GBAS APPROACH SERVICE TYPE A PROVIDED VIA SBAS RELAY

This manuscript proposes to use the GAST-A provisions outlined in Annex 10 with corrections and integrity information generated by SBAS systems to enable APV approaches. This creates more accessibility to airports that are served by LPV final approach segments. These approach segements can then be used by aircraft with GLS only multi mode receivers. At high latitudes, where the SBAS satellite has a low elevation angle, continuity of service is enhanced by providing an additional means of transmissision of augmentation data.