Ocean inherent optical property estimation from irradiances
Applied Optics, Vol. 36, Issue 33, pp. 8685-8698 (1997)
http://dx.doi.org/10.1364/AO.36.008685
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Abstract
A method is evaluated for estimating the absorption coefficient a and the backscattering coefficient b_{b} from measurements of the upward and downward irradiances E_{u}(z) and E_{d}(z). With this method, the reflectance ratio R(z) and the downward diffuse attenuation coefficient K_{d}(z) obtained from E_{u}(z) and E_{d}(z) are used to estimate the inherent optical properties R_{∞} and K_{∞} that are the asymptotic values of R(z) and K_{d}(z), respectively. For an assumed scattering phase function β˜, there are unique correlations between the values of R_{∞} and K_{∞} and those of a and b_{b} that can be derived from the radiative transfer equation. Good estimates of a and the Gordon parameter G = b_{b}/(a + b_{b}) can be obtained from R_{∞} and K_{∞} if the true scattering phase function is not greatly different from the assumed function. The method works best in deep, homogeneous waters, but can be applied to some cases of stratified waters. To improve performance in shallow waters where bottom effects are important, the deep- and shallow-measurement reflectance models also are developed.
© 1997 Optical Society of America
Citation
Robert A. Leathers and Norman J. McCormick, "Ocean inherent optical property estimation from irradiances," Appl. Opt. 36, 8685-8698 (1997)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-36-33-8685
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