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The effect of angular structure differences between measured and best-fit analytical phase functions of the equivalent backscattering ratio on calculated reflectance values was studied and shown to be significant. We used a Monte Carlo radiative transfer code to check the effect of choosing different analytical (several Fournier-Forand (1994) and Henyey-Greenstein (1941)) phase functions with backscattering ratios identical to the "classical" average Petzold function. We show that the additional variability of the resulting water leaving radiance is about 7% (4% between the Fournier-Forand functions themselves) for most scenarios. We also show a previously unknown maximum of the discrepancy (up to 10%) for highly scattering waters. We discuss the importance of relative differences in phase function for different angular ranges to this maximum and to the behaviour of the discrepancy as a function of solar zenith angle.
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Tom
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29--38
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Bibliogr. 21 poz., wykr.
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Bibliografia
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- 17.Piskozub J., 1994, Effects of surface waves and sea-bottom on self-shading on in-water optical instruments, Ocean Optics XII, J. Jaffe (ed.), Proc. SPIE, 2258, 300-308.
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Bibliografia
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bwmeta1.element.baztech-article-BUS8-0018-0064