Orbit Ephemeris Monitor for GBAS Cat-I aircraft Precision Approach operations

TL;DRAbstract

Abstract: The Ground based Augmentation System (GBAS) is being developed to enable precision approach and landing operations using the Global Positioning System (GPS). Each GBAS installation provides services through a GBAS Ground Facility (GGF) which is located at the airport it serves. By monitoring the GPS signals, measurements, and navigation messages, the GGF is able to exclude unhealthy satellites and broadcast real-time range correction messages for healthy satellites to users via a VHF data link. Airborne users apply these corrections to remove errors that are common between the GGF and the aircraft. The GGF is also responsible for warning the aircraft of any potential integrity threats that cannot easily be resolved by excluding unhealthy satellites. One source of potential errors is the satellite broadcast ephemeris message, which users decode and use to compute GPS satellite positions. In GBAS, potential GPS ephemeris faults are categorized into two types, A and B, based upo

Chat with Paper

AI Agents for this Paper