The GLASS project aims to achieve a satellitebased augmentation system (SBAS) that extends GLS approaches. This cost-effective system is to enable satellite-based approaches with vertical guidance and automated landings in freely definable locations within the SBAS service area. The GLASS (GLs Approaches using SbaS) system is intended to bring together the advantages of both space- and groundbased augmentation systems (SBAS and GBAS). It combines an SBAS-capable GNSS receiver with a database and a data link that is compatible with the GNSS Landing System (GLS). The correction and integrity data received from the SBAS satellite are automatically translated into GLS-compatible structures and sent to the multi-mode receiver along with data blocks for the final approach segment (FAS).