Honeywell last week announced it has entered into an agreement with Airservices Australia to develop and certify a ground-based augmentation system (GBAS) and a ground-based regional augmentation system (GRAS) designed to enhance precision of GPS-based aircraft navigation for all phases of flight. Looking a lot like the FAA's wide-area augmentation system (WAAS) and local-area augmentation system (LAAS), both GBAS and GRAS are ground-based systems which monitor the accuracy of navigation signals from GPS satellites and transmit a correction signal to compatible receivers in nearby aircraft, allowing Category 1 precision landing capability. When GBAS-corrected GPS navigation systems are integrated with inertial navigation or other avionics sensors generally available on most commercial airlines, a GBAS is expected to eventually provide Category 2 and 3 landing capability.
This is a companion discussion topic for the original entry at https://www.avweb.com/news/honeywell-to-augment-australian-gps-signals