GPS system is the abbreviation of Global Positioning System (Global Positioning System) in English. Because it is the only system in the world that can provide free positioning services in a large area, our market also regards GPS as the collective name of satellite positioning system (in fact, satellite positioning and navigation system). The more official statement is GNSS, not GPS). Most of the situations that we can use GPS in our daily life are for navigation, and the application of GPS is only here? Of course not, today we will introduce the uses of GPS system in our daily life.

　　From the positioning function of GPS, we can simply derive it from the measurement function. Simply speaking, the navigation map software we use and some related data are collected through GPS positioning coordinates, and we usually use the navigation function when we use it. In turn, the process of collecting and drawing data points into a map is reversed, and the positioning information is projected onto a map using a coordinate system to complete the navigation.

　　Because GPS free signal can carry out accurate positioning of about 3 meters, and some processed data or commercial/military signal positioning data of GPS system is more accurate, so it is a measurement method commonly used in the world.

　　And some special uses of the GPS system are not invisible to us. In fact, they exist in our daily life, but we seldom notice them, and some of these new application methods have gradually become popular. There will be more and more contacts.

　　Deriving important functions based on non-positioning functions

　　GPS positioning is based on the principle of timing. By releasing time information from satellites at different positions, the receiver can calculate the distance from each satellite after receiving the time difference, so as to obtain the specific position of the receiver. Therefore, from another perspective, the GPS system itself is a super-large timing system. GPS can come into play whenever you need to synchronize the time.

　　According to the continuity and accuracy of GPS timing, it is more accurate than the broadcast timing and radio timing that we can access. The timing methods mentioned later have a certain interval, so errors will inevitably accumulate, so that the continuous GPS system , the whole region timing is more valuable.

　　Because the time can be synchronized, in our power system, communication system, and financial system, as long as multiple individuals need time for accurate matching, the timing of the GPS system is necessary for these individuals. For example, the fault location, lightning monitoring, and relay protection required in the power system can be judged by the accurate time difference, and the efficiency of manual investigation will become very low.

　　The communication system needs accurate timing, so as to distinguish between different communication systems when receiving and sending information without confusion, reducing the pressure on the system, the same is true for the financial system. If financial institutions around the world do not have a unified time, then the reliability of financial transactions will be greatly discounted.

　　Through the global timing of GPS, such as the timetable of the airport, the accuracy of air transportation can be ensured by synchronizing the time, and the flight interference between routes can be reduced. It is precisely because of the importance of global timing that many countries hope to establish their own satellite positioning systems, including China's Beidou system, Russia's GLONASS system, European countries' Galileo system, India's GAGAN system, Japan's Quasi-zenith system, etc. Therefore, in the future life, we will usher in more and more abundant positioning services.

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Here, I want to talk about how to use the GPS receiver practically.