What are the accuracy evaluation indicators for absolute positioning?
The accuracy evaluation indicators of absolute positioning include positioning error, accuracy circle, positioning accuracy index, positioning reliability, dynamic positioning accuracy, etc. Detailed introduction: 1. Positioning error refers to the difference between the actual positioning result and the real position. Common positioning error indicators include horizontal positioning error, vertical positioning error, etc.; 2. The accuracy circle refers to the area where the positioning result is located, also called the confidence interval. It is usually expressed in the form of probability. For example, a 95% accuracy circle indicates that there is a 95% probability of finding the true position in this area; 3. Positioning accuracy index, etc.
Operating system for this tutorial: Windows 10 system, Dell G3 computer.
The accuracy index of absolute positioning can be evaluated from the following aspects:
Positioning error: Positioning error refers to the difference between the actual positioning result and the real position. Common positioning error indicators include horizontal positioning error (Horizontal Position Error, HPE), vertical positioning error (Vertical Position Error, VPE), etc.
Precision circle: The precision circle refers to the area where the positioning result is located, also called the confidence interval. Usually expressed in the form of probability, for example, a 95% accuracy circle means that there is a 95% probability that the true position can be found in this area.
Position Dilution of Precision (PDOP): PDOP is an index used to evaluate positioning accuracy. It reflects the impact of the geometric configuration of the positioning system on positioning accuracy. The smaller the PDOP value, the higher the positioning accuracy.
Positioning reliability: Positioning reliability refers to the stability and reliability of the positioning system under different environmental conditions. For example, the positioning system may be affected by buildings, obstructions, etc. in complex urban environments, resulting in a decrease in positioning accuracy.
Dynamic positioning accuracy: Dynamic positioning accuracy refers to the positioning accuracy in the moving state. Due to factors such as motion blur and multipath effects during movement, dynamic positioning accuracy is usually lower than static positioning accuracy.
In short, the accuracy indicators of absolute positioning include positioning error, accuracy circle, PDOP, positioning reliability and dynamic positioning accuracy, etc. These indicators can comprehensively evaluate the accuracy, stability and reliability of the positioning system.
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