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[TowerTalk] Snow and rain attenuation

To: <>
Subject: [TowerTalk] Snow and rain attenuation
From: "Robert Chudek" <>
Date: Mon, 31 Oct 2005 13:37:46 -0600
List-post: <>
Hi Bill,

The rain and snow attenuation seems to always raise this type of question. At 
the opposite end of the spectrum (440 MHz) where I ran ATV, snow and rain did 
not have a perceptible influence on the signals either. What did influence the 
path was foliage. In the winter we could shoot signals through the trees, but 
in the summer there was severe attenuation. I suspected the issue was the water 
or sap rising during the growing season.

But that aside, is there a frequency where rain and snow have a significant 
attenuation due to its presence in the path?

73 de Bob - K0RC

Message: 9
Date: Mon, 31 Oct 2005 11:12:08 -0800 (GMT-08:00)
From: Bill Jackson <>
Subject: Re: [TowerTalk] Snow and rain attenuation
To: Dan Hearn <>, "Towertalk@Contesting.Com"

Content-Type: text/plain; charset=us-ascii


I work with 6 GHz point to point microwave systems at the railroad.  We do not 
use heated antennas or radomes.  However, I would recommend you install a dish 
antenna that includes a fiberglass radome.  This will keep ice and snow from 
forming on the feedhorn and reflective surface of the dish and will actually 
lower the amount of wind loading from the antenna. 

At 6 GHz, the amount of additional path attenuation due to falling rain/snow in 
the air at 6 GHz is negligible and should not be a concern.

73 de Bill, K9RZ  


See:  for "Self Supporting Towers", "Wireless Weather 
Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions 
and ask for Sherman, W2FLA.

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