The satellite positioning accuracy is 1.5m, which is plus or minus 1.5?

Dear, the satellite positioning accuracy 1.5m means plus or minus1.5m. ..

This means that in the satellite positioning system, the position accuracy of the target is determined by receiving satellite signals, usually expressed by standard deviation. In this case, the standard deviation is 1.5 m, which means that the position of the target will fall in a circle with a radius of 1.5 m centered on the receiver on average. It should be noted that satellite positioning accuracy is affected by many factors, including satellite signal propagation delay, atmospheric interference, multipath effect and so on. Therefore, the actual positioning accuracy may be higher or lower than this value.

The above is all my reply, I hope I can help you and wish you a happy life ~