Union Minister of Civil Aviation P Ashok Gajapathi Raju on 13 July 2015 formally launched the GAGAN system (GPS AIDED GEO AUGMENTED NAVIGATION) in New Delhi.
With this, India has become the fourth nation after the US, Europe and Japan to have inter-operable Satellite Based Augmentation System (SBAS). Also, GAGAN is the first SBAS system in the world to serve the equatorial region.
On the technical front, the final operational phase of the system commenced on 19 May 2015, when it started broadcasting APV1 Certified aviation signals.