truck tracking webfleet solutions

Home > NEWS > Other information > truck tracking webfleet solutions

Company News

Industry News

Origin of GPS development

source:truck tracking webfleet solutions release time:2022-12-29 Hits:     Popular:realtime gps tracker online

  G07L 4G GPS Tracker

  At the end of the 1950s, the former Soviet Union launched the first man-made earth satellite of mankind. American scientists discovered the phenomenon of Doppler frequency shift in their tracking and research, and used this principle to promote the establishment of the Doppler satellite navigation and positioning system TRANsIT, which has achieved great success in military and civil aspects. It is a leap in the history of navigation and positioning. China has also introduced several Doppler receivers, which are used in island joint survey Earth exploration and other fields. However, due to the low orbit height and signal carrier frequency of the Doppler satellite, it is difficult to improve the orbit accuracy, which makes the positioning accuracy low to meet the requirements of geodesy or engineering survey, and it is impossible to apply it to the research of astrogeodynamics. In order to improve the accuracy of satellite positioning, the United States began to build the Global Positioning System (GPS) in 1973. After entering the phase of scheme demonstration and system test, the official working satellite was launched in 1989, and was completed and put into use in 1994. The space part of the GPS system is composed of 21 satellites, which are evenly distributed on 6 orbital planes. The ground height is more than 20000 km, the orbital inclination is 55 degrees, the flat heart rate is about 0, and the period is about 12 hours. The satellite transmits carrier signals of two bands to the ground. The carrier signal frequencies are 1575.442 MHz (L1 band) and 1227.6 MHz (L2 band) respectively. The satellite is equipped with atomic clocks with high accuracy to ensure the stability of the frequency, The broadcast ephemeris representing satellite position, C/A code and P code used for ranging, and other system information are modulated on the carrier wave, which can provide high-precision, all-weather, continuous, real-time three-dimensional velocity measurement, three-dimensional positioning, and time service to any number of users worldwide.

  The control part of the GPS system consists of five monitoring stations located in the United States. These stations continuously observe the GPS satellites and update the calculated and predicted information from the injection station to the satellite information.


Read recommendations:

apple airtags

fleet gps trackers supplier

G06L- 4G Car GPS Tracker

GPS vehicle tracking and dispatching function

How to realize the function of GPS monitoring system?

Last article:GPS Capabilities

Next article:International GPS development

Related Information

gps tracker online wholesale

2023-04-23

fleet solution webfleet solutions

2023-03-16

Gps speed limiter distributors

2023-04-23

personal gps tracker wholesaler

2023-03-16

4G GPS Tracker for vehicles maker

2023-04-23

Pet GPS Tracker sales

2023-04-11

Gps speed limiter Production

2023-04-23

fleet tracking mobile app

2023-03-16

gps tracker no monthly fee

2023-04-23

gps vehicle tracker Vendor

2023-04-23

4G Wired GPS Tracker PCBA

2022-06-17

C32Plus (9~90V E-bikes/Motorcycle/Car gps tracker)

2022-06-21

TK08AL- RFID Car GPS Tracker

2023-10-07

VSL100 GPS Speed Limiter, Speed Governor

2022-06-19

G09L -6 inch Tail light tracker

2022-06-20

GPS vehicle tracking and dispatching function

2022-12-01

Brief analysis of the benefits of installing vehicle positioning system.van tracker webfleet solutio

2023-03-13

Overview of the car navigation system.Magnetic gps tracker Manufacturing

2023-05-18

GPS vehicle satellite positioning simulation system design

2023-02-06

What affects the use time of the car GPS positioner.vehicle gps tracker webfleet solutions

2023-03-14

GPS, crawling in chaos

2022-12-20

The current status and development trend of China's car navigation industry.gps tracker for trailer

2023-05-17

A GPS satellite

2022-10-12

Three Wiring Route Finding Methods for GPS Positioners

2023-06-27

Types of GPS chips used by common GPS receivers

2022-12-30

How can the function of the car GPS positioner meet the needs of users?fleet management software web

2023-03-21

Strong magnetic wireless gps tracker G11A

2022-09-09

Teach you to find a high -quality GPS positioner manufacturing supplier.fleetmanagement webfleet sol

2023-03-22

The significance of GPS positioning technology in the construction machinery industry.obd2 gps track

2023-03-16

GPS positioning accuracy

2023-02-01