source:Industry News release time:2022-07-11 Hits: Popular:realtime gps tracker online
1. Satellite trajectory: There are 24 GPS satellites orbiting the earth along six orbits (in groups of four). Generally, there are no more than 12 satellites on the same side of the earth. Most GPS receivers can track 8 to 12 satellites. satellite. 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 channels: 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 20-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 20-channel receiver does not needTo external antenna, unless you are in an enclosed space, such as cabin, car.
3. Positioning time: This is the time it takes to determine your current location when you restart your GPS receiver. For a 20-channel receiver, if you are near the location of the last fix, the fix time is generally 3 to 5 minutes for a cold start and 15 to 30 seconds for a hot start.
4. Positioning accuracy: The horizontal position positioning accuracy of most GPS receivers is about 2.93m to 29.3m.
5. Signal interference: To give you a good positioning, the GPS receiver needs at least 3 to 5 satellites to be visible. If you're in a canyon or on a street lined with tall buildings, or in a dense jungle, you may not be able to communicate with enough satellites to be able to locate or get only two-dimensional coordinates. Also, if you are inside a building, you may not be able to update your location, some GPS receivers have separate antennas that can be attached to the windshield, or an external antenna that can be placed on the roof of the car, which helps you receivers get more satellite signals.
6. Physical indicators: When purchasing GPS equipment, physical indicators such as size, weight, display screen, waterproof, shockproof, dustproof performance, high temperature resistance, and power consumption must be considered.
7. What is the baud rate of general GPS?
4800. Now there are more and more GPS signs that can provide higher speed, but it is not necessary for GPS applications, and some will cause system instability.
8. Why is my GPS always floating around, even when standing still?
Due to the relatively weak ability to collect satellites, the earlier GPS always had a disconnection, especially when it was used for navigation in the city, which caused a lot of inconvenience to travel. Some civilian GPS chips developed later included GPS signals with insufficient signals, which caused the phenomenon of drift. But in the same situation, the older GPS products will be completely disconnected, and will not start accepting until a satellite with a strong enough signal can be found. So this is a relatively contradictory choice, but with the continuous development and upgrading of software and hardware, I believe this situation will become less and less.
9. I was able to locate yesterday, but I can't locate it today, why?
Generally, the GPS was not properly turned off when it was last used. Please restart the device and connect it again. If it still doesn't work, cold start the GPS. In future use, be sure to disable GPS in the software before turning off or unplugging the GPS receiver.
Read recommendations:
The difference between GPS positioning and mobile positioning.obd2 gps tracker verizon manufacture
Last article:how to install gps locator
Next article:Application of GPS in Logistics Industry
Related Information
Gps speed limiter manufacturer
2023-04-23gps vehicle tracker manufacturer
2023-04-23Gps speed limiter Vendor
2023-04-23GPS Tracker price
2023-04-11Car gps tracking Manufacturing
2023-04-23Dog gps tracker custom
2023-04-23mileage tracking webfleet solutions
2023-03-16Pet GPS Tracker Manufacturing
2023-03-16fleet gps trackers price
2023-04-23Pet GPS Tracker Factory
2023-03-16Mini Sized GPS Tracker PCBA
2022-06-173000mAh Magnet Asset GPS Tracker
2025-03-31G06L
2022-06-21P60L Personal gps tracker
2022-06-21G200(L) -Magnet GPS Tracker
2022-06-20Types of GPS
2022-09-24Development Trend of Automobile GPS Positioning System
2022-12-07High precision timing system based on GPSD
2022-11-18Application of GPS as Satellite Altimeter
2022-08-02GPS Navigation Principle
2022-08-01GPS is classified by the working principle of the receiver.obd2 gps tracker verizon sales
2023-06-05The Application of GPS Navigation System in Road Engineering.4G GPS Tracker for vehicles equipment
2023-08-24GPS monitoring system system function and characteristics
2023-02-11How to use a mobile phone to check the car GPS positioning system?
2023-09-20GPS indoor positioning application
2023-02-15Factors related to GPS satellites
2022-09-22Causes of lithium battery explosion
2022-10-18Development of GPS chips.Car gps tracking manufacture
2023-07-05Serial Number Cable Color Wiring Description (Vehicle Signal Line).obd-II port gps tracker Factory
2023-09-14Student GPS real-time positioning products.plug & play Obd gps tracker manufacture
2023-08-17