At present, the accuracy of civil GPS in the end is how much?
If the weather is clear, there is no serious impact on the signal, then the accuracy can reach zero error, if the weather is bad, there is an impact, the maximum error is not more than 10 meters range.
The navigation accuracy of GPS type belongs to the single point positioning accuracy, probably between 3~15 meters; high precision measurement of GPS generally refers to the accuracy of RTK, to 10 cm; the accuracy of WGS84 coordinates accuracy; usually see vehicle navigation or mobile phone navigation precision is high when there is a map of the correct.
GPS general civil 3M accuracy, military 0.3m. Carrier positioning speed is slow, regardless of civilian or military, precise point positioning, then more than half an hour, if the observation time is long enough to reach mm level accuracy. In addition to differential positioning, accurate location is known one or several points, for those who point to be modified using the location information of several points, can use the mobile phone signal, radio data transmission to the designated station, which quickly and accurately obtain the coordinates of points to be determined, but it is limited to a certain extent the.The positioning accuracy is measured by the coordinate (x, y, z) and reference (ellipsoid, the 3D coordinates of the human definition of direction) of the point on the real coordinates of the gap between the actual coordinates cannot be obtained, the general accuracy is obtained by using the mathematical method of valuation, the probability and statistic.
