Cloud model

Recommendation P.840

“Attenuation due to Clouds and Fog”

• Maps of total columnar content of cloud liquid water

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• Rec. P.840 is the basic Rec dealing with cloud attenuation.

• Allows cloud attenuation to be calculated on a slant path, at a given elevation angle, as a function of the columnar water content in clouds for which global maps are provided in the Rec.