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Identifying Anomalies in past en-route Trajectories with Clustering and Anomaly Detection Methods

Abstract : This paper presents a framework to identify and characterise anomalies in past en-route Mode S trajectories. The technique builds upon two previous contributions introduced in 2018: it combines a trajectory-clustering method to obtain the main flows in an airspace with autoencoding artificial neural networks to perform anomaly detection in flown trajectories. The combination of these two well-known Machine Learning techniques (ML) provides a useful reading grid associating cluster analysis with quantified level of abnormality. The methodology is applied to a sector of the French Bordeaux Area Control Center (ACC) during its 385 hours of operation over seven months of ADS-B traffic. The results provide a good taxonomy of deconfliction measures and weather-related ATC actions. The application of this work is manyfold, ranging from safety studies estimating risks of midair collision, to complexity and workload assessments of traffic when a sector is operated, or to the constitution of a database of ATC actions ensuring aircraft separation. This database could be used to train further ML techniques aimed at improving the state of the art of deconfliction algorithms.
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Submitted on : Monday, November 4, 2019 - 3:41:31 PM
Last modification on : Wednesday, November 3, 2021 - 3:57:19 AM
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  • HAL Id : hal-02345597, version 1



Xavier Olive, Luis Basora. Identifying Anomalies in past en-route Trajectories with Clustering and Anomaly Detection Methods. ATM Seminar 2019, Jun 2019, VIENNE, Austria. ⟨hal-02345597⟩



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