The basic idea of AGPS is to set up a number of reference GPS receiving
machines in a position with a good satellite signal receiving effect, and use
the AGPS server to obtain the thick position of the terminal through the
interaction with the terminal. Then Wait for the auxiliary data to send it to
the terminal, and the terminal is performed by the terminal for GPS positioning.
After the measurement is over, the terminal can calculate the position result or
send the measurement result back to the AGPS server. The server calculates and
returns the result to the terminal. At the same time, the background SP can
obtain location information to other service applications
GPS consists of three independent parts
Space part: 26 working satellites, 6 spare satellites.
Ground support system: 1 main control station, 3 injection stations, 5
monitoring stations.
User device part: Receive the GPS satellite launch signal to obtain the
necessary navigation and positioning information, complete the navigation and
positioning work after data processing.
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