What are the characteristics of the global positioning system?

GPS is the most successful satellite positioning system in use andis hailed asa milestone in human positioning technology.To sum up,thesystem has the following characteristics:

(1)Global.allweather continuous navigation and positioning capabilities.GPS can provide continuous,all-weathernavigation and positioning capabilities for all kinds of users in any location or near-earth space around the worid,and users do not need to transmit signals,sothey can meet theneedsofmultiple users.
(2)Real-time navigation,high positioning accuracy.short observation time.When using GPS positioning.location data can be obtained several times within 1s,and this near-realtime navigation capability is ofgreat significance to highly dynamic users, and can provide users with continuous three-dimensional position,three-dimensional speed andaccurate time information.At present,therealtime positioningaccuracy using C/Acode can reach 20-50m,the speed accuracy is 0.1m/s,the use ofspecial

processing can reach 0.005m/s,and the relative positioning accuracy can reach millimeters With the continuous improvement of the GPS system and the continuous update of the software,the current relative static positioning within 20km only takes 15-20min,andwhen therapid static relative positioning measurementwhen each rover and the reference station are within 15km,the rover observation time is only 1-2min,and then it can be located atany time,and each station observation only takesafew seconds