Statistics of Rain Attenuation



Millimeter frequency satellite links are prone to variations in

attenuation over a large range due to rain, more than 30 dB. This has

been considered to be caused by meteorological conditions. Statistical

distributions have been fit-to-data with little or no physical

insight. It is the purpose of this paper to show that the dynamic

variations are Ricean or Rayleigh type fading, caused by multipath

from the rain. This opens the possibility of exact distributions of

Doppler variations and of the recently studied rain fade slope, which

in the limit of heavy rain follows a Student’s t- distribution with

the Doppler spread as parameter. A new development in generalized

solution to the Rician case is also presented.
Effektiv start/slut dato01/09/2010 → …