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GPS is the frequency range used by navigation satellites to track the location of land, water, and aircraft on which GPS tracking devices are installed. The GPS frequency range has five frequency bands, but only three frequency bands are for civilian use-L1, L2 and L5. GPS is the most extensive tracking spectrum (developed and commonly used in the United States), but there are many other satellite navigation systems: Russian GLONASS, European Galileo, Chinese compass and Japanese QZSS. Depending on the different parts of the world you are in, you may use any of them at the same time, or even rarely use them.

The work of GPS is attributed to radio signals from satellites. The main provider is still the NavStar network of the US military, with at least 24 satellites in operation at any given time. The location of these satellites allows you to always see four of them from anywhere on the surface of the earth.

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Each satellite continuously broadcasts its location and time (measured by its on-board atomic clock). The GPS receiver compares the time with its own clock, and then calculates how far away each satellite must be. Once at least four satellites are locked and the error is resolved, it will find their precise location (see graphic). Nowadays, many receivers also use GPS to cheaply and easily access the accurate time given by the satellite clock.

GPS jammer were originally created for government use to hide the location of combat vehicles during high-risk missions. Essentially, a GPS jammer is a small device used to hide your whereabouts from GPS tracking devices that monitor your location and movement. The frequency of the radio signal emitted by the GPS jammer is the same as the radio frequency of the GPS device. Due to the interference, the GPS tracker cannot determine the location of your vehicle.

Modern life essentially requires us to give up data and privacy in daily activities from social media usage to airport travel (ie, biometric-based services such as Clear and TSA Precheck). These practices apply to our vehicles and in some cases also include our private conversations. Due to the constant risks of hackers and data leakage, many people are looking for ways to not only hand over less data, but also to protect themselves from harmful exposures.https://www.jammer-mart.com/portable-gps-blockers-jammers.html

Some of the most tempting and easily accessible methods of off-grid include GPS jammers and audio or voice protection systems, sometimes called voice jammers. When considering these different counter surveillance devices, it is important to recognize their differences, especially in terms of legality. GPS jammers are illegal devices, and audio jammers are legal and ethical, and they are named incorrectly because their functions are completely different from highly illegal devices.

A typical GPS jammer is useless. It is an independent device that can be plugged into a cigarette lighter or similar auxiliary power source. It will send interference signals (1575.42 Mhz) at a distance of up to 10 meters, and it is usually placed near GPS devices. After the GPS jammer is powered on, its running time is less than 20 seconds. These devices can meet a variety of needs-Wi-Fi and Bluetooth® connectivity, physical shields, remote controls, and options for use with spy cameras and drones.