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:

rastreadores gps

gps tracker app price

4G Wired GPS Tracker PCBA

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

What is the difference between GPS and GPRS?

Last article:GPS Capabilities

Next article:International GPS development

Related Information

gps tracker with magnet wholesale

2023-03-16

rastreadores gps

2023-03-16

Secumore

2023-03-16

Car gps tracking price

2023-04-11

mini gps tracker price

2023-04-23

gps tracker for trailer

2023-03-16

gps vehicle tracker Processing

2023-04-11

gps tracker for Car

2023-04-11

portable gps tracker

2023-04-11

4G GPS Tracker for vehicles Processing

2023-04-23

P901 4G ID Card GPS Tracker Smart Walkie-talkie

2025-07-11

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

2022-06-21

GF70L-Solar Magnetic Asset GPS Tracker

2023-10-07

TK100B- Accurate Pro version GT06/TK100

2023-10-06

G900LM-4G Car Mini GPS Tracker

2025-03-25

Origin of GPS development

2022-12-29

Requirements for GPS logistics tracking and monitoring

2023-02-02

GPS performance index

2023-02-08

GPS navigator hardware common problems and solutions

2022-08-08

Introduction to GPS in Wildlife Protection.obd2 gps tracker verizon manufacture

2023-05-06

GPS positioner manufacturers introduce the stages of the video surveillance software from the system

2023-05-09

Pet intelligent positioner escort your pet security safety

2023-02-17

How to implement the GPS monitoring system function?

2023-02-11

The hidden installation location of the wireless car GPS positioner.plug & play Obd gps tracker

2023-03-28

Do not illegally install GPS trackers

2022-09-14

GPS military application introduction.realtime gps tracker online supplier

2023-05-06

What are the precautions for installing the car GPS positioner

2023-02-25

Introduction to GPS module.Dog gps tracker manufacturer

2023-07-12

Car GPS Navigation System Operation

2022-11-04

Troubleshooting the cause of vehicle GPS locator offline and intermittent data.4G GPS Tracker

2023-09-21