What is ‘GAGAN Satellite Technology’?

India has achieved a major landmark after the Airports Authority of India (AAI) successfully conducted a trial by applying the latest indigenous satellite-based augmentation system (SBAS) technology named GAGAN (GPS Aided GEO Augmented Navigation).


  • IndiGo became the first airline in Asia that used the indigenously developed satellite-based navigation system while landing at the Kishangarh airport, Rajasthan.
  • India is the first country in the Asia Pacific region that has achieved this.

Development of GAGAN

GAGAN has been jointly developed by the Indian Space Research Organisation (ISRO) and the Airports Authority of India (AAI). By using uplink and reference stations, this system provides corrections to the global positioning system (GPS) signal so as to improve the management of air traffic.


It is a Satellite-Based Augmentation System that provides Satellite-based Navigation services with integrity and accuracy that is required for civil aviation applications. Through the usage of this system better Air Traffic Management can be provided over the Indian Airspace. This system is interoperable with the other international SBAS systems that are being used across the world and will be able to provide seamless navigation across the regional boundaries. The GAGAN Signal-In-Space (SIS) is available via the GSAT-10 and GSAT-8. Aircraft have to rely on radio navigation aids for the purpose of precision landing. However, the smaller airports have a shortage of modern navigation aids. Hence, the visibility requirements in such airports are much higher. Such as the visibility requirement for all regular passenger flights at Kishangarh airport is 5,000 metres, but using the GAGAN technology, an aircraft can operate with a visibility of about 800 m. Extremely accurate information Is provided by GAGAN regarding an aircraft’s location, covering various parameters like longitude, latitude, and height.



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