研究目的
Investigating the influence of shadowing of some wavy regions by other wavy regions on the formation of an image of Snell’s window.
研究成果
The shadowing of some wavy regions by other wavy regions significantly influences the structure of Snell’s window, especially for wind velocities above 5 m/s. The study provides an updated algorithm for estimating the surface-slope variance from the blurring of Snell’s window boundary, which should ensure a more exact solution of the inverse problem. However, the coefficients of the equation for solving the inverse problem may vary with different wave spectra and actual illumination conditions.
研究不足
The model assumes single scattering and ignores the contribution from water-scattered light to the field. The study also notes that the actual illumination conditions and two-dimensional waves could further influence the results, suggesting areas for future optimization.
1：Experimental Design and Method Selection:
The study uses numerical simulation to model the effect of shadowing on the image of Snell’s window. The theoretical model includes the Smith shadow function to account for shadowing effects.
2：Sample Selection and Data Sources:
The study simulates the relief of the wavy sea surface using the superposition of plane waves with random phases and amplitudes derived from the spatial spectrum of wave elevation.
3：List of Experimental Equipment and Materials:
Numerical simulation tools are used, with specific reference to the Naval Research Laboratory (NRL Model) spectrum for wave simulation.
4：Experimental Procedures and Operational Workflow:
The simulation involves calculating the brightness of the accumulated image of Snell’s window with and without allowance for shadowing, using the Smith shadow function.
5：Data Analysis Methods:
The study analyzes the influence of shadowing on the structure of Snell’s window and derives a corrected formula for estimating the water-surface slope variance from the blurring of the boundary of Snell’s window.
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