This work has been prepared by all CORUS partners: DLR, DFS, DSNA, ENAV, EUROCONTROL, HEMAV, NATS, Unifly and UPC. The list of authors would be too long to include them all, but we would like to acknowledge them now. This work has been partially funded by the SESAR Joint Undertaking, a body of the European Commission, under grant H2020 RIA-763551.

As part of the Single European Sky ATM Research (SESAR) a number of projects related to the drones flying at the very low level (VLL) have been funded. At its core, the CORUS project is developing the concept of operations (ConOps) of these drones1. At the same time, the last European ATM Masterplan has proposed the “Roadmap for the safe integration of drones into all classes of airspace”2. This document proposes the set of services for the unmanned air traffic management, named as Uspace, together with a calendar for their deployment (from U1 to U4). The CORUS project integrates these services as pillars of the ConOps, with the objective of supporting the new businesses and jobs, improving the safety of the drones, and dealing with their public acceptance.