Space Based Augmentation System - Any system that uses a network of geostationary satellites and ground stations to enhance the performance of a Global Navigation Satellite System (GNSS) by providing signal corrections and additional satellites with known and constant positions.

(Space-Based Augmentation System) With the help of satellites, this system transmits corrective data to the GPS or to GLONASS. It covers larger regions than the GBAS, but is less accurate and can accordingly only be used for non-precision approaches. (– EGNOS)

pace- ased ugmentation ystem is a regional augmentation systems for GPS and/or GLONASS. An SBAS system is based on a networked ground segment and navigation payloads on-board of geostationary satellites whose main purpose is to provide higher position accuracies, better availability and continuity of service and integrity messages to the users of space based navigation systems. Currently existing SBASs are based on DO229 data exchange standard.