GPS work by receiving the signal from each satellite sun. This contains information by satellite positioning and time signals, while the receiver GPS to processing the time difference in reception compared to real time. AtWhich has identified its location with the above signal
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.To achieve the accuracy of location search with satellite to satellite at least 4 loved to tell the position on the earth's surface, which is the distance from the 3 satellite with the machine. GPS (red dot) will be able to identify the position on the earth's surface.So that 4 satellite to calculate height in order to make more accurate position
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.Also, the accuracy of identifying the position depending on the position of each satellite sun. That is to say, if the distance between the satellite work apart is the accurate than near.The variance of the atmosphere atmosphere consists of electric charge, humidity, temperature, and density fluctuations at all times, wave when the incident. With various objects to refraction signals that have weakened.Water mist, the leaves will affect the accuracy of the precision. Because if the signal from the satellite refraction will make the values calculated from the receiver เพี้ยนไป.
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