ILS is the primary means for precision approach. New satellite navigation technologies are now in place to perform approaches. Airbus has integrated new technologies with an ILS look-alike interface that benefits from the ILS op experience
🧵 Satellite-based landing system (SLS)
SLS capability enhances the airline operations by enabling stable approaches especially at airports currently not having precision approach’s; at main runways as a backup to ILS (e.g. during maintenance), or at alternate airports in case of diversion.
SLS function design is fully integrated into the cockpit display architecture. The guidance symbology presented in the cockpit on the PFD looks just the same as an ILS approach
Other optional landing systems provide the same magenta lateral and vertical symbology such as GBAS Landing System (GLS) and FMS Landing System (FLS) for non-precision approaches. They form collectively a group called “xLS”.
Satellite Based Augmentation System (SBAS): is a wide area differential GNSS signal augmentation system. Many geostationary satellites (cover vast areas) are used to broadcast primary GNSS data which is provided with ranging, integrity & correction info by SBAS ground stations
For the #A320, Honeywell FMS has been certified for use with the SBAS function, while the Thales FMS option is planned to be ready for the introduction of the A321XLR.
For US airspace the SBAS augmentation is provided by “Wide-Area Augmentation System” (WAAS) & in India “GPS Aided GEO Augmented Navigation” (GAGAN). Other SBAS satellites are being deployed in Japan, Australia/New Zealand and China, and being developed for South Korea and Africa
@IndiGo6E became the first Indian Airline to successfully carry out a trail flight at Kishangarh Airport (VIKG) near Ajmer with an ATR72 aircraft using the GAGAN based SBAS.
Europe’s EasyJet was delivered the first #A320 NEO fitted with Satellite Based Landing System (SLS) registered as HB-AYP in June of 2022
twitter.com/avsourcenews/status/1533161666778734593?s=21&t=v-PC0eNdH3gX7ygHmmUQPg
Credits :
bit.ly/3aowaUb: Skybrary SBAS
bit.ly/3IlHj4v : Airbus SLS