The vital role of GPS systems and gps jammer in many areas

Todd Humphreys, director of the Radio Navigation Lab at the University of Texas at Austin, showed his students a video of the most recent experiment. We saw a smartphone that kept its power and its screen displayed Google Maps: "The device is on its GPS chip and displays its blue dot position on the map." Suddenly, the blue dot starts moving as if the smartphone just entered the car. And it is still in the same place. The GPS chip sends the wrong location, but is believable because the progress on the map proceeds along the street at normal speed.
 
To explain this mystery, Todd Kan points to a mediocre housing, placed in the corner of the workshop: "This is a spoof ("gps jammer"), a GPS simulator that captures the authentic signals from GPS satellites. After slightly modifying the coordinates And then re-transmitting their neighboring GPS systems at the same wavelength will first get the wrong signal from the scammer because it is more powerful than a satellite that is 20,000 kilometers away. If I use a good antenna on the roof of the building With an antenna installed, I can distort all the GPS nearby, even those flying over the city."
 
According to Todd Kan, a deceitful malicious hacker exploits, gangsters or terrorists can lead to a chain of disasters, because the GPS system is now playing a vital role in many areas of activity: land, air and shipping, container management, agricultural machinery guidance, Electronic communications and even banks use satellite signals as a universal clock for financial transactions to date, reaching one hundredth of a second.
 
So far, no major incidents of fraudsters have been used, but Todd Humphreys said that isolated hackers are playing with the construction process. Scientific experimental models are available on the Internet.
 
On the other hand, more basic devices designed to block GPS signals are becoming commonplace. These are fairly simple machines that broadcast a false signal at the wavelengths used by the satellite. As a result, the surrounding GPS system lost its way and stopped working.
 
They are banned in most countries but are free to use on various European and Asian websites. The small pocket jammer that charges on the car cigarette lighter costs only 30 euros. More powerful models cost about 200 euros. Some Chinese websites even sell tripod-type military super jammers that can destroy GPS more than a mile away. In another type, groups of hackers campaigning to protect citizens' privacy have published on the Internet instructions for DIY users to make their own jammers.
 
In Austin, Todd Humphreys has purchased these machines in the lab twenty to test: "They, they are almost the same, which means they are all from the same factory, probably China." He also found Small, inexpensive models are usually much more powerful than expected and can damage GPS systems that are tens of meters away.
 
On their website, the seller explained that the jammer is used to neutralize GPS beacons placed in the vehicle without the driver's knowledge or contrary to his wishes. Therefore, in the United States, they have been used by truck drivers for many years, and they want to evade surveillance of the company, such as working in the moonlight during the rest day. In 2009, at the Newark Airport near New York, the GPS aircraft guidance experimental system was mysteriously destroyed four times a week for a fixed period of time. It took a lot of time for the experts to understand that the culprit was the delivery truck with the jammer, which passed near the airport.
 
This problem may soon expand as long-term surveillance beacons for carriers, police and spies are now being offered to the public. Garmin is known worldwide for its automotive and recreational GPS, offering a large label of 199 euros, which is easy to hide in cars, motorcycles, suitcases - is the ideal tool for husbands, suspicious bosses, overly curious parents, no Honest competitors, over-enthusiastic security services... If these labels are widely used, we should also expect explosive growth in sales of jammers.
 
In addition, organized truck thieves gangs began using GPS jammers. Austin-based electronics monitoring specialist Freightwatch is closely watching this phenomenon. According to its director Bill Games, this type of business is very rare in North America and Europe, but it is very common in Mexico, especially Brazil: "First, the thief is equipped with interference in the car in the car, he said: GPS system can not track The truck was stolen. Then the gangster forced the driver to stop and use the truck to get off the vehicle with a stationary escort."
 
The counterattack has been organized. In the UK, a public and private laboratory alliance has developed a device that can detect the presence of GPS jammers. In tests conducted along British roads, the researchers were surprised to find that they were quite common - several times a week at a crossover, random shots.
 
In Austin, Todd Humphreys completed the development of a more advanced device that will pinpoint GPS jammers and allow police to capture them. But beyond that, he pointed out that the USRP (Universal Software Radio Peripherals) of the new radio transmitters is highly prized by researchers and enthusiasts because they cover all bands and can play signals on GPS frequencies, which leads to Very effective interference. The disturbance war has just begun.