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:

CantrackGPS

plug & play Obd gps tracker

Mini Sized GPS Tracker PCBA

Principles of GPS System.Cantrack TK100

GPS Navigation receiver

Last article:GPS Capabilities

Next article:International GPS development

Related Information

simple gps tracking manufacture

2023-04-23

Car gps tracking

2023-04-11

gps tracker for trailer

2023-04-11

pet gps tracker cat manufacture

2023-03-16

Cantrack TK100

2023-03-16

car gps tracker price

2023-04-23

vehicle gps tracker webfleet solutions

2023-03-16

Portable car gps systems Manufacturing

2023-03-16

simple gps tracking wholesaler

2023-04-23

4G GPS Tracker for vehicles

2023-04-11

personal gps tracker Production

2022-09-06

G900LM-4G Car GPS Tracker

2025-03-25

10000mAh Magnetic Asset GPS Tracker

2025-04-08

G02M Pet Tracker

2022-06-19

G183 serials -JOBD GPS Tracker

2022-09-06

GPS navigation satellite has a high-precision atomic clock for time service

2022-11-25

What are the basic features of GPS module at vehicle gauge level

2022-11-22

Does the charging speed of lithium battery affect the battery degradation?

2022-10-18

positioning system

2023-06-01

GPS data

2022-10-22

How accurate is GPS positioning?

2022-10-26

A - GPS positioning

2022-10-25

How to find the GPS locator on the car?obd2 gps tracker verizon supplier

2023-03-16

What are the differences between car navigation and mobile phone navigation?gps tracker with magnet

2023-04-11

Introduction to GPS module.Dog gps tracker manufacturer

2023-07-12

Gps speed limiter.What should be paid attention to when installing GPS locators on rental company ve

2023-10-20

GPS application field

2022-12-29

GPS death phenomenon

2022-09-14

GPS car driving recorder escorts safe driving

2022-09-21

The manufacturer summarizes all the functions of the monitoring system

2023-05-09