source:truck tracking webfleet solutions release time:2022-08-26 Hits: Popular:realtime gps tracker online
1. Satellite track
There are 24 GPS satellites orbiting the earth in six orbits (groups of four), and generally no more than 12 satellites are on the same side of the earth, and most GPS receivers can track 8 to 12 satellites. At least 3 satellites are required to calculate LAT/LONG (2D) coordinates. Add one more to calculate 3-dimensional coordinates. For a given location, the GPS receiver knows which satellites are nearby at the time because it is constantly receiving updates from the satellites.
2. Parallel channel
Some consumer GPS devices have 2 to 5 parallel channels to receive satellite signals. Because up to 12 satellites may be visible (the average is 8), this means that the GPS receiver must visit each satellite in sequence to obtain information about each satellite.
Most GPS receivers on the market are of the 12-parallel channel type, which allows them to continuously track the information of each satellite. The advantages of 12-channel receivers include fast cold start and initialization of satellite information, and can have more information in forest areas. good reception. Generally 12 channel receivers do not need an external antenna, unless you are in an enclosed space, such as a cabin, a car.
3. Positioning time
This is the time it takes for your GPS receiver to determine your current location when you restart it. For a 12-channel receiver, if you are near the location of the last positioning, the positioning time is generally 3 to 5 minutes during a cold start and 15 to 30 seconds during a hot start, while for a 2-channel receiver, the cold start is mostly more than 15 minutes, 2 to 5 minutes during hot start.
4. Positioning accuracy
The horizontal position positioning accuracy of most GPS receivers is around 5m to 10m, but this is only when SA is not turned on.
Read recommendations:
Last article:Introduction to the physical signal of GPS
Next article:Development Trend of Automotive GPS Positioning System
Related Information
cat gps tracker maker
2023-04-11gps tracker for trailer
2023-04-23gps tracker for kids Vendor
2023-04-23GPS Tracking Manufacturing
2023-04-23OBD GPS Tracker Vendor
2023-03-16car gps tracker custom
2023-04-23real-time gps tracking Processing
2023-04-23portable gps tracker Vendor
2023-04-23Dog gps tracker Factory
2023-04-23mini gps tracker sales
2023-04-11TK100B- Accurate Pro version GT06/TK100
2023-10-06G900LS-4G Car GPS Tracker
2023-10-06G900LS 8 Lines-4G Car GPS Tracker
2025-03-31NB20 -4G Bluetooth Smart Pet Tracker
2022-06-21G05N Vehicle Tracker
2022-06-21How to make the data of the GPS positioner more effective
2023-02-25The manufacturer summarizes the main application scope of Xi'an's long standby GPS.obd2 gps tracker
2023-04-08The advantages of "Galileo" GPS positioning system
2023-02-11The rapid development of GPS monitoring system
2022-08-26The manufacturer believes how to determine the radar, GPS, Beidou and radio positioning.gps tracker
2023-06-17Which industries need to use GPS positioner
2023-03-07What is a satellite trajectory?
2022-10-28The obvious advantages of three generations of GPS products (actual effect)
2022-08-19GPS tracker, what do you want to use?
2022-09-17GPS navigator software.Hidden GPS Trackers wholesaler
2023-06-10Positioning Technology Based on GPS Mobile Network
2022-10-10Gps speed limiter.What are the functions implemented after the installation of the car GPS on-board
2023-10-13Advantages and disadvantages of wireless gps trackers
2022-09-16Principle of GPS indoor positioning technology
2022-11-25Solar GPS positioning tracker solve worries
2023-02-23