The calculations of multiple scattering of polarized infrared radiation by horizontally oriented ice crystals in a paper by Takano and Liou [ J. Opt. Soc. Am. A 10, 1243 ( 1993)] are based on a vector radiative transfer equation that is not rigorous but rather should be considered approximate. Specifically, Takano and Liou use the scalar extinction coefficient instead of the 4 × 4 extinction matrix. Therefore additional computations based on the rigorous radiative transfer equation are necessary for ascertaining the accuracy of Takano and Liou’s radiative transfer calculations. Also, contrary to the statement of Takano and Liou, the reciprocity relation for the phase matrix holds for any anisotropic scattering media, including horizontally oriented ice crystals.
© 1994 Optical Society of AmericaFull Article | PDF Article
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