What is GAGAN?

GAGAN (GPS Aided Geo Augmented Navigation) is a Satellite Based Augmentation System (SBAS) put in place by ISRO and Airport Authority of India for the Indian Airspace. SBAS systems help improve the accuracy of GNSS solutions in a specific region. GAGAN consists of a number of fixed ground stations across the Indian sub-continent which act as reference points for GNSS solutions in the region.

GAGAN has primarily been deployed for the civil aviation applications but will benefit user segments such as intelligent transportation, maritime, highways, railways, surveying, geodesy, security agencies, telecom industry, personal users of position location applications etc. 

The system is inter-operable with other international SBAS systems like US-WAAS, European EGNOS, and Japanese MSAS etc. The coverage of GAGAN extends from Africa to Australia.