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How GPS Jammers Can Be Defeated
07/11/09
GPS jammers have had an increase in interest by the public and employees who drive vehicles that are equipped with vehicle GPS tracking devices. GPS jammers provide some privacy to the person being tracked because they jam the signal coming into the GPS tracking device so it can't record the location of the vehicle during the trip.
As with most technology, GPS tracking jammers can be overcome as well, however the ability to overcome a GPS tracking jammer is currently only within the domain of the military to overcome the defenses against GPS guided weapons.
How does an anti-jamming system work? This article has a great description of how they work in theory.
http://www.strategypage.com/htmw/htecm/articles/20090529.aspx
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