〔技術資料〕ARAIM (Advanced Receiver Autonomous Integrity Monitoring)のインテグリティ理論と故障衛星排除アルゴリズム

抄録

Advanced Receiver Autonomous Integrity Monitoring (ARAIM) is a next-generation of a conventional RAIM and is expected to be used as air navigation with less than RNP 0.3NM horizontal guidance and vertical guidance, that could not be achieved by the conventional RAIM. ARAIM is the global service of GNSS navigation that it is based on using multiconstellation satellites and L1/L5 dual frequency signals. It also has a function of fault detection and exclusion (FDE) to eliminate the multiple satellite faults within a constellation on its own. Therefore, the aviation users can get more integrity and availability than conventional RAIM. In order to realize these, Integrity Support Message (ISM) is introduced to dynamically provide the priori risk of a satellite fault etc. In addition, in order to cope with multiple satellite failures, Multiple Hypothesis Solution Separation (MHSS) will be adopted. This paper explains the ARAIM concept, theory of integrity and FDE algorithm based on Milestone 3 Report issued by the ARAIM Technical Subgroup in EU-U.S. Cooperation on Satellite Navigation.