Integrated common altitude reference system for U-space

Unmanned aerial systems (UAS) share very low-level (VLL) airspace with conventional aircraft. To maintain separation among all users of this airspace, the altitudes of all aircraft must be known unmistakably through a common datum. However, while manned aviation uses pressure altitude obtained from barometric readings, UAS may use other systems such as GNSS-based altitudes.

The ICARUS project developed a solution for a common altitude reference inside VLL airspace by defining new U-space services and validated the findings in real operational environments. The solution enables both traditional and new unmanned airspace users to continue to use their preferred altitude reference system while ensuring safety and interoperability.

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