[time-nuts] Re: UTC Backbone in Europe

[Lester Veenstra]

Most illuminating on how difficult it was to find a unstable CW source at this frequency.  That indicated a DSS PRN source would be very difficult to correlate and find unless the PRN sequence could be identified (predicted) and used in a correlation receiver.  Or a multiple synchronous receiver system might be able to use cross correlation  across a local net to geolocate. 

Lester B Veenstra  K1YCM  MØYCM  W8YCM   6Y6Y W8YCM/6Y 6Y8LV (Reformed US-NSG CTM1)
lester at veenstras.com

452 Stable Ln
Keyser WV 26726 USA

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-----Original Message-----
From: W3AB via time-nuts [mailto:time-nuts at lists.febo.com] 
Sent: Friday, November 22, 2024 10:33 AM
To: Hal Murray via time-nuts
Cc: W3AB
Subject: [time-nuts] Re: UTC Backbone in Europe

I co-authored an article on finding a GPS jammer.
https://www.gpsworld.com/the-hunt-rfi/

⁣___
Sent from my two-way wrist watch
73 de W3AB/George ​

On Nov 21, 2024, 21:57, at 21:57, Hal Murray via time-nuts <time-nuts at lists.febo.com> wrote:
>
>Poul-Henning Kamp said:
>> There's no escaping the wavelength:
>> Hiding a transmitting antenna for 100kHz is very, very hard.
>
>You can use the power lines.
>
>I remember a story from Dave Mills many years ago.  I tried to find it
>the 
>other day, but no luck.
>
>His WWVB gear wasn't working -- fading out due to EMI.  He drove around
>
>and found a factory that was spewing lots of trash.  I think it was
>going 
>out the power line.  The FCC wasn't interested.  Anybody else remember 
>that story?
>
>
>A lot depends on how big an area you want to jam.  Cheap eBay GPS
>jammers 
>were intended to cover the receiver on a truck but at least one managed
>to 
>get an airport in New Jersey that was near a freeway.
>
>I wonder how big an area a similar size and power unit for 60 or 100
>kHz 
>would take out with various non-monster antennas.
>
>-- 
>These are my opinions.  I hate spam.
>
>
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