Industry News

Home > NEWS > Industry News

Company News

Industry News

GPS Navigation Principle

source:Industry News release time:2022-08-01 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:

Pet GPS Tracker price

pet gps tracker cat Factory

GF30 Magnet GPS tracker with Voice listen

Vehicle Management System Based on Differential GPS Technology

The correct method of using the car GPS positioning system shallow analysis.realtime gps tracker onl

Last article:GPS application

Next article:GPS Outlook

Related Information

4G GPS Tracker for vehicles wholesale

2023-04-23

Cantrack GT06

2023-04-11

4G GPS Tracker manufacturer

2023-04-23

car gps tracker Factory

2023-04-11

gps vehicle tracker Factory

2023-04-11

Dog gps tracker Processing

2023-04-23

realtime gps tracker online wholesale

2023-04-23

Hidden GPS Trackers wholesaler

2023-03-16

mini gps tracker distributors

2023-04-23

real-time gps tracking Processing

2023-04-23

G03

2022-06-21

G900LS-4G Car GPS Tracker

2023-10-06

4G Wired GPS Tracker PCBA

2022-06-17

G500M-Mini GPS Tracker

2022-06-20

P60L Personal gps tracker

2022-06-21

Preparation before using GPS

2022-12-28

GPS positioner helps logistics and transportation companies manage transparency and intelligence.obd

2023-03-28

GPS positioning anti-theft device G16A

2022-09-17

GPS positioner positioning is inaccurate.gps tracker no monthly fee distributors

2023-04-25

GPS receiver product.Magnetic gps tracker wholesale

2023-06-05

GPS automatic gain control system

2022-11-17

How to judge the impact of GPS positioner on battery life.real-time gps tracking Manufacturing

2023-04-06

How to choose the GPS locator of a car loan?obd2 tracker Manufacturing

2023-03-15

Judging the Advantages and Disadvantages of GPS Navigator.4G GPS Tracker manufacturer

2023-07-24

Compared to the advantages of GPS car navigation and mobile phone navigation.GPS Tracker for vehicle

2023-05-09

Positioning Technology Based on GPS Mobile Network

2022-10-10

Classification and cause analysis of lithium battery explosion

2022-10-18

Composition and Application of GPS.gps tracker app distributors

2023-07-04

Application introduction in GPS Meteorology.obd2 gps tracker verizon Production

2023-05-06

GPS star search method.Hidden GPS Trackers Processing

2023-06-09