GPS achieves high -precision radio navigation positioning through artificial earth satellites. GPS positioning includes pseudo -distance single -point positioning, carrier phase positioning, and
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GPS achieves high -precision radio navigation positioning through artificial earth satellites.
GPS positioning includes pseudo -distance single -point positioning, carrier phase positioning, and real -time differential positioning. The pseudo -distance measurement is to determine the distance from the satellite to the receiver, that is, the distance between the ranging code signal transmitted by the satellite to reach the GPS receiver is multiplied by the speed of light. The carrier phase measurement is the phase delay from the GPS satellite carrier signal to the receiver antenna. The GPS satellite carriers are prepared on the ranging code and navigation electrical texts. After receiving the satellite signal, the ranging code and satellite electrical text on the carrier are first removed, and the carrier is re -obtained.
The principle of real -time differential positioning of GPS is to place the GPS receiver (referred to as the benchmark station) on the existing accurate heart coordinate points, and use the well -known ground -hearted coordinates and Star Calendar to calculate the correction value of the GPS observation value, and use radio communication through radio communication Equipment (referred to as a data chain) sends the correction to the GPS receiver (called a mobile station) in the movement.
server
After the GPS positioner receives the satellite electrical text emitted by the GPS, the information is forwarded to the Internet server through the communication module of the positioner. Because it receives a very primitive series of data, these data must be parsed through the server to further grasp the specific location information. And, only uploaded to the Internet can people find the location information of the vehicle through software,
Positioning service platform
Where to check the data analysis? In order to solve this problem, the positioning service platform has been developed. As long as you log in to the account password binding the GPS positioner, you can quickly see the location information of the vehicle on the platform. Vehicle information includes location, speed, direction, and even historical driving data, which can be seen on the positioning service platform. In addition to real -time positioning and viewing historical trajectory, electronic fences can also be set up, real -time road conditions and street views can be set up.
If the GPS positioner is to implement the positioning function, the data receiving, analysis and viewing transformation must be completed through the three lines of GPS, server and service platforms to achieve. Of course, due to the delay and instability of the signal, the positioning results usually have an error of 5-30 meters, but the impact is not great.
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