source:Industry News release time:2023-02-08 Hits: Popular:realtime gps tracker online
1. Satellite trajectory
Here are 24 GPS satellites running around the earth along six orbits (a group of four). Generally, there are no more than 12 satellites on the same side of the earth. Most GPS receivers can track 8-12 satellites. Calculating LAT/Long (2D) coordinates requires at least 3 satellites. You can calculate 3 -dimensional coordinates. For a given position, the GPS receiver knows which satellites are near at this time because it constantly receives a update signal from the satellite.
2. Paying channel
Some consumer GPS devices have 2 to 5 parallel channels to receive satellite signals. Because at most 12 satellites are visible (the average is 8), which means that the GPS receiver must access each satellite in order to obtain the information of each satellite.
Most of the GPS receivers on the market are 12 parallel channel types, which allows them to continuously track the information of each satellite. The advantages of the 12 -channel receiver include the information of the fast -cold start and initialization satellite. Good receiving effect. Generally, the 12 -channel receiver does not require an external antenna, unless you are in a closed space, such as the cabin and compartment.
3. Positioning time
This means that when you restart your GPS receiver, it determines the time required for the current location. For the 12 -channel receiver, if you are near the last positioning position, the positioning time when the cold start is generally 3-5 minutes, and the hot start is 15-30 seconds. For the 2 channel receiver, most of the time when the cold starts exceeds more than the cold startup exceeding the starting start, most of the when the cold starts exceeds more than the cold startup exceeding the starter. 15 minutes, 2 to 5 minutes at the time of hot start.
4. Positioning accuracy
The level positioning accuracy of most GPS receivers is about 5m to 10m, but this is only when SA is not turned on.
5. DGPS function
In order to minimize the impact of the refraction of the SA and the atmosphere, there is a device called the DGPS sender. It is a fixed GPS receiver (set in a radius of 100km to 200km at a exploration site) to receive the satellite signal. Compared, then calculated the "difference", which is very close to the impact of the refraction of SA and the atmosphere. It sends this difference, and other GPS receivers can use it to obtain a more accurate position reading (5m to 10m or less or less Error).
Read recommendations:
Introduce the different types of the positioner
GPS performance indicators.GPS Tracker for vehicles Solution
Last article:GPS positioning monitoring system
Next article:GPS navigation solution
Related Information
car gps tracker sales
2023-04-23mini gps tracker manufacture
2023-04-23Pet GPS Tracker custom
2023-04-11pet gps tracker cat manufacture
2023-03-16gps vehicle tracker
2023-04-11obd-II port gps tracker
2023-04-234G GPS Tracker for vehicles
2023-04-11Pet GPS Tracker Vendor
2023-03-16fleet gps trackers
2023-04-234G GPS Tracker wholesaler
2023-04-233000mAh Magnet Asset GPS Tracker
2025-03-31G02M Pet Tracker
2022-06-19P901 4G ID Card GPS Tracker Smart Walkie-talkie
2025-07-11TK100B- Accurate Pro version GT06/TK100
2023-10-06G01 Smallest Personal Old People Mini GPS Tracker for Kids
2022-06-19What can GPS do besides navigation?
2022-08-25The relationship or connection between LBS and gps tracker
2022-09-15The market for electric vehicle GPS positioner is huge.realtime gps tracker online Manufacturing
2023-03-09GPS commonly used term.obd2 gps tracker verizon price
2023-06-05Advantages of traditional GPS and new technology GPS solutions
2022-10-15GPS test set
2022-11-09Issues to pay attention to when selecting a strong magnetic l.gps tracker device wholesaleong standb
2023-09-16GPS pseudo -distance measurement introduction.car gps tracker supplier
2023-04-19Timing method of GPS synchronous clock
2022-11-18GPS application layer.plug & play Obd gps tracker wholesale
2023-08-16What should I do if GPS equipment is always demolished?
2023-02-14GPS Global Satellite Positioning System
2022-10-10The difference between GPS positioning and GPS navigation tools.plug & play Obd gps tracker supp
2023-05-09The Application of GPS in Military Affairs.gps tracker with magnet distributors
2023-09-09The principle of GPS indoor positioning technology
2022-08-12