Many flights across the world remain grounded due to COVID-19, however, repatriation flights and cargo flights require the airspace to remain open. There have also been cases of interrupted air traffic control (ATC) services due to suspected COVID cases in air traffic control centres. Today’s operational ATC concept does not allow other sectors to immediately take-over operations, if area control centres (ACCs) are taken out of service. This calls for a modernisation of the ATM system, building on virtualised ATC centres for ACCs and tower, with built-in business continuity, beyond national or regional borders.
In Europe, Frequentis is part of the efforts led by the SESAR (Single European Sky ATM Research) Joint Undertaking to drive the technical and operational implementation of the Virtual Centre concept. By geographically decoupling air traffic management (ATM) services from location, Virtual Centres increase geographic agility, capacity and cost-efficiency, while enabling better contingency planning. This would allow air traffic control operations to be carried out at another location, removing the need for any suspension of ATC operations.
“Business continuity in ATC is essential for the economy, both now, in times of the crisis, and during the recovery.”, states Hannu Juurakko, Vice President ATM Civil and Chairman of the ATM Executive Team. “We must look more closely at the long-term challenges ahead of us and jointly implement solutions which enable a resilient, sustainable air transport system, robust enough to withstand potential future crises. Flexible use of controller workspaces and solutions that offer geographical agility, built on virtual data centres are concepts we can already provide today.”
The principles of the virtual centre concept are what make remote digital towers possible. The virtualisation of tower ATC services is already well advanced in the industry and the number of implementations from around the world are continuously growing. Using virtualisation, remote digital towers allow ATC services to be provided away from the airport in bespoke facilities, instead of airport towers. It’s the geographic agility which makes the digital tower interesting. Instead of being bound to one location, a remote tower control centre serves as the permanent back-up facility, both during times of low traffic and when the regular ATC tower is out of service. But what do we still need to allow full cross-border collaboration at these digital tower facilities?
Allowing cross-border collaboration
A more harmonised concept of operations (CONOPS) is essential to allow properly trained controllers to manage a different sector of airspace. There also needs to be a more networked approach to the way ATM systems are connected, enabling safe and secure data exchange, even across national borders. It also requires a joint effort by ANSPs and policy makers to ensure the proper legislation is in place to enable such an operational concept. Virtualisation of ATC systems ensures the resilience of ATC services, beyond the operational measures that protect the health and safety of controllers. Using virtualisation, air traffic controllers are no longer bound to a physical control room. They can work from any location, serving any airspace. Finally, the solutions of the future need to be based on resilient, cloud-based architectures, providing protection against cyber threats.