Research On Continuous High Precision Satellite Positioning

With the rapid development of satellite positioning and navigation technology,satellite navigation technology has been integrated with 5G,inertial navigation,visual positioning and other navigation technologies.Navigation systems with enhanced functions are playing an increasingly important role in people’s daily life.The traditional ranging code positioning method is faster but has limited accuracy.This paper focuses on the high precision satellite positioning method,in the experimental environment,the solution of precise point positioning(PPP)mode is realized,and the simulation experiment verifies that the static positioning accuracy reaches centimeter level.Then this paper discusses the shortcomings of PPP positioning mode,and takes GPS satellite positioning system as an example to introduce the common combined positioning method of satellite positioning system and inertial navigation system.PPP positioning mode requires high signal continuity,to reduce the problem of long repositioning time caused by short satellite signal outages in the case of signal loss,fitting method,Inertial Navigation System(INS)method and receiver state method can be used for continuous positioning.This paper founds that all the three methods have some defects,so it is impossible to use one of the methods to carry out continuous high precision positioning through the realization and analysis of the above methods.Aiming at the deficiency of the common combination of satellite positioning system and inertial navigation system,fitting method,INS method and receiver state method in continuous positioning when the signal is lost,this paper presents an improved method for continuous high precision positioning.Based on the state of the receiver and the parameters provided by the inertial navigation system,the method corrects the accumulated errors of inertial navigation system with the state of the receiver.This paper simulates straight and curved trajectories,and uses the improved method for continuous high precision positioning simulation.The simulation results show that the improved continuous high precision positioning method can obtain high precision positioning results in a short time without being affected by the loss of satellite signals,and the positioning results have good continuity.This method increases the signal robustness of the positioning system,is simpler and more direct than the common combination methods.It is a feasible auxiliary positioning method.