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:

fleet gps trackers price

real-time gps tracking Processing

6000mAh Magnetic Asset GPS Tracker

GPS vehicle satellite positioning simulation system design

The GALILEO GPS system consists of 10 signals in four frequency bands.

Last article:GPS Capabilities

Next article:International GPS development

Related Information

real-time gps tracking Factory

2023-04-23

gps vehicle tracker company

2023-04-11

Gps speed limiter

2023-04-11

rastreador de GPS

2023-03-16

GPS Tracker for vehicles Manufacturing

2023-03-16

Gps speed limiter price

2023-04-23

Car gps tracking wholesale

2023-04-23

gps vehicle tracker Manufacturing

2023-04-11

Gps speed limiter Vendor

2023-04-23

fleet gps trackers

2023-03-16

TK100 (GT06) Vehicle Tracker

2022-06-20

GF20-Mini Magnet GPS Tracker

2022-06-21

G07L 4G GPS Tracker

2022-09-06

G200NY -Cow/Camel GPS Tracker

2022-06-21

TK100B- Accurate Pro version GT06/TK100

2023-10-06

GPS application field

2022-12-29

Types of GPS chips used by common GPS receivers

2022-12-01

The function of the car GPS.gps tracker no monthly fee wholesaler

2023-05-13

GPS system composition

2023-02-07

Beiqi Foton independently researches and develops the Internet of Vehicles system, Beidou and GPS du

2022-08-11

Overview of GPS AGC working principle

2022-11-17

Key Points for GPS Selection.Car gps tracking Production

2023-07-20

Beidou Satellite Positioner.hang tag button manufacture

2023-06-06

Features of GPS navigation map

2022-12-14

Portable Wireless GPS Tracker

2022-09-20

The main function of the electric vehicle Beidou GPS positioner

2023-03-06

Introduction to the Functions of GPS/Beidou Satellite Positioning Vehicle Travel Recorder.Car gps tr

2023-09-05

Correct method of using GPS receiver in the field.plug & play Obd gps tracker manufacture.realti

2023-04-13

The GALILEO GPS system consists of 10 signals in four frequency bands.

2022-10-11

Navigation editor introduces the usage method of driving recorder.gps tracker for kids supplier

2023-06-26