Integrated Common Altitude Reference System for U-space
Contact us

This project has received funding from SESAR Joint Undertaking under European Union’s Horizon 2020 Research and Innovation Programme

ICARUS – H2020 – SESAR – 2019/2 – Ref. 894593


INtroductory video


ICARUS project proposes a GNSS based altimetry solution to the challenge of the Common Altitude Reference System for drones at very low level airspace, through the identification of the navigation requirements applicable to Unmanned Aircraft Systems (UASs) and the definition of a new U-space service for UAS / Manned aircrafts altitude translation.

In particular, ICARUS intends to:

  • Define technical requirements for high accuracy GNSS-based altitude measurement for drones, to enable a reliable and accurate common vertical datum (UAS-UAS).
  • Investigate the vertical accuracy and resolutions achievable by the actual Digital Terrain Model (DTM/DSM) services for ground obstacles clearance (UAS-Ground Obstacles). 
  • Design a tailored U-space service for height transformation: geodetic measurement to a barometric reference system and vice-versa for UAS and Manned aircrafts (UTM/ATM interface, G Airspace problem)
  • Foster the safest possible system for a common altitude reference system to address the needs of UASs, Manned flights ad new Urban Air Mobility Actors (i.e. Taxi drones), paving the way for the enhancement of the VLL capacity and UAS separations for future BVLOS applications.

Our role 


TopView leads the Validation Activities of the prototype service.

The concept of ICARUS will be tested through a validation campaign in a real operational environment involving at least two drones flying in the same airspace, exploiting ICARUS prototype service.

In particular the role of TopView encompasses the definition of the validation scenario, the execution of the trials including those performed on the Cockpit simulator for GA pilots, with the subsequent analysis of results. 




U-space is a set of new services and specific procedures designed to support safe, efficient and secure access to airspace for large numbers of drones

Information management is a key component of U-space, the European Commission’s vision to enable complex drone operations with a high degree of automation to take place in all types of operational environments, including urban areas.