Cloud attenuation

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cloud attenuation


For the centimeter wavelength band, clouds produce Rayleigh scattering. The attenuation is due largely to scattering, rather than absorption, for both ice and water clouds. The cloud attenuation for one-way transmission is
ams2001glos-Ce20
where M (g m-3) is the liquid water content, ρ (g cm-3) the density of water, λ the wavelength, and
ams2001glos-Cex03
, where m2 is the complex dielectric constant. The attenuation depends only on M, and in the range of wavelengths from 1 to 10 cm is approximately (1 to 100) × 10-2M for water clouds, and (2 to 20) × 10-2M for ice clouds.

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