In today's era of "a mobile phone is in hand, I have it in the world", mobile phones bring unparalleled convenience to people's daily life, such as daily communication, online shopping, takeaway, games, audio and video, entertainment, education and learning. Can be easily implemented on the phone. In addition to this, there is a particularly important feature that will be used frequently: that is navigation.
Our mobile phones are equipped with a map of Gaode, Baidu map, Google map or one of them. In order to realize the navigation sing function, these maps must be enabled with GPS positioning. “You have deviated from the route and are re-planning.” The use of GPS is indeed indispensable in life.
The GPS navigation system is a radio navigation and positioning system based on 24 positioning satellites around the world. It has 6 running orbits and provides real-time information such as 3D position and 3D speed to all parts of the world. Global Navigation Satellite Systems (GNSS) mainly include GPS (USA), GLONASS (Russia), GALILEO (EU) and Beidou/COMPASS (China).
GPS sub-band 5 bands, GPSL1-L5, civilian GPS usually only uses L1 band, survey and military use need to use L1 and L2 bands at the same time, L3 is mainly used for military and scientific research applications, L5 is the third kind of civilian GPS signal, We can't do without GPS navigation. However, along with the universality of GPS, GPS trackers have also emerged. It is cheap, small and portable, and has become a tool for many unscrupulous people to follow others and implement crimes.
The gps jammer is an intercepting device specially designed for GPS tracking signals. It can shield the GPS signals around itself within a certain range, so as to hide itself and avoid being tracked by others. Anti-GPS tracking devices are common on the Internet, and some can be placed in a pocket or in a compartment, which is very convenient, and only needs to be turned on when using. However, it is not allowed in many places, so we should pay attention to the purpose and place of use when purchasing, and not use it illegally.