The GPS locator is a terminal with a built-in GPS module and a mobile communication module. It is used to transmit the positioning data obtained by the GPS module to a server on the Internet through the mobile communication module (gsm/gprs network), so that it can be implemented on a computer. Query the terminal location.

　　1 Principle

　　The spatial distribution of GPS is composed of 24 GPS working satellites. These GPS working satellites together form a GPS satellite constellation, of which 21 are satellites that can be used for navigation and 3 are active backup satellites. The 24 satellites orbit the Earth in 6 orbits with an inclination of 55°. The orbit of the satellite is about 12 sidereal hours. Each GPS working satellite sends out a signal for navigation and positioning. It is with these signals that GPS users do their work.

　　2 Functions and uses

　　general

　　1. Real-time positioning

　　Enterprise managers can locate the current location of subordinate employees at any time

　　The map gives the punctuation of the location of the located employee. Move the mouse to the punctuation, and the system gives the employee name, positioning time and description of the current location.

　　2. Trajectory tracking

　　Just set the time period, you can query the activity trend and trajectory of an employee in this time period. The system also gives the employee name, positioning time and description letter of the current location for each punctuation.

　　3. Attendance report

　　Set a time period to view the attendance status of all employees yesterday, and you can also view the detailed attendance list of an employee within a certain time period. The detailed attendance list can view the positioning time and location description information of all punctuation points, and support excel table export, which is convenient for enterprise personnel management.

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