RESEARCH ON XPL ALGORITHM OF GALILEO INTEGRITY SYSYTEM
Gu Shouzhou 1,2) ; Bei Jinzhong 1,3) ; and Dang Yamin 1,2)
1)Chinese Academic of Surveying and Mapping,Beijing 1000392)Shandong University of Science and Technology, Qingdao 2665103)Wuhan University, Wuhan 430079
Abstract In the Galileo integrity system，to confirm the system working normally and the safety of user, it is important to estimate Horizontal/Vertical Protection Level(XPL) effectively. So it is necessary to test the theory of computing HPL and VPL respectively, analyze the results, and validating the availability of the theory by using the observations. The results show that the maximum calculated values of HPL and VPL are less than 9 meters and 12 meters respectively, so can meet the requirement of limited values: 12 meters and 20 meters, it proves that the theory is efficient and effective. Furthermore, the stability of the theory is proved from the view of the standard deviation.
