mini gps tracker.Interference, deception, measurement, and other GPS failure modes

　　GPS vulnerabilities include unintentional interference, such as radio frequency interference, ionospheric interference caused by solar activity, and intentional interference, such as interference, the use of forged signals to deceive systems, and electromagnetic pulse (EMP) attacks on satellites. At present, protective measures against ionospheric interference caused by solar activity or enemy electromagnetic pulse attacks are very limited. A large-scale solar storm similar to the 1859 Carrington event could destroy the entire GPS satellite network.

　　The signals emitted by satellites are more susceptible to attack than the satellites themselves. Interference is both simple and cheap, and the cost of interference equipment is less than $200. Although interference devices are illegal in many countries, including the United States, they are produced in large quantities in China and are easily accessible. The military often interferes with GPS in certain areas during testing equipment or military exercises. The US government also regularly conducts tests and exercises that cause satellite signal interruptions.

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