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:

4G GPS Tracker for vehicles company

gps vehicle tracker maker

P60L Personal gps tracker

Why is it recommended to install the GPS vehicle positioning system?Portable car gps systems

GPS power consumption and noise

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

Next article:GPS Tracker.Application of GPS module

Related Information

fleet gps trackers Vendor

2023-04-23

mini gps tracker manufacturer

2023-04-23

car gps tracker manufacturer

2023-04-23

realtime gps tracker online

2023-04-11

obd2 gps tracker verizon wholesaler

2023-04-23

Dog gps tracker Processing

2023-04-23

fleet management software webfleet solutions

2023-03-16

Car gps tracking price

2023-04-11

4G GPS Tracker equipment

2023-04-23

gps tracker with magnet wholesale

2023-03-16

3000mAh Magnet Asset GPS Tracker

2025-03-31

G900LS J16-4G Car GPS Tracker

2023-10-06

P60L Personal gps tracker

2025-07-11

TK103B

2022-06-20

G900LM J16-4G Car GPS Tracker

2025-03-25

Centimeter -level high -precision 4G full Netcom GPS positioner.fleet management software webfleet s

2023-03-08

Recommended Minimum Specific GPS/TRANSIT Data (RMC) GPS recommended positioning information

2022-09-28

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

2023-03-16

Basic architecture of GPS receiver

2022-10-15

Can the GPS positioning system help the breeding industry save costs?

2023-02-22

LBS(Galileo) positioning

2022-10-25

Problems related to the use and operation of GPS.mileage tracking webfleet solutions

2022-11-16

The manufacturer introduced in detail what applications of GPS in aviation flight navigation.gps tra

2023-04-25

How to purchase GPS.gps tracker with magnet distributors

2023-08-25

GPS signal is briefly introduced

2022-11-02

Civil GPS

2022-12-28

GPS Plan implementation plan

2022-10-12

GPS monitoring system develops rapidly

2023-02-08

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

2023-03-22

GPS ephemeris structure and calculation process

2022-12-10