Industry News

Home > NEWS > Industry News

Company News

Industry News

GPS principle

source:Industry News release time:2022-07-23 Hits:     Popular:realtime gps tracker online

  24 GPS satellites operate at an altitude of 20,200 kilometers above the ground, making it possible to observe more than 4 satellites simultaneously at any point on the ground at any time.

  Since the position of the satellites is accurate, we can obtain the distance from the satellite to the receiver in GPS observation. Using the distance formula in the three-dimensional coordinates and using three satellites, three equations can be formed to solve the position of the observation point (X , Y, Z). Considering the error between the satellite's clock and the receiver's clock, there are actually 4 unknowns, X, Y, Z and the clock difference, so it is necessary to introduce a fourth satellite to form 4 equations to solve, so as to obtain the observation point's Latitude and longitude and elevation.

  In fact, the receiver can often lock more than 4 satellites. At this time, the receiver can be divided into several groups according to the constellation distribution of the satellites, each group has 4 satellites, and then the group with the smallest error is selected by the algorithm for positioning, thereby Improve accuracy.

  Due to errors in satellite orbits and satellite clocks, the influence of the atmospheric troposphere and ionosphere on signals, and the artificial SA protection policy, the positioning accuracy of civilian GPS is only 100 meters. In order to improve the positioning accuracy, differential GPS (DGPS) technology is generally used to establish a base station (differential station) for GPS observation, and use the known precise coordinates of the base station to compare with the observed value to obtain a correction number and publish it to the outside world. . After receiving the correction number, the receiver compares it with its own observation value, eliminates most of the errors, and obtains a relatively accurate position. Experiments show that using differential GPS, the positioning accuracy can be improved to 5 meters


Read recommendations:

4G LTE gps tracker

gps vehicle tracker Factory

6000mAh Magnetic Asset GPS Tracker

gps vehicle tracker.How to detect if a GPS locator has been stolen and whether it can be completely

Handheld GPS Device

Last article:GPS navigation function

Next article:GPS Outlook

Related Information

obd2 gps tracker verizon wholesale

2023-03-16

Magnetic gps tracker distributors

2023-03-16

GPS Tracker for vehicles Vendor

2023-03-16

mini gps tracker Vendor

2023-04-23

4G GPS Tracker Factory

2023-04-23

fleet gps tracking custom

2023-04-23

real-time gps tracking distributors

2023-04-23

gps tracker app

2023-04-11

car gps tracker custom

2023-04-11

4G GPS Tracker for vehicles sales

2023-04-23

G900LM-4G Car GPS Tracker

2025-03-25

G500M-Mini GPS Tracker

2022-06-20

TK100B- Accurate Pro version GT06/TK100

2023-10-06

6000mAh Magnetic Asset GPS Tracker

2025-03-31

TK200AM-Disposable GPS Tracker

2022-06-21

How to prevent the disassembly of the car GPS locator?personal gps tracker manufacturer

2023-03-15

GPS road signs (Landmark Or Waypoint).gps tracker auto manufacturer

2023-06-10

How to do car GPS positioning in a car rental company.obd2 gps tracker verizon distributors

2023-03-16

Three wiring line search methods for installing GPS positioner.realtime gps tracker online supplier

2023-04-11

Centimeter -level high -precision 4G full Netcom GPS positioner.fleet management software webfleet s

2023-03-08

How to choose high-quality GPS positioning products?fleet tracking mobile app

2023-03-23

Frequently problem solving of GPS positioner.realtime gps tracker online distributors

2023-03-09

What are the classification of GPS system.gps tracker no monthly fee wholesale

2023-04-21

Introduction and Comparison of GPS PPS Technology and Other Clock Synchronization Technologies

2022-11-11

Mobile GPS positioning

2023-07-13

GPS Processor (GPSPU)

2022-09-05

What is the Beidou GPS positioner?gps tracker no monthly fee distributors

2023-03-28

Whether GPS positioning is GPS navigation.obd-II port gps tracker manufacture

2023-05-09

The cause of error in the GPS vehicle positioning system

2023-04-03

The obvious advantages and characteristics of GPS products

2023-02-01