Topband: Followup on the 1915kHz radar signal

[Don Kirk]

Hi Doug,

Thanks for the follow up.  I was saying 70 to 75 degrees, and 70 degrees
from my location puts me right where the W1FV 75 degree line passes below
the location you have identified.  Interesting stuff.

Thanks,
Don (wd8dsb)

On Mon, Dec 15, 2014 at 12:42 PM, Doug Grant <dougk1dg at gmail.com> wrote:
>
> After some Googling and educated guessing, I have determined (and
> received confirmation of) the following:
>
> - It is a high-frequency surface-wave radar (HFSWR) system, developed
> by Raytheon Canada for the Canadian military. It seems to be a new
> version of the SWR503 MK2 HFSWR system. It is intended to detect ships
> up to 200 miles from a country's coast (EEZ) to protect against
> terrorists, smugglers, and unauthorized fishing vessels as well as
> locate vessels in distress. The present system has been detected at
> 1915, 3250, 4400, and 5300 kHz.
>
> - It is located at Hartlen Point, NS, near Halifax
>       (point Google Earth to   44 35 29.47 N   63 26 49.68 W  )
>
> and if you zoom in you can see the 500M long cleared area for the
> towers and the guy anchors.
>
> - W1FV was pretty close with his estimate of a heading of 75 degrees
> (it is actually 67 degrees from John's QTH).
>
> - ARRL, RAC, and Industry Canada (Canada's FCC) have been made aware
> of the interference that this signal is causing to amateurs.
>
> - The frequency band 1850-2000 is a shared allocation in Canada, among
> amateur, radionavigation, and radiolocation services.
>
> - A previous version of this system was installed in several other regions.
>
> 1915 kHz is not the primary operating frequency for the system. The
> higher frequencies generally work better for the intended purpose.
>
> So the mystery is solved...at least as far as the source is concerned.
>
> 73,
>
> Doug K1DG
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>