ECHO is a two-year project, which will deliver a comprehensive demand analysis and the concept of operations for higher airspace, with the objective of allowing safe, efficient and scalable operations above the flight levels where conventional air traffic operates.
New airspace users and operations are increasingly emerging in this higher airspace. There is a broad diversity of vehicles, ranging from unmanned balloons, airships and solar planes capable of persistent flight, collectively known as high-altitude platform systems (HAPS) to supersonic and hypersonic aircraft, and trans-atmospheric and suborbital vehicles. Commercial and State space operations are also transiting through the higher airspace for launches and re-entries.