truck tracking webfleet solutions

Home > NEWS > Other information > truck tracking webfleet solutions

Company News

Industry News

Dog tracker.The positioning principle of GPS module

source:truck tracking webfleet solutions release time:2024-03-04 Hits:     Popular:realtime gps tracker online

  

  Roughly speaking, the ground coordinates and their conventional geographic features (i.e. spatial resection) are obtained by measuring the distance from an in orbit satellite (which determines it to be a known data) to a ground point. Because the position variables in the equation include XYZ and clock deviation T, the number of accepted satellites must be greater than or equal to 4.

  In the positioning process, there are two methods to obtain the pseudorange (i.e. the distance with errors) from the satellite to the ground: 1. ranging code; 2. Carrier phase.

  1. The ranging code belongs to pseudo-random noise code, which is a binary code sequence. The key is to measure the time difference between the transmitted signal and the received signal, which is obtained through atomic clock synchronization. Due to the refraction of the carrier wave carrying the ranging code when passing through the current layer, ionospheric errors are generated. Solar activity has an impact on the total electron density of the ionosphere, so it can also have an impact on GPS positioning. According to our teacher, there was a period of time when GPS could not be used due to solar flares.

  2. If a satellite S emits a carrier model (which is used as a ranging signal here), the signal propagates to various places. At a certain moment, the phase of the signal at receiver R is ψ R. At satellite S ψ S. Note that what is mentioned here is ψ R, ψ S is the complete carrier phase, including the entire number of cycles, calculated from the same starting point. The distance between the satellite and the ground ρ=λ ( ψ S- ψ R) .

  As can be seen from the above, if the corresponding phase number is inaccurate or cannot be directly obtained, then GPS will not work. In addition, during the measurement process, if the altitude angle of the satellite (the angle between the satellite and the ground level) is too small, it is also impossible to perform measurement and positioning. In summary, during the measurement period, there were no four or more satellites, the altitude angle was too small, there were obstructions such as high-rise buildings, intense solar activity, the position and operation of satellites in orbit, and the condition of the receiver may all cause GPS to be unable to locate or inaccurate.


Read recommendations:

mini gps tracker Vendor

gps tracker no monthly fee

6000mAh Magnetic Asset GPS Tracker

gps tracker GT03C

GPS helps you avoid electronic eyes

Last article:Gps speed limiter.Working principle of GPS Bluetooth positioning technology

Next article:GPS Tracker.Application of GPS module

Related Information

Cantrack G05

2023-04-23

4G GPS Tracker equipment

2023-04-23

gps tracker fur auto webfleet solutions

2023-03-16

Gps speed limiter sales

2023-04-23

fleet gps tracking distributors

2023-04-23

Gps speed limiter company

2023-04-23

pet gps tracker cat manufacture

2023-03-16

GPS Tracking company

2023-04-11

real-time gps tracking Factory

2023-04-23

GPS Trackers company

2023-04-11

TK08AL- RFID Car GPS Tracker

2023-10-07

VSL100 GPS Speed Limiter, Speed Governor

2022-06-19

G08L - 4inch Smart Tail Light Tracker

2022-06-20

P60L Personal gps tracker

2022-06-21

G900LS 8 Lines-4G Car GPS Tracker

2025-03-31

How to reduce the risk of car loan in car positioning terminals

2023-02-16

Everyone analyzes the concerns of buying a car GPS.gps tracker for trailer distributors

2023-05-09

How to choose the installation location of the wireless GPS positioner?4G GPS Tracker for vehicles

2023-03-22

Why does the GPS positioning accuracy require high requirements

2023-03-07

Why is the gps tracker showing offline?

2022-09-08

GPS monitoring service platform.car gps tracker manufacturer

2023-07-07

GSM function of GPS.gps tracker no monthly fee Production

2023-08-15

Vehicle trajectory knowledge of vehicle GPS positioner popularization.gps tracker no monthly fee

2023-03-22

What should I do if I encounter an offline alarm in the car GPS positioner?realtime tracking device

2023-03-24

Why can't the indoor GPS positioning cannot be achieved.fleetmanagement webfleet solutions

2023-02-24

Independent GPS.fleet gps tracking wholesale

2023-07-05

What is the effect of a manufacturer sharing the car positioner?plug & play Obd gps tracker whol

2023-04-14

Bluetooth GPS.obd2 gps tracker verizon sales

2023-08-03

Gps speed limiter.How to use mobile phones to locate and track vehicles with GPS installed

2023-10-28

Disadvantages of Bluetooth GPS receiver.fleet tracking mobile app

2022-11-16