GPS-aided GEO augmented navigation
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.
| GEO augmented navigation system | |
|---|---|
| Type | Regional satellite-based augmentation system |
| Developers | Indian Space Research Organisation, Airports Authority of India |
| 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$97 million) |
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 3 m (9.8 ft) This will be helpful for landing aircraft in marginal weather and difficult approaches like Mangalore International and Kushok Bakula Rimpochee airports.