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:

Dog gps tracker wholesaler

gps tracker no monthly fee supplier

G900LS-4G Car GPS Tracker

How to prevent the disassembly of the car GPS locator?personal gps tracker manufacturer

GPS setting RF front end

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

Next article:GPS Tracker.Application of GPS module

Related Information

gps vehicle tracker maker

2023-04-23

fleet gps trackers supplier

2023-04-23

4G GPS Tracker for vehicles sales

2023-04-23

GPS Tracking company

2023-04-11

Dog gps tracker wholesale

2023-04-23

personal gps tracker

2023-03-16

gps vehicle tracker wholesale

2023-04-23

Pet GPS Tracker manufacture

2023-03-16

GPS Trackers company

2023-04-11

rastreador tracker

2023-03-16

10000mAh Magnetic Asset GPS Tracker

2025-04-08

GF70L-Solar Magnetic Asset GPS Tracker

2023-10-07

G900LS-4G Car GPS Tracker

2023-10-06

GF20-Mini Magnet GPS Tracker

2022-06-21

3000mAh Magnet Asset GPS Tracker

2025-03-31

The strategic role of satellite positioning system and commercial interests

2022-11-26

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

2023-05-09

GPS satellite error.realtime gps tracker online manufacturer

2023-04-23

GPS navigation phone.portable gps tracker Solution

2023-06-07

GPS navigation function

2022-07-23

Schematic diagram of GPS satellite navigation system

2022-12-29

Gps speed limiter.Basic knowledge and performance indicators of automotive GPS locators

2023-11-09

Key Points for GPS Purchase.gps tracker no monthly fee wholesale

2023-08-10

Consolidate the foundation of information construction

2022-12-17

About GPS electronic dogs.realtime gps tracker online custom

2023-05-19

GPS anti -theft electronic system

2023-02-08

The Application of Vehicle GPS in Enterprise Vehicle Management.gps tracker device wholesaler

2023-06-25

CDMA mobile phone GPS positioning

2022-10-21

What factors can interfere with the signal of a car GPS locator.simple gps tracking

2023-09-18

System Composition of GPS PPS Clock Synchronization Technology

2022-11-11