GPS-aided GEO augmented navigation

GAGAN
GPS-aided GEO augmented navigation
Type	Regional satellite-based augmentation system
Developers	Indian Space Research Organisation (ISRO) ; Airports Authority of India (AAI)
Accuracy	1.5 m or 4 ft 11 in (horizontal),; 2.5 m or 8 ft 2 in (vertical)
Launched	2001
Orbital radius	26,600 km (approx)
Max operational life	15 years
Fully operational by	2013–14
Project cost	₹774 crore (US$93 million)
	v; t; e;

The GPS-aided GEO augmented navigation (GAGAN) is an implementation of a regional satellite-based augmentation system (SBAS) by the Government of India.^[2] It is a system to improve the accuracy of a GNSS receiver by providing reference signals.^[3] 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.^[4]

The project has established 15 Indian Reference Stations (INRES), 2 Indian Master Control Centre (INMCC) and 3 Indian Land Uplink Station (INLUS) and installation of all associated software and communication links.^[5] It will be able to help pilots to navigate in the Indian airspace by an accuracy of 3 m (9.8 ft) and will be helpful for landing aircraft in marginal weather and difficult approaches like Mangalore International and Kushok Bakula Rimpochee airports.^[6]

^ "Soon, safety in the sky as GPS-aided Gagan set to take off", The Times of India, archived from the original on 8 January 2014
^ Singh, Amit (12 January 2019). "Ensuring safety and reliabity through indigenous satellite navigation system GAGAN". Times of India Blog. Retrieved 7 May 2019.
^ "India Approves Gagan System". Magazine article. Asian Surveying and Mapping. 15 September 2008. Archived from the original on 19 May 2009. Retrieved 5 May 2009.
^ Singh, Arjun (28 August 2008). "GAGAN Update". mycoordinates.org. Archived from the original on 28 August 2008.
^ "GAGAN system ready for operations - The Hindu". The Hindu. 11 January 2014.
^ "GAGAN System". pib.gov.in. 10 August 2024. Retrieved 19 June 2024.

[toi-1] "Soon, safety in the sky as GPS-aided Gagan set to take off", The Times of India, archived from the original on 8 January 2014

[2] Singh, Amit (12 January 2019). "Ensuring safety and reliabity through indigenous satellite navigation system GAGAN". Times of India Blog. Retrieved 7 May 2019.

[ASM-3] "India Approves Gagan System". Magazine article. Asian Surveying and Mapping. 15 September 2008. Archived from the original on 19 May 2009. Retrieved 5 May 2009.

[:0-4] Singh, Arjun (28 August 2008). "GAGAN Update". mycoordinates.org. Archived from the original on 28 August 2008.

[5] "GAGAN system ready for operations - The Hindu". The Hindu. 11 January 2014.

[:1-6] "GAGAN System". pib.gov.in. 10 August 2024. Retrieved 19 June 2024.

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