GAGAN is the ACRONYM for GPS Aided GEO Augmented Navigation. GAGAN is a joint venture of ISRO (Indian Space Research Organization) and AAI (Airports Authority of India). Let’s understand WORKING of GAGAN step by step.

1. GPS satellite data is collected by a network of precisely surveyed ground reference stations which are known as INRES(INdian REference Stations). These INRES are strategically positioned across the country so that entire Indian Airspace can be covered.Total 14 INRES.
2. Data collected by INRESs is sent to Bengaluru-based INMCC (INdian Master Control CENTRE)which in turn generates messages to CORRECT any signal errors.
3. These correction messages are then uplinkedthrough INLUS(INdian Land Uplink STATION) and broadcast through communication satellites (Geostationary) to the user (Aircraft).

GAGAN is the acronym for GPS Aided GEO Augmented Navigation. GAGAN is a joint venture of ISRO (Indian Space Research Organization) and AAI (Airports Authority of India). Let’s understand working of GAGAN step by step.