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:

gps vehicle tracker Factory

4G GPS Tracker Processing

VSL100 GPS Speed Limiter, Speed Governor

Gps speed limiter.The significance of installing GPS system in vehicle safety management

Overview of the car navigation system.Magnetic gps tracker Manufacturing

Last article:GPS application

Next article:GPS Outlook

Related Information

4G GPS Tracker price

2023-04-23

GPS Tracker sales

2023-04-11

real-time gps tracking

2023-04-11

Gps speed limiter Vendor

2023-04-23

fleet gps tracking Vendor

2023-04-23

gps tracker for bike

2023-04-11

4G GPS Tracker for vehicles manufacturer

2023-04-23

real-time gps tracking manufacturer

2023-04-23

4G GPS Tracker wholesale

2023-04-23

gps vehicle tracker sales

2023-04-11

3 Years Disposable Asset GPS Tracker

2025-03-31

G900LM-4G Car GPS Tracker

2025-03-25

G02M Pet Tracker

2022-06-19

3000mAh Magnet Asset GPS Tracker

2025-03-31

6000mAh Magnetic Asset GPS Tracker

2025-03-31

The difference between the Beidou satellite positioning system and the Beidou navigation system.plug

2023-05-06

Introduction to GPS Navigation

2022-07-23

The market for electric vehicle GPS positioner is huge.realtime gps tracker online Manufacturing

2023-03-09

GPS Knowledge Base: What is RTK Technology

2022-08-18

The manufacturer will share with you how to provide accurate data for the fuel consumption recorder.

2023-05-09

GPS system functions

2022-11-09

System Composition of GPS PPS Clock Synchronization Technology

2022-11-11

GPS China Beidou navigation satellite

2022-10-20

The conversion method of GPS coordinates in unit degrees and seconds

2022-10-11

Application of RTK in Engineering Surveying.real-time gps tracking maker

2023-07-03

GPS FPGA Program Design

2022-11-10

The main features of the GPS vehicle positioning system.gps tracker for trailer Manufacturing

2023-03-28

UUGPS positioning system

2022-09-19

Classification of GPS antenna

2022-11-12

The main function of the electric vehicle Beidou GPS positioner

2023-03-06