ECSS General and System documents

The following documents can be downloaded in PDF or MS Word format.

The European Space Agency hereby disclaims any liability for use of these electronic documents and assumes no responsibility for any error or omission therein. See the License agreement – Disclaimer for more information.


  1. ECSS-S-ST-00-01C Rev.1 – Glossary of terms (11 October 2023)
  2. ECSS-S-ST-00-02C Draft 1 “Tailoring” (15 June 2020)
  3. ECSS-S-ST-00C Rev.1 “Description, implementation and general requirements” (15 June 2020)