1. (2023, April 05). ECHO Project. Available online: https://higherairspace.eu/echo-project/.
2. Federal Aviation Administration (2020). Commercial Space Integration into the National Airspace System (CSINAS) Concept of Operations.
3. Young, J., Kee, M., and Young, C. (2015). Effects of Future Space Vehicle Operations on a Single Day in the National Airspace System: A Fast-Time Computer Simulation, Technical Note.
4. Luchkova, T., Kaltenhaeuser, S., and Morlang, F. (2016, January 16–18). Air Traffic Impact Analysis Design for a Suborbital Point-to-Point Passenger Transport Concept. Proceedings of the 3rd Annual Space Traffic Management Conference “Emerging Dynamics”, Daytona Beach, FL, USA.
5. Kaltenhaeuser, S., Luchkova, T., Klay, N., and Ang, R. (2019, January 26–27). Assessment of the Impact of Air Launch Operations on Air Traffic in Europe. Proceedings of the 5th Annual Space Traffic Management Conference “Progress through Collaboration”, Austin, TX, USA.