Indian Space Research Organisation (ISRO) and Airports Authority of India (AAI) are at work to provide a modern navigation system over the Indian airspace.
The system, christened GAGAN or GPS and Geo Augmented Navigation, will be a Satellite Based Augmentation System (SBAS).
GAGAN will be operational by end 2007. For Delhi Airport it would mean less delays during the winter months when fog throws air traffic out of gear. GAGAN will operate like Category IIIA Instrument Landing System, helping flights land in near zero visibility conditions. Its accuracy will be within 1 metre. It will provide both lateral and vertical guidance.
much needed and not too far away.