Low latitude ionospheric effects on SBAS systems

Satellite Based Augmentation Systems (SBAS) provides augmentation to GNSS users in three main areas (1) broadcasting accurate corrections to the broadcast GNSS satellite ephemeris, (2) providing a real-time empirical model of the ionospheric delays in the region covered by the system and (3) providing integrity information in the form of reliable estimates of the confidence of the ephemeris corrections and ionospheric delays.