| In order to improve the convergence speed of precise single point positioning and promote its application in surveying and mapping,which accelerates the deep research of theory and methods of precision point positioning.To add the multipath error correction value for improving random weighting model in height angel,and to adopt the high precision troposphere netting correction value for replacing saastamoinen as main research methods of tropospheric delay estimation model,which conducts multiple comparative experimental research based on the GPS/BDS combination precision point positioning.It used Chinese area and circumjacent 29 MGEX station,and also 6 stations from Chaofeidian area in Tangshan to obtain the GNSS observe value,which verifies the modified model and parameters,the results are following:On the basic of largely reducing the convergence time of GPS/BDS combination precision point positioning,Firstly it would take the methods of high precision troposphere netting to directly modify the delay error of flow layer to pseudo-distance observation,reduce the calculate and PPP convergence time.The results show that are compared with traditional troposphere model modify methods,which has reduced 13% and 16% of convergence time in direction of N and U,and had no obvious changed in direction of E.Secondly it improves multiple error manage model to deeply reduce 15% of average convergence time in 29 testing station.Finally,it conducted different height of test in Caofeidian area of Tangshan with those above methods,and achieved the precision results of about 18.6min;it provides the references for GNSS receiver parameters setting,which conducted precision point positioning in Caofeidian area of Tangshan.In this way,it could accelerate the rate of convergence of precision point positioning,and it also provide the reference ideas for accelerating the rate of convergence of precision point positioning.Figure 24;Table 11;Reference 60... |
PDF Full Text Request