Another interesting device is the GPS jammer, which can affect the signal of the global positioning system (GPS). In some cases, car gps blocker ( https://www.thejammerblocker.c....om/gps-jammer-car-tr ) can be used for testing and research. For example, scientists can use this device to simulate a poor GPS signal environment to test the navigation system of an unmanned vehicle. In this process, the knowledge of theoretical physics helps researchers better understand the propagation and reception of signals.

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