© 2019 EUROCONTROL. All rights reserved. The networked nature of the air transportation
system leads to systemwide delays and cancellations as a result of disruptions at an airport.
A comprehensive analysis of system performance requires understanding the inherent
interdependencies between various airports, in order to characterize off-nominal disruptions
and to aid in recovery. In this work, we apply Graph Signal Processing (GSP) techniques to
the analysis of flight delay networks, yielding two novel contributions:(1) We use the notion …

… Large-scale disruptions are becoming more frequent Need methodologies to analyze and
characterize such large-scale disruptions … • Outlier identification in graph signals •
Airline-specific spectral and analyses • Phase portrait analysis of recovery • Expanding spectral
analysis to global air traffic networks • Learning sparser correlation networks from delay signals …