source:truck tracking webfleet solutions release time:2024-01-17 Hits: Popular:realtime gps tracker online

To understand the principle of positioning, first popularize what GPS is. GPS (Global Positioning System) is a new generation satellite navigation and positioning system developed by the United States in the 1970s and fully completed in 1994. It has the function of real-time three-dimensional navigation and positioning in all directions at sea, land, and air. The system consists of three parts: the space part (GPS satellite), the ground monitoring part, and the user part. There are a total of 24 satellites in the space section, of which 21 are working satellites and 3 are backup satellites, distributed in 6 orbits at an angle of 60 ° to each other. The distribution of satellites allows for the observation of more than 4 satellites anywhere and at any time in the world, and maintains a geometric shape with good positioning accuracy. This provides continuous global navigation capabilities over time.
Our mobile end belongs to the user part of the GPS system, and its built-in GPS module only has the receiving function, not the transmitting function. GPS satellites are equipped with high-precision cesium atomic clocks to ensure the accuracy of time synchronization. The satellite continuously transmits carrier signals to the Earth, which modulate broadcast ephemeris and timestamps representing the satellite's position, as well as C/A and P codes used for ranging. The C/A code is coarse and is generally used for civilian use, while the P code is fine and not easily interfered with. It is used for military use.
After the GPS module on the mobile phone receives the GPS signal, the time difference △ t can be obtained by comparing the timestamp in the navigation message with the current time in the device. The speed of electromagnetic waves v is the same as the speed of light propagation, and v multiplied by △ t to obtain the distance between the mobile phone and the GPS satellite (the receiver satellite clock has certain errors and atmospheric propagation errors, and the measured distance is also known as pseudorange), Each GPS terminal can simultaneously obtain navigation messages from at least 4 satellites. By using the method of spatial distance resection, we can calculate the three-dimensional position and other information of the mobile terminal, so that we can understand our current position on the mobile terminal.
Read recommendations:
3 Years Disposable Asset GPS Tracker
Do I need to pay information for using GPS?
The characteristics and composition of the car GPS positioner.mileage tracking webfleet solutions
Last article:4G GPS Tracker.There are four mainstream satellite systems worldwide
Next article:Gps speed limiter.The application advantages of GPS measurement technology
Related Information
Cantrack Login
2023-04-23pet gps tracker cat wholesale
2023-03-164G GPS Tracker for vehicles
2023-03-16gps vehicle tracking
2023-03-16Car gps tracking manufacturer
2023-04-23car gps tracker manufacturer
2023-04-23personal gps tracker distributors
2023-03-16pet gps tracker cat manufacture
2023-03-16Pet GPS Tracker supplier
2023-03-16trailer gps tracker
2023-03-16G900LS J16-4G Car GPS Tracker
2023-10-063 Years Disposable Asset GPS Tracker
2025-03-31TK100 (GT06) Vehicle Tracker
2022-06-206000mAh Magnetic Asset GPS Tracker
2025-03-31G08L - 4inch Smart Tail Light Tracker
2022-06-20How to use the Beidou GPS positioner.plug & play Obd gps tracker Processing
2023-04-14Navigation GPS antenna installation location diagram
2022-08-12Brief analysis of functions of vehicle positioning system.vehicle gps tracker webfleet solutions
2023-03-13Development Trend of Automotive GPS Positioning System
2022-08-26The cause of error in the GPS vehicle positioning system
2023-04-03GPS, get closer to our lives
2023-02-08How to judge the quality of a car GPS locator?vehicle gps tracker webfleet solutions
2023-03-21Disadvantages of Bluetooth GPS receiver.fleet tracking mobile app
2022-11-16GPS locator
2022-10-27What are the precautions for installing the car GPS positioner
2023-02-25Domestic GPS operators.plug & play Obd gps tracker distributors
2023-08-18GPS FFT algorithm
2022-11-10How to measure radar, GPS, Beidou and radio positioning.gps tracker for trailer Processing
2023-05-12Application introduction in GPS Meteorology.obd2 gps tracker verizon Production
2023-05-06The principle of GPS is introduced to you
2022-11-19