Trajectory-Based Operations in Mixed Datalink Equipage Conditions
a Trajectory Management Evolution in Amsterdam ACC
N. Prins (TU Delft - Aerospace Engineering)
J. Ellerbroek – Graduation committee member (TU Delft - Aerospace Engineering)
B. van Dillen – Mentor (TU Delft - Aerospace Engineering)
Ferdinand Dijkstra – Graduation committee member (KDC mainport Schiphol)
P. Proesmans – Graduation committee member (TU Delft - Aerospace Engineering)
M.F.M. Hoogreef – Graduation committee member (TU Delft - Aerospace Engineering)
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Abstract
Trajectory-Based Operations (TBO) are intended to improve Air Traffic Management (ATM) by enabling earlier planning, more consistent trajectory prediction, and reduced tactical conflict management. During the transition towards advanced Automatic Dependent Surveillance–Contract (ADSC) and Controller–Pilot Data Link Communications (CPDLC) services, aircraft will provide different levels of downlinked intent and Flight Management System (FMS)-integrated trajectory update capability. This paper evaluates how this mixed datalink equipage affects a TBO concept for Amsterdam Area Control Centre (ACC) airspace. A strategic trajectory management model is developed for mixed inbound and outbound traffic between FL110 and FL260, combining fixed Flight Path Angle (FPA) descents with probabilistic Conflict Detection & Resolution (CD&R). Equipage-dependent uncertainty is represented through descent angle, target descent speed, and wind, while traffic density and fleet composition are varied in a Monte Carlo experiment. The results show that increasing equipage capability reduces trajectory adjustments and residual losses of separation, with the clearest benefits in higher density scenarios. Flown track distance and modelled work also decrease as more advanced equipage becomes available, although work reductions are small and occur mainly outside the Amsterdam ACC conflict management volume. Expected Approach Time (EAT) adherence remains broadly comparable across equipage compositions.