Abstract
The ray-by-ray integration technique is applied to investigate the effect of the phase interference between rays on the scattering phase functions and backscattering cross sections of pristine hexagonal ice plates and columns with specific orientations. Numerical computations are carried out at 0.532 and 1.064 µm wavelengths. The results demonstrate that strong fluctuations of the phase function as a function of scattering angle are inherent for oriented particles. In addition, constructive fluctuation patterns are noted for particle backscattering cross sections, and are a function of particle size. These fluctuations, which are absent from the conventional ray-tracing computations, are caused by phase interference.
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