Stability Analysis And Research On Positioning Accuracy Of LNCORS

LiaoNing province continuous operation reference station(LNCORS)is in the trial operation stage.It will bring much convenience to the mapping industry.However,the stability and positioning accuracy of the system has been widely concerned.In order to eliminate the user's doubts,it is very important to test and analyze the performance of the LNCORS system.In order to provide accurance and reliable service to the users,this paper will focus on the stability and positioning accuracy of the system.Stability analysis mainly includes data center stability analysis,reference station data quality analysis,time availability analysis,spatial availability analysis,service effectiveness analysis and system compatibility analysis.In the precision measurement,it is well known that the environment around the selected point will affect the accuracy of the CORS system,which is not related to the results of the final evaluation system.This paper presents a non parametric statistical method,which makes up the deficiency of the traditional method.Finally,the positioning accuracy of the LNCORS system is tested by static positioning,dynamic positioning and vehicle navigation,which makes the system more convincing.Through the test and analysis of the whole system,the test results of LNCORS system are superior to the design index,the system runs stably and the positioning accuracy is reliable,and the overall design requirements can be provided for the LiaoNing CORS users with high accuracy.