1. Recognize the equipment error. Although the satellite is equipped with an atomic clock with high accuracy, the atomic clock still has errors. Although the satellite orbit itself is very high, but it receives the influence of the earth's atmosphere to drift, the receiver's own clock also has errors and noise. These affect the accuracy of positioning, but these are not essential.
2. Indoor activities are indoors. Due to cement walls and other reasons, GPS signals will be weakened accordingly. This will increase the difficulty of the search. This GPS positioning function is almost the same as waste, almost no effect. This time you need help with other positioning technologies (base stations, WiFi, etc.).
3, indoor static is also in the room, but when your car is still in the indoor space, positioning may not be so bad. However, there are currently some high-end car locators built-in WiFi capabilities, but this does not seem to have any X use. Without the help of an indoor locator, even a high-speed WiFi connection cannot be precisely positioned.
4, outdoor activities and static In general, in the absence of buildings or other obstacles outdoors, the GPS signal received should be the strongest, that is to say the positioning system of the car locator function is the most accurate.
5. Atmospheric disturbances GPS sends timing signals via radio waves. When GPS signals pass through the ionosphere (on some charged particles) and the vapor on the troposphere, the signal produces hysteresis delays. These delays cannot be predicted in advance, because they are affected by the weather and they are also affected by the atmospheric environment. The influence of typical atmospheric delays is taken into account in good receivers, and corresponding corrections are made, but it is impossible to change the atmosphere. A real-time, accurate mathematical model was made, so the atmospheric delay effect on the timing signal still exists, which is another reason that affects the positioning accuracy.