GPS jammers have interfered with a GPS-based precision landing system at Newark Liberty International Airport since at least 2009 , and so far it appears the Federal Communications Commission has caught just two folks who use the gadgets.

GPS signals are extremely faint, and it does not take much to dazzle a GPS receiver with a more powerful radio signal. This makes it relatively easy for anyone with a 'http://www.jammer-buy.com/gps-jammer/c-25.html' (a low-power pocket-sized device that emits a strong signal) to swamp the circuitry in the receiver so that it cannot detect the GPS signal.

Truckers on the adjacent New Jersey Turnpike and airport roads use the jammers to knock out GPS tracking devices installed by their employers, and by doing so, they also interfere with operation of the Federal Aviation Administration’s Ground Based Augmentation System, which provides enhanced navigation signals to aircraft in the vicinity of the airport for precision approach, departure procedures, and terminal area operations.

In 2009, engineers at Newark airport in New Jersey noticed that GPS receivers for a new navigation system were suffering brief daily breaks in reception. It took two months for investigators from the Federal Aviation Authority to discover that a driver was passing by on the nearby New Jersey Turnpike each day with a cheap GPS jammer in his truck.

The FAA plans to place heavy reliance on GPS between now and 2030, with the satellite system as the core of its Next Generation Air Transportation System, and plans to decommission its ground based VHF omnidirectional radio, or VOR, by then.

http://www.jammer-buy.com/jammer-blocker-devices/c-1.htmlcan affect GPS as well as other GNSS systems. In September 2012, the FAA set up a GNSS Intentional Interference and Spoofing Study Team to “identify technical, political, legal, and operational ways to mitigate the impact of GPS spoofing and jamming.”

Deborah Lawrence, manager of FAA's navigation programs, told the conference that the study team will, by the end of September, provide the agency with “specific, actionable recommendations” on how to counteract spoofing and jamming.