GAGAN system Current Affairs - 2019

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Communication satellite GSAT-15 successfully launched from French Guiana

Indigenously developed Communication satellite GSAT-15 of Indian Space Research Organisation was successfully launched from the spaceport of Kourou in French Guiana.

It was launched by Ariane-5 VA-227 rocket (launch vehicle) of Arianespace into a Geosynchronous Transfer Orbit (GTO) along with Arabsat-6B (BADR-7) satellite of Airbus Defence and Space.

About GSAT-15

  • GSAT-15 is a high power satellite being inducted into the INSAT/GSAT communication satellite system and weighs around 3,164 kg.
  • Carries a total of 24 communication transponders in Ku-band along with GPS Aided GEO Augmented Navigation (GAGAN) payload operating in L1 and L5 bands
  • Carries a Ku-band beacon which helps in accurately pointing ground antennas towards the satellite.
  • It is the 3rd satellite to carry GAGAN payload after GSAT-8 and GSAT-10 which already are providing navigation services from orbit.
  • GSAT-15 has in-orbit operational life of 12 years and will be positioned at 93.5 degree east longitude.


  • GSAT-15 would enable ISRO to provide continuity of Ku-band services to Indian users.
  • It would also provide other location based services to various services in the Indian region.
  • Navigation payload GAGAN in the GSAT-15 would provide orbital backup to ensure safety of life navigation services in civil aviation sector.

GSAT-15 is the 19th payload launched by Arianespace for ISRO. In 2016, it is going to launch other 2 communication satellites namely GSAT-17 and GSAT-18.

It should be noted the Arianespace is a multinational company from Europe that was founded in 1980 as the world’s first commercial space launch service provider.

Union Government launches GAGAN, aviation navigation system

Union Government has launched GPS-Aided Geo Augmented Navigation (GAGAN) system, for aviation navigation. It was launched by Union Civil Aviation Minister Ashok Gajapathi Raju in New Delhi.

Facts about GAGAN system

  • Jointly developed by Indian Space Research Organisation (ISRO) and Airports Authority of India (AAI).
  • It will provide augmentation service for GPS over the India, Bay of Bengal, South-east Asia and Middle East along with expansion up to Africa.
  • 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.
  • Benefits: It will make airline operations more efficient by increasing fuel savings, direct routes, ease of search and rescue operations, reduced workload of flight crew and Air Traffic Controllers and cost savings due to withdrawal of ground aids.

With this launch, India became the fourth nation in the world to have inter-operable Satellite Based Augmentation System (SBAS) after US, Europe and Japan. It should be noted that GAGAN is the first SBAS system in the world to serve the equatorial region.