SBAS systems are proliferating worldwide: WAAS in US, MSAS in Japan, GAGAN in India and EGNOS in Europe have been declared operational and available for civil aviation. Other SBAS systems are in development or validation phases, such as the Russian SDCM, while others are under preliminary study phases as it is the case of SACCSA program in Latin-America (ICAO Regional Project RLA/03/902) or the Korean SBAS, which is presumably expected to start its first operations by 2020 supporting aviation, land and maritime users. The development and deployment of an SBAS system is a technological challenge. Consequently, it is usual that SBAS development plans envisage the deployment of SBAS pre-operational and non-certified systems on their preliminary phases prior to the first stages of the development of the operational system. Pre-operational systems offer numerous advantages, in particular provide the system developers and designers with powerful platforms to early validate new concept architectures, first design solutions and performance assumptions. This clearly impacts the mitigation of design risks and helps optimizing the design to satisfy system requirements. magicSBAS is a state-of-the-art real time pre-operational SBAS system developed by GMV to offer nonsafety critical SBAS augmentation to any interested region or organization. The algorithms implemented in magicSBAS have been fully developed by GMV and are the result of more than 20 years of experience in the development of EGNOS and other SBAS programs. The magicSBAS algorithms, originally designed to mimic EGNOS performances over the ECAC service area, have been further optimized and tuned to provide the best performances in other regions of the world such as Caribbean, Central and South America, South Africa, Australia and New Zealand and the Republic of Korea. Considering the preparatory activities for the Korean SBAS Programme which are currently being performed, this paper will be focused on the different SBAS experimentations based on the use of the magicSBAS pre-operational platform. By means of using GNSS input data from 5 stations and by configuring the pre-operational magicSBAS system within the South Korean service area, this paper will show the performances obtained when using the latest developments into the magicSBAS platform, including the capability to run real GPS data. MSAS real data has also been analyzed using GMV's magicGEMINI and ECLAYR performance analysis tools and compared against magicSBAS over the same period.

Keywords: SBAS, MSAS, magicSBAS, performances, ECLAYR, magicGEMINI, Korea, Japan