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nr is the refractive index (SI unit: 1)
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κ, β, σs are absorption, extinction, and scattering coefficients, respectively (SI unit: 1/m) and are related by:
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T is the temperature (SI unit: K)
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Isotropic phase functions:
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Linear anisotropic phase functions:
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Polynomial anisotropic up to the 12th order:
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Henyey-Greenstein phase function:
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