (28 October 1999); https://doi.org/10.1117/12.366486

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