[ntp:questions] GPS Jammers in Use by Criminals - Warping Time for Fraud Suggested

[John Hasler]

Chris writes:
> A sophisticated jammer would know exactly when to transmit over one
> bit or two bits, and in a narrow band just enough to corrupt the GPS
> data and would have a very lower average power output.

That would be a very sophisticated jammer indeed.  GPS is not narrow
band.  It's spread-spectrum.  Spoofing it is much, much harder than
jamming it (though not impossible for simple consumer-grade receivers).

BTW jamming won't do a bit of good for the "time warping" fraud
suggested.
-- 
John Hasler 
jhasler at newsguy.com
Dancing Horse Hill
Elmwood, WI USA