source:truck tracking webfleet solutions release time:2023-02-01 Hits: Popular:realtime gps tracker online
When it comes to positioning accuracy, we should talk about SA and AS
What is SA, AS?
There are two kinds of GPS signals: C/A code and P code.
The error of C/A code is 29.3m to 2.93m. The general receiver uses C/A code to calculate the location. For its own safety, the United States added SA (Selective Availability) to the signal in the middle of the 1990s, which increased the error of the receiver to about 100 meters. SA was cancelled on May 2, 2000, so our current GPS accuracy should be within 20 meters.
The error of P code is 2.93m to 0.293m, which is one tenth of that of C/A. But P code can only be used by the US military. AS (Anti Spoofing) is a jamming signal added to P code.
In a word, Lao Mei is also very tired. A lot of satellites were sent for military positioning. Then I thought it was not worth it and wanted to make some money, so I developed signals for civilian use. The accuracy could not be too high, but people cursed me when the accuracy was low. Because GPS is in the hands of the United States. Although it is free to use, it is not practical for other countries to use it. The United States has processed the GPS signals in this area two days ago when it hit Afghanistan, and the positioning accuracy has become lower.
Russia has its own satellite positioning system, Global Navigation Satellite System. Europe should also develop its own positioning system, NAVSAT. China also has its own satellite positioning system, called Beidou, which is a dual satellite system. It can only locate its own country and nearby areas, and is currently only used for the military.
Read recommendations:
C32Plus (9~90V E-bikes/Motorcycle/Car gps tracker)
Last article:The obvious advantages and characteristics of GPS products
Next article:GPS helps you avoid the electronic eye
Related Information
GPS Tracking custom
2023-04-11OBD GPS Tracker sales
2023-03-164G GPS Tracker manufacture
2023-04-23OBD GPS Tracker Vendor
2023-03-16mini gps tracker sales
2023-04-11Best hidden gps trackers
2023-04-11car gps tracker wholesaler
2023-04-23fleet gps tracking manufacturer
2023-04-23gps vehicle tracker supplier
2023-04-11fleet gps trackers Processing
2023-04-23G183 serials -JOBD GPS Tracker
2022-09-06TK103B
2022-06-20TK100 (GT06) Vehicle Tracker
2022-06-20G01 Smallest Personal Old People Mini GPS Tracker for Kids
2022-06-19G07L 4G GPS Tracker
2022-09-06GPS positioner manufacturers introduce the stages of the video surveillance software from the system
2023-05-09Does gps tracker need a data card?
2022-07-18Introduction to GPS Navigation System
2022-11-07What are the emphasis on the installation of the GPS positioner?rastreador de GPS wholesaler
2023-03-16GPS Navigation Information Introduction
2022-09-22Application introduction in GPS Meteorology.obd2 gps tracker verizon Production
2023-05-06Five requirements that a good GPS module must meet
2022-11-07The application of GPS in car navigation and traffic management
2023-06-02Installation method for automotive GPS locator equipment
2023-09-13GPS development mode
2022-11-19Bracelet GPS positioner and anti -lost device!car gps tracker maker
2023-02-18The main uses of GPS
2022-10-10GPS functions.Cantrack Login
2023-09-04Bluetooth GPS.obd2 gps tracker verizon sales
2023-08-03GPS system GPS BLOKC III prototype starts testing
2023-02-03