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
Date: Mon, 31 Oct 2005 11:12:08 -0800 (GMT-08:00)
From: Bill Jackson <email@example.com>
Subject: Re: [TowerTalk] Snow and rain attenuation
To: Dan Hearn <firstname.lastname@example.org>, "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: http://www.mscomputer.com 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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