What factors affect the positioning accuracy of gps location tracker device?

GPS positioning is based on observations and measurements of a set of satellites such as pseudorange, ephemeris, and satellite launch time. At the same time, the user clock error must be known. Therefore, in layman's terms, if you want to know the altitude in addition to the latitude and longitude, then you must receive 4 satellites to accurately locate.

Then the positioning accuracy of the gps location tracker device is affected by those factors

1. Atmosphere: The electronic properties of the ionosphere are unstable, which will have a great impact on wireless signals. The troposphere is full of water vapor, which affects the transmission speed of radio waves.

2. Multi-channel interference: GPS signal is repeatedly affected by obstacles near the receiver, such as nearby high-rise buildings, mountains, etc., and sometimes the signal is even completely blocked.

3. The number of currently visible GPS satellites: It is known from the beginning that 4 satellites must be received for accurate positioning. It can be seen that the number of GPS satellites is also an important factor.

4. The distribution of GPS satellites can be seen: if the angle formed by the captured satellites is large, the receiving effect will be better, otherwise, the effect will be poor.

5. Satellite clock and orbit difference:

6. Affected by the environment: such as indoors, underground, water and other places.

7. Man-made interference: For the needs of international security interests, the United States began to implement the so-called SA policy in 1992, which imposed artificial restrictions and interference on the accuracy of positioning.

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