Performance Analysis And Application Research Of Beidou Satellite Navigation System

This paper focuses on the performance analysis and application research of Beidou satellite navigation system,focusing on the error correction of Beidou satellite pseudorange multipath,GNSS data quality analysis and software development,Beidou space signal accuracy assessment,BeiDou satellite onboard satellite performance evaluation and analysis.Analysis of Relative Positioning Performance of BDS / GPS Combined Dual Systems and Its Application.The following work and research are carried out in this paper:1This article first summarizes the research background and the GNSS data quality assessment analysis technology,Beidou monitoring and evaluation analysis and BDS/GPS combined dual system system combined relative positioning technology research status,and then briefly described the purpose and main content of this article.2 In this paper,according to the observation information of global satellite navigation system,the basic principles of GNSS data quality analysis are introduced in detail.The main contents include some basic observations of satellite navigation and positioning systems,common combined observations,major error sources and some common data quality analysis.Parameters and so on.3 In this paper,aiming at the influence of multipath effect on GNSS navigation and positioning,a study on the pseudorange multipath error of BeiDou satellite is carried out.The relationship between BeiDou satellite pseudorange multipath error and elevation angle and signal to noise ratio is analyzed,and BeiDou satellite pseudorange is analyzed.The correlation strength between multipath error and elevation angle was analyzed.The quadratic polynomial fitting method and wavelet transform method were used to correct the satellite pseudorange multipath.4 In this paper,according to the limitations of the popular GNSS data quality analysis software,a quality analysis software GDQA that can effectively process GNSS data has been developed.The soft operation is convenient and the function is perfect.The editing of GNSS observation files and the quality inspection of observation data are realized.The results of the visualization and other functions,and carried out the analysis of the quality of observation data of China Beidou-3 satel ite.5 In this paper,according to the research status of China's Beidou space signal precision,the definition and calculation process of BDS broadcast track accuracy and broadcast clock error accuracy evaluation are introduced in detail.The user's range error URE(User Range Error)is detailed and the calculation of each system is deduced in detail.Parameters,and with precision ephemeris as reference,Beidou satellite navigation system was evaluated for precision of broadcast orbit,accuracy of broadcast clock error,and accuracy of user distance error URE.6 In this paper,according to the current status of BDS satellite orbital atomic clocks,corresponding indicators,algorithms and models for performance evaluation of satellite-borne atomic clocks are studied.Frequency accuracy,frequency drift rate,frequency stability,and clock error model of C hina BeiDou in-orbit satellite atomic clock are studied.Residual sequence evaluation analysis and clock noise recognition performance evaluation analysis.7 In this paper,a comparatively comprehensive experimental analysis of the relative performance of BDS/GPS positioning relative to the actual measured data is performed,which verifies the feasibility of BDS/GPS combined dual system positioning.Based on the actual measured data,the application of deformation monitoring is analyzed.