The positioning system of the Public Security Bureau is divided into two kinds

The first kind: (error 500 meters) cell phone number positioning (also called base station positioning), China Mobile, China Telecom, China Unicom three operators. You need to hold myself and the positioning of the party's cell phone and ID card to obtain authorization directly from the other party, and each time the positioning of the other party needs to be authorized to agree. Non-authorized, that is, unlimited each other's authorization, only the national security and public security departments can be used legally, and there are strict approval procedures, the general public simply can not be used.

The second type: GPS positioning, (error less than 10 meters), in short, is based on known satellite orbit information and ground user observation data, after data processing and thus solved the receiver position and carrier movement speed.