[Wswss] Fw: Re: [VHF] 1296 MHz/QST

[k6tsk at juno.com]

Hi Ace, pass this on to Ted if you would please.

73 Ralph



--------- Forwarded message ----------
From: Vhfrover <vhfrover at aol.com>
To: n9tzl at owc.net, vhf at w6yx.stanford.edu
Date: Wed, 9 May 2012 17:51:36 -0400 (EDT)
Subject: Re: [VHF] 1296 MHz/QST
Message-ID: <8CEFC4509FAA52A-2B80-1D952 at webmail-d168.sysops.aol.com>
References:
<1856433821.885761336597789000.JavaMail.root at ozcn1.owcdns.net>
 
Hi Dennis,
The National Weather Service operates its 159 or so WSR-88D NEXRAD
stations in
the 1.2 to 1.5 GHz (23cm) L-Band that are spread out across the USA with
the
largest concentration east of the Mississippi. These stations detect
precipitation and this is the weather radar that we are used to seeing on
TV
broadcasts. They also use 10.7cm and 5.4cm for precipitation detection.
 
The National Air Route Surveillance Radar Network also uses the 21.4 to
24.7cm
band for their ASR-4, ASR-5 and ASR-6 stations.  These are very
high-power
(i.e. 65kW peak) output with antennas with about +35dB gain.  This is
about
205million Watts peak! The approximately 40 locations of these stations
are
around the perimeter of the continental United States.
 
Even with being located relatively close to O'Hare and Romeoville, IL
(closest
NEXRAD to Chicago), I have not heard of anyone in the local Chicagoland
area
being interfered with from these stations but it sounds like they are
asking
to be protected from amateur radio signals.
 
73
Mike WB8BZK