Witaj Wmak.
Ciekawie piszesz.

> a solidna chmura potrafi stłumić sygnał o 40 dB

Skad masz info, jakis link?

Ja zwykle mowie o 15 dB (*), opierajac sie o:

Dirk Breynaert, Maximilien d.Oreye de Lantremange, Newtec
"Analysis of the bandwidth efficiency of DVB-S2 in
a typical data distribution network"

Pzdr.J.P.
____________________________________________________
http://www.gr.ssr.upm.es/docencia/grado/csat/materia
l/White%20Paper%20-%20Analysis%20of%20the%20bandwidt
h%20efficiency%20of%20DVB-S2.pdf

(*)
"It is also assumed that the 99.85% probability rain
margin is varying from site to site, between 2.5 and
5.5 dB (these values don't represent heavy rain area's,
where values can go up to for example 15 dB)."