truck tracking webfleet solutions

Home > NEWS > Other information > truck tracking webfleet solutions

Company News

Industry News

Introduction to GPS module.Dog gps tracker manufacturer

source:truck tracking webfleet solutions release time:2023-07-12 Hits:     Popular:realtime gps tracker online

  

  The GPS positioning module, which we often refer to as the user part, receives and demodulates satellite broadcast C/A code signals like a "radio", with a center frequency of 1575.42MHz. The GPS module does not broadcast signals and belongs to passive positioning. By calculating the pseudo distance with each satellite and using the distance intersection method, the receiver's four parameters of longitude, latitude, altitude, and time correction are obtained. The characteristic is that the point position speed is fast, but the error is large. The initial positioning module requires at least 4 satellites to participate in the calculation, called 3D positioning. Three satellites can achieve 2D positioning, but the accuracy is poor. The GPS module continuously outputs positioning information and auxiliary information in NMEA format through the serial communication port for the receiver to choose applications.

  The * price indicators of GPS module performance mainly include reception sensitivity, positioning time, position accuracy, power consumption, time accuracy, etc. The positioning time of module startup varies greatly under different startup modes. Generally speaking, the cold start time refers to the situation where there is no data stored inside the module that helps with positioning, including ephemeris, time, etc., which is usually nominal within 1 minute; Warm start time refers to the time when there is a relatively new satellite ephemeris inside the module (usually no more than 2 hours), but the time deviation is significant, usually within 45 seconds nominal; The hot start time refers to the situation where the shutdown does not exceed twenty minutes and the RTC time error is very small. Generally, the nominal time is within 10 seconds; Recapturing time is like a car drilling through a tunnel and capturing satellites again when it exits. Generally, the nominal time is within 4 seconds.

  If the module is stored for a long time after positioning, or if the module is transported hundreds of kilometers away after positioning, there will be an ephemeris inside the module, but this ephemeris is incorrect or has no reference significance. In these cases, the positioning time may take several minutes or even longer. So generally, when GPS modules leave the factory, they need to clear the ephemeris and other data inside the module, so that customers can quickly locate them through cold start after receiving the module.

  The positioning accuracy can be evaluated in both static and dynamic situations, and the dynamic positioning effect is superior to static positioning. The nominal positioning parameters of the GPS module refer to measurements made under fully open skies with excellent satellite signals. So it is difficult to achieve the nominal positioning time and positioning accuracy in conventional testing. There are two common ways to describe horizontal positioning accuracy: first? MCEP, namely Circular error probable, means that 50% probability of the measured point is located in a circle with the true coordinate as the center? Within a circle with a radius of m; The second is? M2DRMS, that is, twice the water average root mean square error, means that there is a 95.5% probability that the measured point is located in a circle with the true coordinate as the center? Within a circle with a radius of m.


Read recommendations:

gps vehicle tracker distributors

Dog gps tracker sales

TK100B- Accurate Pro version GT06/TK100

Little White-fronted Goose No. 12 spent nearly 4 months in the summer breeding season near the Berin

How to realize the function of GPS monitoring system?

Last article:Why does the GPS module take a long time to obtain positioning data after being turned on?mini gps t

Next article:GPS module NMEA0183 standard statement.portable gps tracker Factory

Related Information

fleet gps tracking wholesaler

2023-04-23

fleetmanagement webfleet solutions

2023-03-16

4G GPS Tracker for vehicles wholesaler

2023-04-23

simple gps tracking

2023-04-11

Pet GPS Tracker wholesaler

2023-03-16

car gps tracker manufacturer

2023-04-23

4G GPS Tracker for vehicles Vendor

2023-04-23

Car gps tracking manufacture

2023-04-23

cat gps tracker custom

2023-04-11

Pet GPS Tracker wholesale

2023-03-16

P60L Personal gps tracker

2022-06-21

TK103B

2022-06-20

3000mAh Magnet Asset GPS Tracker

2025-03-31

G500L -4G OBD GPS Tracker

2022-09-06

Mini Sized GPS Tracker PCBA

2022-06-17

Application of GPS Earth Powerology.realtime gps tracker online Manufacturing

2023-04-23

GPS management system-efficient management of your vehicle

2023-02-16

Brief analysis of problems and solutions of vehicle location tracker.realtime gps tracker online Pro

2023-03-13

Brief introduction of GPS control part

2022-09-22

GPS angle calculation method

2022-08-16

Introduction to the application of GPS in emergencies.gps tracker no monthly fee Processing

2023-05-06

What positioning is the GPS positioner?

2023-02-17

The concept of static drift of the car GPS positioner and cause.plug & play Obd gps tracker manu

2023-03-25

Introduction to GPS positioning tracker

2022-12-15

The characteristics and composition of the car GPS positioner.mileage tracking webfleet solutions

2023-03-08

Bluetooth GPS related issues.plug & play Obd gps tracker Processing

2023-08-04

The Development of China's GPS Navigation Market.gps tracker for trailer manufacturer

2023-08-25

The manufacturer shared the function of GPS navigation with everyone.gps tracker with magnet price

2023-06-17

Handheld GPS instrument function.simple gps tracking company

2023-07-17

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

2023-03-16