[time-nuts] How hard is it to detect a GPS Jammer?

[Chris Albertson]

Yes, these specific jammers do, but someone asked the general question "how
to detect a jammer" and a sophisticated jammer will use no more power than
is requires so as to avoid detection.  Could it be that there are such
devices and they are successful at avoiding detection?    Likely not as at
present no one cares if they are detected.  But if they start getting
hunted out things will change.

About spoofers, yes thay are not available on eBay.  But I was thinking
about military applications.   Can you know when you are being spoofed?


On Mon, Oct 7, 2013 at 6:11 PM, Jim Lux <jimlux at earthlink.net> wrote:
>
> The jammers put out many milliwatts and have enormous signals that are
> obvious on a spectrum analyzer.  GPS signals are invisible on a spectrum
> analyzer, normally.  IN fact, most GPS receivers don't work very well if
> there are signals above the noise floor: they depend on the noise to make
> them work with their mighty 1 bit quantizers.
>
>
>
>>
>> Spoofers are a real problem.
>>
>
> I doubt anyone is selling spoofers on eBay.
> Sure, one can probably find some  code to run on a USRP from some grad
> student's project.




-- 

Chris Albertson
Redondo Beach, California