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

Hal Murray hmurray at megapathdsl.net
Mon Oct 7 00:59:50 EDT 2013


The recent discussion of solar flares screwing up GPS timing was interesting.

I just watched Todd Humphreys TED talk again.  He's focused on location, but 
does mention time in terms of stock exchanges.
  Todd Humphreys: How to fool a GPS
  http://www.ted.com/talks/todd_humphreys_how_to_fool_a_gps.html

He's got a good discussion of GPS jammers and spoofers, but no geeky details.


What's the spectral/power output of the typical eBay GPS jammer?

Suppose I lived near a major highway.  Could I build a receiver that would 
count jammers driving by?  Could I track them (at least somewhat) with a 
directional antenna on a rotator?

Is this something semi-geeky amateurs could contribute to?

What sort of gear has harmonics in the GPS band?

------

I assume people are familiar with the trucker who jammed the FAA test in NJ.  
Here is a good story:
  http://www.insidegnss.com/node/3676

That article has a link to commercial gear targeted at this market.
  http://www.exelisinc.com/solutions/signalsentry/Pages/default.aspx
The graphics shows 3 receivers is a port/harbor setting.



-- 
These are my opinions.  I hate spam.





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