truck tracking webfleet solutions

Home > NEWS > Other information > truck tracking webfleet solutions

Company News

Industry News

GPS positioning principle.realtime gps tracker online distributors

source:truck tracking webfleet solutions release time:2023-04-13 Hits:     Popular:realtime gps tracker online

  real-time gps tracking

  The GPS receiver can receive time information accurate to nanoseconds that can be used for time service; The forecast ephemeris used to forecast the approximate position of the satellite in the coming months; The broadcast ephemeris used to calculate the satellite coordinates required for positioning, with an accuracy of several meters to tens of meters (different satellites, changing at any time); And GPS system information, such as satellite status.

  The distance from the satellite to the receiver can be obtained by measuring the code of the GPS receiver. Because of the error of the receiver's satellite clock and atmospheric propagation error

  Poor, so it is called pseudo distance. The pseudo range measured for 0A code is called UA code pseudo range with an accuracy of about 20 meters, and the pseudo range measured for P code is called P code pseudo range with an accuracy of about 2 meters.

  The GPS receiver decodes the received satellite signals or uses other technologies to remove the information modulated on the carrier wave

  Recover the carrier. Strictly speaking, the carrier phase should be called the carrier beat phase, which is the difference between the carrier phase of the received satellite signal affected by Doppler frequency shift and the signal phase generated by the local oscillation of the receiver. Generally, the phase change value can be recorded by measuring at the epoch time determined by the receiver clock and keeping track of the satellite signal. However, the initial phase value of the receiver and satellite oscillator at the beginning of the observation is unknown, and the phase integer of the initial epoch is also unknown, that is, the integer ambiguity can only be calculated as a parameter in data processing. The accuracy of the phase observation value is as high as mm, but the premise is to solve the ambiguity of the whole cycle. Therefore, the phase observation value can only be used when there is a relative positioning and a continuous observation value, and the phase observation value can only be used to achieve the positioning accuracy better than the meter level.

  According to the positioning mode, GPS positioning is divided into single point positioning and relative positioning (differential positioning). Single point positioning is a way to determine the position of a receiver based on the observation data of a receiver. It can only use pseudo range observation measurement, which can be used for rough navigation and positioning of vehicles and ships. Relative positioning (differential positioning) is a method to determine the relative position between observation points based on the observation data of more than two receivers. It can use either pseudo range observation or phase observation. Geodetic or engineering measurements should use phase observation values for relative positioning.


Read recommendations:

real-time gps tracking Factory

car gps tracker sales

G500L -4G OBD GPS Tracker

GPS Automotive navigation system.gps tracker device Solution

The advantages of the Beidou satellite positioning system.fleet gps tracking Production

Last article:GPS cannot search for satellite signal problems.plug & play Obd gps tracker distributors

Next article:The strategic role of GPS satellite positioning system and commercial interests.gps tracker no month

Related Information

gps tracker with magnet wholesale

2023-03-16

realtime gps tracker online

2023-04-11

fleet gps tracking Production

2023-04-23

portable gps tracker wholesaler

2023-03-16

fleet gps tracking wholesaler

2023-04-23

obd2 tracker supplier

2023-03-16

gps vehicle tracker price

2023-04-23

4G GPS Tracker supplier

2023-04-23

OBD GPS Tracker sales

2023-03-16

gps tracker no monthly fee

2023-04-11

G02M Pet Tracker

2022-06-19

G900LM-4G Car GPS Tracker

2025-03-25

G900LS 8 Lines-4G Car GPS Tracker

2025-03-31

TK100 (GT06) Vehicle Tracker

2022-06-20

NB20 -4G Bluetooth Smart Pet Tracker

2022-06-21

Here, I want to talk about how to use the GPS receiver practically.

2022-11-26

GPS, get closer to our lives

2023-02-08

Diagnosis and processing of car GPS terminal failure

2023-04-06

How to implement the GPS monitoring system function?

2023-02-11

What information can the vehicle GPS positioning system query?GPS Tracker for vehicles distributors

2023-04-07

GPS vehicle positioning.simple gps tracking Solution

2023-07-04

GPS tracking locator.plug & play Obd gps tracker manufacturer

2023-08-17

Factors related to GPS satellites

2022-10-10

GPS guidance (Bearing)

2022-11-23

GPS positioning monitoring system

2022-12-06

Gps speed limiter.The positioning principle of automotive GPS global satellite positioning system

2023-11-17

Types of GPS chips used by common GPS receivers

2022-12-30

What is the function of gps tracker.mileage tracking webfleet solutions

2023-03-13

What is GPS location time?

2022-10-28

This product focuses on humanized design to minimize the false alarm rate.

2022-12-15