Performance Analysis of the QZSS Regional Satellite Navigation System
In view of the current situation that the international GNSS Monitoring and Assessment System (iGMAS) has less research on the performance evaluation and analysis of Japan's Quasi-Zenith Satellite System (QZSS),the research is carried out from the two aspects of QZSS signal-in-space accuracy and QZSS enhanced GPS service performance analysis. The accuracy of QZSS system broadcast orbit,clock error,signal-in-space ranging error (SISRE),the coverage and positioning accuracy of the single QZSS system and the combined mode of QZSS and GPS are analyzed. Finally,the measured data from observation stations of the international GNSS service (IGS) experimental tracking network (MGEX) are used for verification. The results show that the signal-in-space ranging er-ror of QZSS is better than 1 meter,and the day series variation of orbit and clock error fluctuates between-2 and 2 meters;the en-hancement of GPS position is mainly reflected in the north (N) and up (U) directions,with the improvement ratio of about 11.7％ and 22.6％ respectively,and 20.0％ in the three-dimensional (3D) directions.
万方数据
维普
