EN
Numerous European countries, whether pursuing Space activity or not, share serious concerns as to armaments in Space. Space defence might become an important issue in the international arena because counteracting the emerging hazards will probably entail not only development of operational technologies and capacities but also formation of political alliances or attempts at determining certain “rules of conduct” concerning Space operations on the international level. European Space Situational Awareness constitutes operational monitoring and understanding of the orbital environment and the behaviours of entities being its part. Surveillance and tracking sensors (e.g. radar, optical, laser ones) acquire data on objects (active and defunct satellites, debris, fragments, Space weather and NEOs), which are processed and incorporated into the database (catalogue). Thus obtained data are aggregated and create a Space image, serving, among others, for warning operators against possible collisions of objects. At present, in Europe SSA constitutes a key operational domain.