? Precise positioning, location of satellite is a very important factor, the stateis the 3 corners of the strong signal of satellites to equilateral triangle distribution inTianqiong, relative distance as far as possible, not arranged in a straight line approximation, which is decided by the mathematical principles of GPS. The above said, the technology of error also only uncontrollable, belonging to the "scourge"category, since ancient times, "natural disasters" is always cannot do without "man-made", when science and technology development level has been enough to put these error dropped to very low, you will find another very embarrassed the question is: I don't want you to get such a high precision. As we all know, civil and military GPSreceiving frequency is not the same, civilian have scrambling, is designed to give you trouble with!

Understand the above content, you will find, too many influencing factors to the positioning accuracy, GPS, also cause you stood immobile moment, every secondcalculated different coordinate position you, when these points into line, you seenever runs smooth trajectory the other people very worried, but a mess, this is what we usually discuss more drift.