[NLRS] Might be of some interest to some -- ND Radar upgrade

[Dr. Gerald N. Johnson]

A fundamental problem is that its likely a phased array radar where each 
receiver element has very little directivity or RF filtering, so its 
susceptible to RF from a wide range of frequencies and a hemisphere of 
space. If each receiver element had selectivity, then they would have to 
be matched for phase so the variable phase used for direction would 
work. There has been much hassling of 432 and 440 ham operations in 
Massachusetts because of PavePaws.

FCC rules prohibit more than 50 watts PEP output within 100 miles of 
Concrete ND (48:43N, 97.54W) without coordination with the FCC and the 
military. Foot note US7 in FCC rules part 2, paragraph 2.106, referred 
to by part 97.313.

73, Jerry, K0CQ

On 9/2/2015 9:30 AM, Barry Malowanchuk wrote:
>
>
> Thanks for posting this Bill.  It does not seem like they are making any real changes to the operation, however the comment about making it the most powerfull of 5 such installations is a bit concerning.  This radar operates at about 433 MHz and is basically pointed over our heads in Winnipeg.  When tropo conditions are up in the valley it can be a powerfull signal when I point over that way.   Unfortunately I point through it to talk to Dennis NT0V.
>
> About 10 or 15 years ago I got an SWL report through the Governments, and was told that I should reduce power so as to avoid interference....or I might be forced to cease and desist.  They were complaining about interference from everything in the band ( FM, ATV, commercial stuff in the 420-430)...of course I had the highest ERP signal :-)
>
> Best 73
> Barry VE4MA
>
> -----Original Message-----
> From: NLRS [mailto:nlrs-bounces at mailman.qth.net] On Behalf Of Bill Davis via NLRS
> Sent: Tuesday, September 01, 2015 10:43 AM
> To: NLRS Post
> Subject: [NLRS] Might be of some interest to some -- ND Radar upgrade
>
>
>
> http://www.grandforksherald.com/news/business/3829249-cavalier-air-force-station-seeing-multi-million-upgrades
>
>
> 73  Bill  K0AWU
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