Study on SISMA Index of China Region Integrity Monitoring of Galileo Project

Basic concept of SISMA for integrity monitoring of Galileo system was analysed,corresponding mathematical model of SISMA and data processing method was discussed,SISMA for integrity monitoring of global and China region with 30 GSS designed by Galileo system and 28 CORS in China region was computed by emulational Galileo orbits and GPS precise orbits.The result showed that: the precision of SISMA of GPS was slightly higher and better-proportioned than that of Galileo system;The precision of SISMA computed in China region was higher than that in global region;In China region,SISMA computed by 58 stations was commonly prior to 5cm,had a higher precision and was well-proportioned.SISMA computed by 28 China regional stations was commonly prior to that of 30 stations in Europe.