Obtaining Inherent Water Optical Properties From Apparent Water Optical Properties

W S Helliwell; S D Gasster

doi:10.1117/12.945705

12 August 1988 Obtaining Inherent Water Optical Properties From Apparent Water Optical Properties

W S Helliwell, S D Gasster

Proceedings Volume 0925, Ocean Optics IX; (1988) https://doi.org/10.1117/12.945705
Event: 1988 Technical Symposium on Optics, Electro-Optics, and Sensors, 1988, Orlando, FL, United States

Abstract

Modeling the radiative transfer in the ocean requires the volume absorption coefficient, a, and the volume scattering coefficient, b. These are generally not measured during ocean optical field experiments, rather one typically finds that the apparent optical properties are measured or at least derived from irradiance measurements. For modeling purposes it would be useful to be able to retrieve the inherent optical properties a and b from the measured apparent optical properties (Kd, RR and rw for example). We report here some preliminary investigations into a general method for obtaining a and b from the AOP, given the incident radiance distribution and the scattering phase function. The method uses the technique of nonlinear parameter estimation in conjunction with a finite difference discrete ordinate solution to the radiative transfer equation. The numerical radiative transfer solution is compared to previous work, and an attempt is made to obtain a and b from measured values of the diffuse attenuation coefficient and the water reflectivity. This technique includes all orders of scattering and is computationally efficient.

Citation Download Citation

W S Helliwell and S D Gasster "Obtaining Inherent Water Optical Properties From Apparent Water Optical Properties", Proc. SPIE 0925, Ocean Optics IX, (12 August 1988); https://doi.org/10.1117/12.945705

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