Evaluation of real-time position accuracy and LNAV/VNAV service availability of GAGAN SBAS (Wide Area Differential GPS) over Indian region

Airports Authority of India (AAI) in collaboration with Indian Space Research Organization (ISRO) has planned to demonstrate Wide Area Differential GPS (WADGPS), over the Indian Flight Information Region for civil aviation application purpose. In GAGAN-TDS (GPS Aided Geo Augmented Navigation- Technology Demonstration System), with a configuration of eight Reference Stations, one Indian Master Control Station, one Indian Land Uplink station with one GEO stationary satellite, accuracy and availability of GAGAN was demonstrated. GAGAN-TDS is leading to a Fully Operational Phase (FOP) Indian SBAS (Space Based Augmentation System). GAGAN will operationally provide Accuracy, Integrity, Continuity, Availability and level of Service.