Space part: It consists of 24 working satellites and 3 spare satellites,
which are evenly distributed in 6 orbits with an inclination angle of 55°, and
the satellite operation period is 12 sidereal hours.
Ground control part: It consists of monitoring station, main control
station and injection station. The main task of monitoring station is to track
GPS satellites; the main control station is to collect GPS information of
monitoring stations, correct the orbit of satellites and satellite system time,
and Generate the ephemeris of each satellite, etc.; the role of the injection
station is for data transmission between the ground and the satellite.
User part: including various GPS receivers, satellite data processing
software, etc.
advantage
Versatility: Navigation, positioning and timing can be achieved on a global
scale such as ocean, air, and land.
Global: Enable location targeting anywhere in the world.
24/7: Positioning can be done at any time of the day.
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