The integration of large drones flying under Instrument Fllight Rules in controlled airspaces is a complex task, yet a desirable objective. However, to benefit from the ATC, the Remote Pilote needs to communicate properly with the ATCOs. And that is where latency messes everything up.
Unlike other ACASs (ACAS II, ACAS X), ACAS Xu can provide both vertical and horizontal resolutions. The challenge is: how to choose between vertical and horizontal maneuvers? The choice is done by a module called Nucleus. However, little information on what Nucleus might be was publicly available until last September.
Drones regulation is quickly evolving with a notable increase in complexity as more mission types appear, technology advances and public acceptability evolves. Complying with the regulation is complexe enough in a single country, and it gets even more complex for cross-border missions.