People who have used GPS for car positioning know that they will experience drifting GPS positioning at any time, especially when the vehicle speed is too fast or stationary. This can not help but wonder if it is not a bad product. In fact, a certain range of GPS drift is a normal phenomenon.
What is GPS drift?
GPS drift refers to the fact that there is a large gap between the GPS position and the actual position, and there are continuous trajectories in the movement that are separated from the actual route. When the speed of current car GPS products exceeds 40Km/h, the signal reception will be more or less "drift". This is a normal phenomenon because the accuracy of the existing GPS in the static state is only 5-20 meters.
GPS drift causes
1, GPS satellites, satellite signal propagation process and ground receiving equipment will produce errors on GPS measurements, such as GPS star search signal, GPS can not locate GPS search star. Or when it is affected by some weather, the accuracy of GPS positioning will also be affected when houses are covered.
2. The GPS device is not calibrated when it leaves the factory, resulting in a fixed position offset between the actual positioning and the map display.
3, GPS device CPU processing speed or GPS algorithm is not good enough, resulting in GPS devices in the high-speed motion detection of GPS signals compared with the stop data, there is a period of "drift", thus affecting the positioning accuracy.
4, the general situation is that the faster the speed, the more obvious "drift". At the same time, GPS positioning accuracy is also affected by many factors such as time, location, weather conditions, and so on.
How to reduce GPS drift
From the above we know that the causes of GPS drift mainly boil down to two points: the satellite signal propagation process and ground receiving equipment processing. Therefore, we must start from these two points to solve the error and drift caused by the car GPS positioner.
The first is to improve the technology of terrestrial receiving equipment terminals and reduce the error generated by the signal in receiving and processing calculations.
The second is that the owners try to avoid extreme weather during their use, use them when they are clear, have clear weather, and avoid places with poor signals such as high-rises, viaducts, and remote mountainous regions, so as to minimize the birth error of GPS locators. Drift, of course, it is impossible to completely avoid errors and drift, and the positioning accuracy can only be increased as much as possible.
Vehicle GPS positioning error and drift is normal, and some manufacturers for the benefit of the GPS device shipped without calibration, resulting in a positional offset between the actual positioning and the map display. Hanling Technology has taken some technical measures to deal with errors and offsets in all automotive GPS locator modules. Most of them have set the settings to reduce errors and drift, and they have been trying to improve the positioning accuracy, and owners can use it with confidence. .
What is GPS drift?
GPS drift refers to the fact that there is a large gap between the GPS position and the actual position, and there are continuous trajectories in the movement that are separated from the actual route. When the speed of current car GPS products exceeds 40Km/h, the signal reception will be more or less "drift". This is a normal phenomenon because the accuracy of the existing GPS in the static state is only 5-20 meters.
GPS drift causes
1, GPS satellites, satellite signal propagation process and ground receiving equipment will produce errors on GPS measurements, such as GPS star search signal, GPS can not locate GPS search star. Or when it is affected by some weather, the accuracy of GPS positioning will also be affected when houses are covered.
2. The GPS device is not calibrated when it leaves the factory, resulting in a fixed position offset between the actual positioning and the map display.
3, GPS device CPU processing speed or GPS algorithm is not good enough, resulting in GPS devices in the high-speed motion detection of GPS signals compared with the stop data, there is a period of "drift", thus affecting the positioning accuracy.
4, the general situation is that the faster the speed, the more obvious "drift". At the same time, GPS positioning accuracy is also affected by many factors such as time, location, weather conditions, and so on.
How to reduce GPS drift
From the above we know that the causes of GPS drift mainly boil down to two points: the satellite signal propagation process and ground receiving equipment processing. Therefore, we must start from these two points to solve the error and drift caused by the car GPS positioner.
The first is to improve the technology of terrestrial receiving equipment terminals and reduce the error generated by the signal in receiving and processing calculations.
The second is that the owners try to avoid extreme weather during their use, use them when they are clear, have clear weather, and avoid places with poor signals such as high-rises, viaducts, and remote mountainous regions, so as to minimize the birth error of GPS locators. Drift, of course, it is impossible to completely avoid errors and drift, and the positioning accuracy can only be increased as much as possible.
Vehicle GPS positioning error and drift is normal, and some manufacturers for the benefit of the GPS device shipped without calibration, resulting in a positional offset between the actual positioning and the map display. Hanling Technology has taken some technical measures to deal with errors and offsets in all automotive GPS locator modules. Most of them have set the settings to reduce errors and drift, and they have been trying to improve the positioning accuracy, and owners can use it with confidence. .
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