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Concept
GPS-aided GEO augmented navigation
Summary
The GPS-aided GEO augmented navigation (GAGAN) is an implementation of a regional satellite-based augmentation system (SBAS) by the Government of India. It is a system to improve the accuracy of a GNSS receiver by providing reference signals. The Airports Authority of India (AAI)'s efforts towards implementation of operational SBAS can be viewed as the first step towards introduction of modern communication, navigation and surveillance / air traffic management system over the Indian airspace.
The project has established fifteen Indian reference stations, three Indian navigation land uplink stations, three Indian mission control centres, and installation of all associated software and communication links. It will be able to help pilots to navigate in the Indian airspace by an accuracy of This will be helpful for landing aircraft in marginal weather and difficult approaches like Mangalore International and Kushok Bakula Rimpochee airports.
The project was created in three phases through 2008 by the Airports Authority of India with the help of the Indian Space Research Organisation's (ISRO) technology and space support. The goal is to provide navigation system for all phases of flight over the Indian airspace and in the adjoining area. It is applicable to safety-to-life operations, and meets the performance requirements of international civil aviation regulatory bodies.
The space component became available after the launch of the GAGAN payload on the GSAT-8 communication satellite, which was successfully launched. This payload was also part of the GSAT-4 satellite that was lost when the Geosynchronous Satellite Launch Vehicle (GSLV) failed during launch in April 2010. A final system acceptance test was conducted during June 2012 followed by system certification during July 2013.
All aircraft being registered in India after 1 July 2021 are mandated to be outfitted with GAGAN equipment.
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