ANALYZING SEPARATION LOSS EVENTS IN TWO-PAIRED AIRCRAFT TRAILING CONDUCTING AIRBORNE TIME SPACING BASED CONTINUOUS DESCENT ARRIVAL

摘要

For realizing accurate time-spacing, Aircraft Surveillance Applications System (ASAS) is seen as a promising option in the future Air Traffic Management (ATM). One ASAS application of great interest is Interval Management (IM), which provides speed commands to maintain assigned time spacing between a leading aircraft at a chosen point, for example, at a runway threshold. The questions are how safety and capacity depend on the setting of spacing criteria in the IM operation, and how to identify potential safety risks that should be taken into account in the operation design. One of the most critical situations would be in the mixture of airborne surveillance; some aircraft use ADS-B surveillance and some follow the conventional way without ADS-B data-link in the same arrival flow. Aiming to learn how to understand non-nominal properties in the IM operation, this paper furthers a mathematical modeling and large-scale simulation study. Not only the loss of ADS-B surveillance information, but also the combinations with deterioration of positioning/speed data and pilot action delays are discussed via analysis on sequence of events based on a large scale Monte Carlo simulation.