GAGAN close to certification
India's GPS augmentation system should become fully operational by the end of the year.
The certification document for the GPS-Aided Geo-Augmented Navigation (GAGAN) overlay has been passed to the Indian Directorate General of Civil Aviation (DGCA) for approval, following completion of the Final Operational Phase, which included a 30-day stability test.
The system comprises an extensive ground infrastructure and 2 geostationary satellites, at 82° E and 55° E, each carrying a 'bent pipe' transponder. An additional in-orbit spare satellite will be located at 83° E.
GAGAN will provide aircraft with a Required Navigation Performance (RNP 0.1) service and CAT-1 approaches without needing ground facilities, claiming to reduce delays, achieve greater runway capability and reduce fuel burn by 5%. It will also be available for other modes of transport.
The overlay is compatible with the US WAAS, European EGNOS and Japanese MSAS.
The cost of GAGAN is reported as 7.74 billion rupees (~ £78, €92, $126 million).
Details from DNA India below.