Abstract
Integrity performance is a confidence level which reflects the correctness of navigation information. The positioning accuracy and availability would be improved when user combines the GPS navigation information with that of Galileo and COMPASS systems. For local users, it is important to make full use of the whole integrity information of the three constellations. Based on the analysis of critical characters of multi-constellation navigation satellite system, considering the critical parameters of RAIM algorithm, missed detection probability is given using the information of satellite failure probability, missed detection probability and integrity risk, horizontal protection level (HPL) and vertical protection level (VPL) are analyzed both in theory and mathematical simulation. Results show that the receiver autonomous integrity monitoring performance based on multi-constellation navigation satellite system is much better than that based on a single constellation system. Both the missed detection probability and protection levels are improved. The availability of RAIM algorithm is enhanced.
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