The goals are to mature and demonstrate the technologies which are necessary to build and operate a reusable launch vehicle, but also to better assess the operational cost of such a vehicle. The first flight is planned for 2022.
Eventually, lessons learned with the development of CALLISTO will pave the way to develop the European reusable launcher Ariane Next.
^Dumont, E; Ecker, T; Chavagnac, C; Witte, L; Windelberg, J; Klevanski, J; Giagkozoglou, S (2018), "CALLISTO - Reusable VTVL launcher first stage demonstrator" (PDF), Space Propulsion Conference 2018, Sevilla, Spain.
^Dumont, E; Ishimoto, S; Tatiossian, P (June 2019), "CALLISTO: a Demonstrator for Reusable Launcher Key Technologies", 32nd ISTS, Fukui, Japan.
^Patureau de Mirand, Antoine (July 2019). Ariane Next, a vision for a reusable cost efficient European rocket(PDF). 8th European Conference for Aeronautics and Space Sciences. doi:10.13009/EUCASS2019-949. Retrieved 18 August 2021.