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:

gps vehicle tracker manufacture

pet gps tracker cat custom

TK08AL- RFID Car GPS Tracker

Gps speed limiter.The world's four major satellite positioning and navigation systems

Beidou Navigation GPS

Last article:GPS navigation function

Next article:GPS Outlook

Related Information

real-time gps tracking company

2023-04-23

rastreadores gps

2023-03-16

GPS Tracking

2023-04-11

mini gps tracker distributors

2023-04-23

gps vehicle tracker Manufacturing

2023-04-11

mini gps tracker manufacturer

2023-04-23

real-time gps tracking Vendor

2023-04-23

gps vehicle tracker custom

2023-04-11

vehicle gps tracker manufacturer

2023-03-16

gps vehicle tracker wholesale

2023-04-23

G900LS 8 Lines-4G Car GPS Tracker

2025-03-31

NB20 -4G Bluetooth Smart Pet Tracker

2022-06-21

GF30 Magnet GPS tracker with Voice listen

2022-06-21

GF70L-Solar Magnetic Asset GPS Tracker

2023-10-07

G03

2022-06-21

GPS application

2022-08-01

Vehicle GPS

2022-12-08

GPS design idea and scheme

2022-11-18

GPS Logistics Tracking and Monitoring Application Solution

2023-02-02

Global Navigation Satellite System

2022-11-04

Difficulties in GPS indoor navigation

2022-11-03

The difference between GPS positioning and mobile positioning.obd2 gps tracker verizon manufacture

2023-08-03

GPS receiving antenna

2022-09-27

GPS parameter.Gps speed limiter Solution

2023-05-25

Classification and cause analysis of lithium battery explosion

2022-10-18

GPS screen reaction problem.plug & play Obd gps tracker Manufacturing

2023-04-12

How to use the car GPS navigator.realtime gps tracker online Vendor

2023-05-19

GPS navigation phone.portable gps tracker Solution

2023-06-07

What are the fixed installation locations for GPS locators.gps tracker for trailer maker

2023-06-20

Guidelines for purchasing mortgaged cars - Use of GPS anti-theft devices.personal gps tracker wholes

2023-09-12