[time-nuts] Jamming GPS

jmfranke at cox.net jmfranke at cox.net
Mon Nov 16 17:36:01 UTC 2009


For testing, I would suggest using a directional coupler in the antenna lead to reduce the chances for unwanted radiation.

John  WA4WDL

---- John Green <wpxs472 at gmail.com> wrote: 
> All the discussion regarding jamming GPS has been very interesting. Because
> it is spread spectrum, I always assumed it would be difficult to jam GPS.
> The Monterey Bay incident indicates that it is extremely easy to jam GPS.
> So, as soon as another project is out of the way, I intend to do some
> experiments, more of a practical than scientific nature. I have a Z3801 and
> Tbolt to start with. I would also like to experiment with a hand held and a
> GPS enabled cellphone. To prevent unintended interference, signal levels
> will have to be carefully controlled and transmission time will have to be
> kept short. I want to try CW as well as modulations of varying types. Any
> suggestions as to the most effective modulation type to try?
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