To understand the working principle of the jammer, we first need to understand the working principle of the Global Positioning System (GPS). GPS trackers receive microwave signals from many satellite transmitters orbiting the earth, and their altitude is approximately 20,200 km. Once the tracker receives signals from four or more satellites, it will determine its position through a series of time calculations and trilateral measurements.
The receiver relies on these precise and specific satellite signals to determine where it is in the world. Then, the GPS tracking device sends this location and speed information to the monitored location. Usually, this data is transmitted through a cellular network.
In some cases, satellite interference or solar flares can temporarily interfere with the transmission of GPS signals. GPS jammer emit radio signals or signal noise at the same frequency as GPS equipment to cover or distort GPS satellite signals. Because the satellite signal is obscured by interference, the GPS device can no longer calculate its position.