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:
simple gps tracking wholesaler
10000mAh Magnetic Asset GPS Tracker
Car GPS function.GPS Tracker for vehicles distributors
How to solve the car GPS positioner?fleet management software webfleet solutions
Last article:The obvious advantages and characteristics of GPS products
Next article:GPS helps you avoid the electronic eye
Related Information
Cantrack G05
2023-04-11Car gps tracking manufacture
2023-04-23fleet tracking mobile app
2023-03-16Car gps tracking manufacturer
2023-04-23mini gps tracker sales
2023-03-16mini gps tracker sales
2023-04-23gps vehicle tracker Solution
2023-04-114G GPS Tracker for vehicles
2023-04-11Pet GPS Tracker sales
2023-04-11gps vehicle tracking
2023-03-16G500M-Mini GPS Tracker
2022-06-20TK100B- Accurate Pro version GT06/TK100
2023-10-06G900LM-4G Car GPS Tracker
2025-03-25G900LS 8 Lines-4G Car GPS Tracker
2025-03-313 Years Disposable Asset GPS Tracker
2025-03-31Simulator test GPS
2022-10-10How do car loan companies use car GPS to reduce risks?gps vehicle tracker Manufacturing
2023-03-17How accurate is GPS positioning?
2022-10-26What is the Galileo Plan?
2022-12-12Analysis and Design of Vehicle GPS System
2022-09-01GPS Development.gps tracker for trailer distributors
2023-09-09The manufacturer shared the function of GPS navigation with everyone.gps tracker with magnet price
2023-06-17Beidou Satellite Positioner.hang tag button manufacture
2023-06-06Beidou Navigation system-GPS system composition and working principle
2022-10-20Introduction to GPS application scope
2022-12-13How to implement the GPS monitoring system function?
2023-02-11What is the GPS program of Gully?
2023-02-11Difficulties in GPS indoor navigation
2022-11-03Gps speed limiter.The positioning principle of automotive GPS global satellite positioning system
2023-11-17GPS receiver.realtime gps tracker online wholesale
2023-08-22