source:truck tracking webfleet solutions release time:2023-04-18 Hits: Popular:realtime gps tracker online
1. Satellite trajectory
There are 24 GPS satellites orbiting the earth along six orbits (every four satellites in a group). Generally, no more than 12 satellites are on the same side of the earth. Most GPS receivers can track 8 to 12 satellites. At least 3 satellites are required to calculate LAT/LONG (2D) coordinates. Add another one to calculate 3D coordinates. For a given position, the GPS receiver knows which satellites are nearby at this time, because it continuously receives update signals from satellites.
2. Parallel channel
Some consumer GPS devices have 2-5 parallel channels to receive satellite signals. Because at most 12 satellites may be visible (the average is 8), this means that the GPS receiver must access each satellite in order to obtain information about each satellite.
Most GPS receivers on the market are 12 parallel channels, 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 they can have better reception effect in forest areas. Generally, a 12 channel receiver does not need an external antenna unless you are in a closed space, such as a cabin or carriage.
3. Positioning time
This refers to the time it takes for your GPS receiver to determine its current position when you restart it. For a 12 channel receiver, if you are near the last positioning position, the positioning time is generally 3-5 minutes in cold start and 15-30 seconds in hot start, while for a 2-channel receiver, the cold start time is more than 15 minutes, and the hot start time is 2-5 minutes.
4. Positioning accuracy
The horizontal positioning accuracy of most GPS receivers is about 5m~10m, but this is only when SA is not turned on.
Read recommendations:
NB20 -4G Bluetooth Smart Pet Tracker
The IGS technology of GPS.GPS Tracker for vehicles distributors
How to install and use the Beidou GPS positioner?gps tracker for trailer Manufacturing
Last article:How to connect the mobile phone of the Beidou GPS positioner?gps tracker no monthly fee wholesaler
Next article:New solutions of intelligent GPS anti-theft electronic system for automobiles.gps tracker for kids m
Related Information
GPS Tracking Manufacturing
2023-04-23fleet gps tracking
2023-04-11fleet gps trackers Solution
2023-04-23Dog gps tracker Solution
2023-04-23fleet gps tracking custom
2023-04-23Pet GPS Tracker custom
2023-04-114G GPS Tracker for vehicles
2023-03-16Fleet management expert
2023-03-16gps tracker with magnet wholesale
2023-03-16pet gps tracker cat price
2023-03-16P60L Personal gps tracker
2022-06-21G500L -4G OBD GPS Tracker
2022-09-06G03
2022-06-21VSL100 GPS Speed Limiter, Speed Governor
2022-06-19NB20 -4G Bluetooth Smart Pet Tracker
2022-06-21The editor tells everyone where car GPS is usually installed.obd-II port gps tracker sales
2023-06-16GPS China Beidou navigation satellite
2022-10-20GPS principle
2022-07-21The prototype of the third generation GPS system GPS Blokc III starts testing
2022-12-06GPS positioner manufacturers introduce the stages of the video surveillance software from the system
2023-05-09Preparation before using GPS
2022-12-28The obvious advantages of three generations of GPS products (actual effect)
2022-08-19Type of GPS data format and extraction of positioning information
2022-11-24GPS vehicle navigation system.gps tracker for Car price
2023-08-10How to use the car GPS positioner after installation?plug & play Obd gps tracker Processing
2023-03-28GPS active ranging and passive range.car gps tracker Solution
2023-04-19What is the difference between the Internet of Things card or mobile phone SIM card used?truck track
2023-03-23GPS emergency positioning and assistance products for the elderly.4G GPS Tracker for vehicles distri
2023-08-17Map navigation+fixed point warning+mobile speed measurement function.real-time gps tracking custom
2023-06-07The difference between Beidou satellite and GPS.Pet GPS Tracker Manufacturing
2023-06-13