AT-One is the European ATM research alliance. It combines the strength of DLR’s Institute of Flight Guidance and NLR’s Division Aerospace Operations. Both deliver innovative and independent Air Traffic Management research and implementation support with a focus on integrated simulation, verification and validation.

AT-One has more than 260 employees that provide customer-oriented ATM solutions based on their unique knowledge and skills, and is supported by a complete suite of research facilities. The alliance operates from Amsterdam, Braunschweig and Brussels. AT-One participates as a member in SESAR 2020.