[Hallicrafters] Snow / Antenna question.

[jeremy-ca]

The natural resonance of rain is close to the 10 GHz ham band. Using a 
distant rain storm as a passive reflector has been done for decades.

It is also a reason why microwave links are generally not sited over water. 
The rising vapor/mists make a great absorber.

Carl
KM1H


----- Original Message ----- 
From: "Robert Nickels" <w9ran at oneradio.net>
To: "Bill Gerhold" <k2wh at optonline.net>
Cc: <hallicrafters at mailman.qth.net>
Sent: Saturday, February 02, 2008 9:58 PM
Subject: Re: [Hallicrafters] Snow / Antenna question.


> Bill Gerhold wrote:
>> The absorption of RF by snow or ice is negligible.
>>
> At HF it it's so small as to be neglibible, but at microwave or higher 
> frequencies, absorption by molecular resonance in the atmosphere (mostly 
> water and oxygen) is a major factor in radio propagation.  Ask anyone with 
> Dish or DirectTV.
>
> 73, Bob W9RAN
> ______________________________________________________________
>