Timing method of GPS synchronous clock_truck tracking webfleet solutions_Huizhou Cantrack Technology Co., Ltd.

   1.1 Introduction to GPS  GPS (Global Positioning System) is a new generation of satellite navigation, time service and positioning system developed by the United States in the 1970s. Each of the 2

truck tracking webfleet solutions

Home > NEWS > Other information > truck tracking webfleet solutions > Timing method of GPS synchronous clock

Company News

Industry News

Timing method of GPS synchronous clock

source:truck tracking webfleet solutions release time:2022-11-18 Hits:     Popular:realtime gps tracker online

  G05N Vehicle Tracker

  1.1 Introduction to GPS

  GPS (Global Positioning System) is a new generation of satellite navigation, time service and positioning system developed by the United States in the 1970s. Each of the 24 dedicated GPS satellites has its own atomic clock, which can broadcast accurate UTC standard time to the ground 24/7. In the data stream decoded by many universal GPS decoding chips, in addition to location information, it also contains time information (year, month, day, hour, minute, second) and PPS (Pulse Second). PPS identifies the starting point of time information, and its accuracy can reach microsecond level.

  1.2 Introduction to timing method

  NTP is a protocol used to synchronize computer time. Its synchronization clock source is not limited to the network time server, but also includes clock devices, such as quartz clock, atomic clock, GPS receiver, etc. The NTP server software abstracts these clock sources into corresponding data structures, corresponding to different memory addresses, and synchronizes the computer clock by reading the information in the address and performing statistical algorithm processing.

  There are mainly three time calibration schemes using GPS as the synchronous clock source: pulse synchronization mode, serial synchronization mode and integrated mode. The GPSD timing scheme adopted in this paper is a comprehensive way. The comparison of the three methods is shown in Table 1.

  1.3 Integrated timing based on GPSD

  GPSD (GPS Daemon) is a daemon software used to process the data decoded by the GPS receiving unit. The specific process of GPSD based integrated timing is shown in Figure 1. The GPS antenna receives the GPS signal, transmits it to the G591 chip for decoding, and outputs the data and PPS signal in NMEA0183 protocol format every second. After the MAX 232 completes the level conversion, it transmits them to the computer via the RXD and DCD ends of the serial port respectively; After processing, GPSD software writes accurate time information to specific memory segments; NTP server software reads the time information in this address segment by sharing memory, and then completes the work of correcting the system clock.


Read recommendations:

fleet solution webfleet solutions

pet gps tracker cat wholesaler

3000mAh Magnet Asset GPS Tracker

What is the difference between vehicle GPS positioning system and vehicle management system?GPS Trac

The relationship between GPS and Beidou navigation?Asset tracking wholesaler

Last article:GPS radar detector

Next article:High precision timing system based on GPSD

Related Information

realtime gps tracker online

2023-04-11

vehicle gps tracker Factory

2023-04-23

trailer gps tracker

2023-03-16

Dog gps tracker Vendor

2023-04-23

pet gps tracker cat custom

2023-04-23

Gps speed limiter Production

2023-04-23

obd-II port gps tracker

2023-04-23

Gps speed limiter equipment

2023-04-23

Portable car gps systems Manufacturing

2023-03-16

gps tracker for bike Factory

2023-04-23

NB20 -4G Bluetooth Smart Pet Tracker

2022-06-21

G09L -6 inch Tail light tracker

2022-06-20

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

2022-06-21

3 Years Disposable Asset GPS Tracker

2025-03-31

G01 Smallest Personal Old People Mini GPS Tracker for Kids

2022-06-19

What is the difference between GPS and GPRS?

2022-12-14

GPS positioning manufacturer compares car navigation and mobile navigation.gps tracker no monthly fe

2023-04-08

GPS predecessor

2023-06-01

Micro Tracking Locator

2022-09-21

gps tracker is very power hungry?

2022-09-19

Japan develops global positioning system independently

2022-09-05

What does the gps fee for buying a car mean?

2022-08-12

Various GPS systems.4G GPS Tracker for vehicles Production

2023-08-22

What are the different types of car GPS?

2023-06-15

Causes of GPS Positioning Drift

2022-09-20

The following aspects mainly affect the performance of GPS antenna

2022-11-12

GPS system architecture and analysis

2022-12-08

When the car stops mobilizing, will the car GPS positioner consume power?

2023-02-14

Differences between GPS monitoring platform BS and CS

2022-12-14

What are the advantages of electric vehicle GPS positioner?

2023-04-03

Related Articles

How to solve the problem of inaccurate car GPS locators?

    Firstly, let's take a look at why GPS locators are inaccurate and have large errors.  GPS positioning accuracy, generally within 10 meters if obtaining Beidou or GPS signals; If it is a signal...

2024-10-09
Know more >

GPS Differential Positioning Technology

    GPS differential positioning technology is an important method to improve the positioning accuracy of the Global Positioning System (GPS).  In traditional GPS positioning, satellite signals are af...

2024-09-29
Know more >

mini gps tracker

  Vehicle GPS Navigation System  Vehicle mounted GPS navigation system is an indispensable and important device in modern automobiles, providing drivers with convenient and accurate navigation service...

2024-09-28
Know more >

Handheld GPS positioning device

    Handheld GPS positioning device is a portable and practical positioning tool widely used in outdoor exploration, geological exploration, forestry investigation and other fields.  Handheld GPS posi...

2024-09-27
Know more >

High precision GPS locator

    In modern society, high-precision GPS locators play a crucial role. It has brought many conveniences to people's lives and work with its excellent positioning accuracy and reliable performance...

2024-09-26
Know more >

Real time GPS tracker

    Real time GPS tracker is an advanced technology device that can track target objects in real-time at any time and any place, bringing great convenience to people's lives and work.  The core fu...

2024-09-25
Know more >
Get a Quick Quote WhatsApp