GPS signal jammers come in a variety of designs, each suited for slightly different uses.GPS, Galileo, Chinese, Japanese and Russian satellite navigation systems and their enhancements all use essentially the same technology and the same frequency bands.Even more serious than jammers are civilian GPS spoofers, which have been shown recently.Spoofing is sending fake GPS signals; the receiver locks on to them, and the spoofer takes control of the receiver.Vehicles will also be able to avoid a purely GNSS-based road user pricing system.But there are already low-cost GPS generators with programmable scenarios that can use Google Earth to input trajectories.

The models intended for cars, for instance, only work while the car and thus the GPS signal jammer is powered on.They use them to disrupt tracking systems, thereby stealing vehicles and their valuable content.Jammer: A low-power radio transmitter that can overwhelm GPS reception at a range of tens of meters.It blocks the data channel of any tracking system and disables mobile devices that can be used to call for assistance or track themselves using cell site analysis.Nearby jammers can easily deafen a vehicle's sat navigator because it's hard for them to hear these tiny signals.

Today, it’s almost ridiculously easy to gain access to such a transmitter.Many people produce fake GPS locations to prevent applications from precisely tracking their movements.In a GPS spoofing attack, a terrestrial radio transmitter mimics GPS signals at a greater signal strength than the actual system can muster, effectively replacing real GPS signals with a fake signal.Spoofing GPS is no longer something that requires the resources of a nation-state.One of the reasons that GPS is easy to spoof is that the signal is unencrypted.Since no form of authentication or verification is required for GPS transmissions, just about anyone can use the publicly available specifications and falsify a location.

It might be a bit mystifying to some as to why someone might want to jam a GPS signal.Improve its technology to detect jammers and try to legally ban their sale and use.GPS and other Global Navigation Satellite Systems (GNSS) circle the earth in medium earth orbit, which is around 12,550 miles above the ground – the equivalent of almost five trips from San Francisco to New York.Since those satellite signals are transmitted across such a great distance, they are pretty weak by the time they actually reach your device.This used to be complicated, expensive electronics that only militaries could do.

GPS jammers can also disrupt many communication systems, including the Tetra Airwave system used by emergency services.And you can still be tracked by your mobile phone’s own signals if you don’t take precautions.However, just because you have a GPS signal jammer doesn’t mean you still can’t be tracked.Of course, terrorists fighting on the ground in Afghanistan and other countries also make use of GPS signal jammers, some Russian-made.Not enough to disrupt signals from other cars, but enough to keep you in a cone of gps jamming silence.

This jammer would beat GPS-based road user pricing systems, and jammers ten times more powerful than those on the market today.The first, and most popular model to hit the mainstream market was one that plugs into the cigarette lighter of a car, effectively disrupting the signal for a 15-foot radius.There are a number of types of noise signals it can send; some call for a narrowband Gaussian signal, others for a simple continuous wave.The GPS signal jammer works by sending out its own signal on the same frequency as the GPS unit, a noisy signal that prevents it from receiving or transmitting any useful information.

Fraudsters will allow criminals to hijack and divert the vehicle, while the tracking system shows it's still following its planned route, so no alarms will sound.Now, chances are, any GPS you will have contact with uses the radio frequency set aside for civilian use.The basic purpose of cell phone jammer is to prevent GPS loggers from either receiving satellite signals or sending signals back to their base station.However, there are those with a particular need for privacy, be it to massage their paranoia, keep law enforcement from engaging in warrantless car tracking, take an unauthorized lunch break with a GPS-enabled company car, or a teenager not want their parents to track their GPS phone.

But these two are harder to jam than GPS and don't draw people's attention.Some rare can only be found in certain parts of the world – if you can’t travel to get them, placing your phone there virtually is the next best thing.Spoofing your device’s GPS receiver so it displays another place is also a popular way to obtain access to country-specific features of games and other applications.Some do it to maintain control over their personal data by telling location services that are overtly or covertly tracking users that they’re in Kazakhstan.GPS spoofing technology is virtually free, widely available, and very popular.

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