GAGAN: Satellite-Based Navigation System Launched

Date: July 14, 2015

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 GAGAN, aviation navigation system launched

ISRO has launched the GPS-Aided Geo Augmented Navigation (GAGAN) system on 13 July 2015. GAGAN is a satellite-based air navigation system which will make airline operations more efficient and in turn it will reduce costs also. Also it will reduce workloads for flight crews.GAGAN will provide its services from Bay of Bengal, South East Asia and Middle East expanding up to Africa.

GAGAN system Jointly developed by Indian Space Research Organisation (ISRO) and Airports Authority of India (AAI).The system with the help of reference and uplink station will provide corrections to the GPS signal in order to improve air traffic management. It is 10 times more precise compared to GPS and radio navigation aids used for precision landing. Presently, GAGAN Payload is already operational through GSAT-8 and GSAT-10 satellites. The 3rd payload will be carried onboard GSAT-15 satellite to be launched October 2015.

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After the US, Japan and European Union (EU), India have developed such augmented navigational system. It took over 15 years to develop this system.

Key points-

GAGAN will correct distortion in GPS signals, providing very accurate information.
GAGAN will reduce the error margin to 3.5 meters which is more than 50 meters at present.
GAGAN will predict the ground obstacles and thereby suggest shorter routes. Shorter routes would mean a saving on fuel costs.
The system is now operational but to use it, receivers are needed to be installed on board.
Every movement of an aircraft will be mapped not just over the Indian airspace but also SAARC countries.