Angular structure of underwater light field: Importance for ocean color models

Shubha Sathyendranath; Trevor Platt

doi:10.1117/12.266459

6 February 1997 Angular structure of underwater light field: Importance for ocean color models

Shubha Sathyendranath, Trevor Platt

Proceedings Volume 2963, Ocean Optics XIII; (1997) https://doi.org/10.1117/12.266459
Event: Ocean Optics XIII, 1996, Halifax, Nova Scotia, Canada

Abstract

A simple analytical solution for reflectance at the sea surface is presented. The form of this analytical solution is similar to many earlier solutions, in that reflectance depends on the ratio of b_b to (a + b_b). But it brings out explicitly the role of the zenith angular distribution of the underwater light field in modifying reflectance, through the quantities (mu) _d and (mu) _u, which determine the mean path lengths of downwelling and upwelling photons, respectively, per unit vertical excursion. The solution also shows that reflectance depends on the shape of the phase function for scattering. The analytic solution is compared with the results of Monte Carlo simulations to establish its limits of applicability. Limitations of the model when multiple-scattering effects become important, and some possible modifications to the model to deal with such cases, are discussed.

Citation Download Citation

Shubha Sathyendranath and Trevor Platt "Angular structure of underwater light field: Importance for ocean color models", Proc. SPIE 2963, Ocean Optics XIII, (6 February 1997); https://doi.org/10.1117/12.266459

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