source:truck tracking webfleet solutions release time:2022-11-19 Hits: Popular:realtime gps tracker online
The basic principle of GPS positioning is to determine the position of the point to be measured by using the method of space distance resection based on the instantaneous position of the high-speed moving satellite as the known starting data. Assuming that the GPS receiver is placed at the point to be measured on the ground at time t, the time △ t when the GPS signal arrives at the receiver can be measured. In addition to the satellite ephemeris and other data received by the receiver, the following four equations can be determined:
In the above four equations, the coordinates x, y, z and Vto of the point to be measured are unknown parameters, where di=c △ ti (i=1,2,3,4).
Di (i=1, 2, 3, 4) is the distance from satellite 1, satellite 2, satellite 3, and satellite 4 to the receiver.
△ ti (i=1, 2, 3, 4) is the time that the signal of satellite 1, satellite 2, satellite 3, and satellite 4 arrives at the receiver.
C is the propagation speed of GPS signal (i.e. the speed of light).
The meanings of each parameter in the four equations are as follows:
x. Y, z are the space rectangular coordinates of the coordinates of the point to be measured.
Xi, yi, zi (i=1, 2, 3, 4) are respectively the space rectangular coordinates of satellite 1, satellite 2, satellite 3, and satellite 4 at time t,
It can be obtained from satellite navigation messages.
Vti (i=1, 2, 3, 4) is the clock difference of satellite clocks of satellite 1, satellite 2, satellite 3, and satellite 4 respectively, which is provided by satellite ephemeris.
Vto is the clock error of the receiver.
The coordinates x, y, z of the point to be measured and the clock difference Vto of the receiver can be calculated from the above four equations.
Read recommendations:
Next article:GPS development mode
Related Information
Gps speed limiter distributors
2023-04-23Dog gps tracker company
2023-04-23gps tracker für auto webfleet solutions
2023-04-11fleet gps tracking
2023-04-11gps tracker online wholesale
2023-04-23Gps speed limiter Production
2023-04-23obd-II port gps tracker
2023-04-11Dog gps tracker price
2023-04-23Pet GPS Tracker price
2023-04-11cantrack asset
2023-04-23G06L- 4G Car GPS Tracker
2022-09-06personal gps tracker Production
2022-09-063 Years Disposable Asset GPS Tracker
2025-03-31G08L - 4inch Smart Tail Light Tracker
2022-06-2010000mAh Magnetic Asset GPS Tracker
2025-04-08Talk about the advantage of the use of pet smart positioner.realtime gps tracker online manufacture
2023-03-10The advantage of mobile phone GPS navigation.GPS Tracker for vehicles Production
2023-05-09What is GPS dual -frequency positioning technology?obd-II port gps tracker Manufacturing
2023-03-11Brief introduction of GPS control part
2022-09-22What are GPS in aviation flight navigation.gps tracker for trailer distributors
2023-04-10Development of GPS Continuous Operation Station Network and Integrated Service System.gps tracker no
2023-08-14Vehicle trajectory knowledge of vehicle GPS positioner popularization.gps tracker no monthly fee
2023-03-22International GPS development
2022-12-29The advantages of "Galileo" GPS positioning system
2023-02-11Introduction to GPS Watch.4G GPS Tracker for vehicles Solution
2023-08-09What kind of gps tracker is easy to use?
2022-09-08Functions of GPS
2022-10-12GPS positioning technology
2022-11-24gps vehicle tracker.The role of installing GPS satellite positioning devices in the sales and leasin
2023-10-27How to solve the problem of inaccurate car GPS positioner?plug & play Obd gps tracker Production
2023-03-28