Discussion
Why does a wet radome degrade a satellite link disproportionately?
Answer: A
A continuous film of water absorbs strongly and reflects part of the wave, adding several decibels of loss precisely when rain attenuation on the path is already high. Hydrophobic coatings and heaters are used to break the film up. The focal length is a geometric property of the reflector, no short circuit occurs, and physical temperature is not the mechanism. The two losses coinciding is what makes the outage statistics worse than either alone would suggest.
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