The list of FAA GPS procedures using Waas, known by ICAO as space-based augmentation system (SBAS) procedures, continues to grow steadily. These include ILS-equivalent localizer precision with vertical guidance (LPV) approaches, providing centerline and glideslope guidance down to 200 feet at more than 800 Part 139 runways in the NAS, plus another 2,600 at various heights above 200 feet at other NAS Part 139 and non-Part 139 runways. At most of the non-Part 139 runways, of course, there’s no ILS, and probably never will be. SBAS is filling that need.
GPS-aided geo-augmented navigation
India’s GPS-Aided Geo Augmented Navigation (Gagan) system, jointly developed by Airports Authority of India (AAI), the Indian Space Research Organization and Raytheon, has been awarded certification for in Required Navigation Performance (RNP) 0.1 operations. Achieved with the help of quasi-U.S. government non-profit MITRE Corporation, the certification makes it the world’s fourth SBAS system certified for operational use.
If ever there was a Comeback Kid in avionics, it would have to be the FAA’s wide area augmentation system (Waas). Heralded by the agency in 1994 as the future Swiss Army knife of navigation, Waas was going to bring greater accuracy and enhanced reliability to the sometimes unpredictable GPS and, in so doing, promised a new era where satellites would replace not only the nation’s NDBs and VORs, but also the more than 600 Category 1 ILS installations in the National Airspace System at the time. Development would cost more than $300 million, and take about four years.
Operators lacking approval for precision area-nav (PRnav) operations are finding access to European airports increasingly limited, and Universal Avionics is here at EBACE to emphasize that its satellite-based augmentation system (Sbas) flight management systems (FMS) ensure compliance with the PRnav requirements set out in JAA TGL10. Area nav allows shorter, more direct routes and more precise navigational accuracy in terminal and approach airspace.
An Airports Authority of India official, speaking on condition of anonymity, told AIN the schedule for that nation’s new GPS-augmented navigation system (Gagan) might be pushed back to the end of this year. The Gagan system is the only satellite-based augmentation system that has an enhanced algorithm specifically for the equatorial region.
The certification for India’s GPS-Aided GEO Augmented Navigation (Gagan) project is presently being led by the Director General of Civil Aviation (DGCA) and, according to an official statement, is “expected to be operational in the summer of 2013.” However, an Airports Authority of India (AAI) official, speaking on condition of anonymity, ha