Article 2

For the purpose of this Decision, the following definitions apply: ‘Space object’ means any man-made object in outer space; ‘Spacecraft’ means any space object serving a specific purpose, including active artificial satellites and launcher upper stages; ‘Space debris’ means any space object including spacecraft or fragments and elements thereof in Earth's orbit or re-entering Earth's atmosphere, that are non-functional or no longer serve any specific purpose, including parts of rockets or artificial satellites, or inactive artificial satellites; ‘SST sensor’ means a device or a combination of devices, such as ground-based or space-based radars and telescopes, that is able to measure physical parameters related to space objects, such as size, location and speed; ‘SST data’ means physical parameters of space objects acquired by SST sensors or orbital parameters of space objects derived from SST sensors' observations; ‘SST information’ means processed SST data which is readily meaningful to the recipient.

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Source: EUR-Lex (Cellar) · retrieved 2026-11-01 · Text as adopted (Official Journal); later amendments are not incorporated in this text.