Active Engineering standards

The following standards 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-E-20-01A Rev.1 – Mulitipaction design and test (1 March 2013)
  2. ECSS-E-AS-11C – Adoption Notice of ISO 16290, Space systems – Definition of the Technology Readiness Levels (TRLs) and their criteria of assessment (1 October 2014)
  3. ECSS-E-ST-10-02C – Verification (6 March 2009)
  4. ECSS-E-ST-10-02C Rev.1 DIR2: “Space engineering – Verification”
  5. ECSS-E-ST-10-03C – Testing (1 June 2012)
  6. ECSS-E-ST-10-04C – Space environment (31 July 2008)
  7. ECSS-E-ST-10-06C – Technical requirements specification (6 March 2009)
  8. ECSS-E-ST-10-09C – Reference coordinate system (31 July 2008)
  9. ECSS-E-ST-10-11C – Human factors engineering (31 July 2008)
  10. ECSS-E-ST-10-12C – Methods for the calculation of radiation received and its effects, and a policy for design margins (15 November 2008) + “Identified typographical error”
  11. ECSS-E-ST-10-24C – Interface management (1 June 2015)
  12. ECSS-E-ST-10C Rev.1 – System engineering general requirements (15 February 2017)
  13. ECSS-E-ST-20-06C – Spacecraft charging (31 July 2008)
  14. ECSS-E-ST-20-07C Rev.1 – Electromagnetic compatibility (7 February 2012)
  15. ECSS-E-ST-20-08C Rev.1 – Photovoltaic assemblies and components (18 July 2012)
  16. ECSS-E-ST-20-20C – Electrical design and interface requirements for power supply (15 April 2016)
  17. ECSS-E-ST-20C – Electrical and electronic (31 July 2008)
  18. ECSS-E-ST-31-02C Rev.1 – Two-phase heat transport equipment (15 March 2017)
  19. ECSS-E-ST-31C – Thermal control (15 November 2008)
  20. ECSS-E-ST-32-01C Rev.1 – Fracture control (6 March 2009)
  21. ECSS-E-ST-32-02C Rev.1 – Structural design and verification of pressurized hardware (15 November 2008)
  22. ECSS-E-ST-32-03C – Structural finite element models (31 July 2008)
  23. ECSS-E-ST-32-08C Rev.1 – Space engineering – Materials (15 October 2014)
  24. ECSS-E-ST-32-10C Rev.1 – Structural factors of safety for spaceflight hardware (6 March 2009)
  25. ECSS-E-ST-32-11C – Modal survey assessment (31 July 2008)
  26. ECSS-E-ST-32C Rev.1 – Structural general requirements (15 November 2008)
  27. ECSS-E-ST-33-01C Rev.1 – Mechanisms (15 February 2017)
  28. ECSS-E-ST-33-11C – Explosive systems and devices (31 July 2008)
  29. ECSS-E-ST-34C – Environmantal control and life support (ECLS) (31 July 2008)
  30. ECSS-E-ST-35-01C – Liquid and electric propulsion for spacecraft (15 November 2008)
  31. ECSS-E-ST-35-02C – Solid propulsion for spacecrafts and launchers (8 October 2010)
  32. ECSS-E-ST-35-03C – Liquid propulsion for launchers (13 May 2011)
  33. ECSS-E-ST-35-06C Rev.1 – Cleanliness requirements for spacecraft propulsion hardware (15 November 2008)
  34. ECSS-E-ST-35-10C – Compatibility testing for liquid propulsion systems (6 March 2009)
  35. ECSS-E-ST-35C Rev.1 – Propulsion general requirements (6 March 2009)
  36. ECSS-E-ST-40C – Software general requirements (6 March 2009)
  37. ECSS-E-ST-50-01C – Space data links – Telemetry synchronization and channel coding (31 July 2008)
  38. ECSS-E-ST-50-02C – Ranging and Doppler tracking (31 July 2008)
  39. ECSS-E-ST-50-03C – Space data links – Telemetry transfer frame protocol (31 July 2008)
  40. ECSS-E-ST-50-04C – Space data links – Telecommand protocols, synchronization and channel coding (31 July 2008)
  41. ECSS-E-ST-50-05C Rev.2 – Radio frequency and modulation (4 October 2011)
  42. ECSS-E-ST-50-12C – SpaceWire – Links, nodes, routers and networks (31 July 2008)
  43. ECSS-E-ST-50-13C – Interface and communication protocol for MIL-STD-1553B data bus onboard spacecraft (15 November 2008)
  44. ECSS-E-ST-50-14C – Spacecraft discrete interfaces (31 July 2008)
  45. ECSS-E-ST-50-15C – CANbus extension protocol (1 May 2015)
  46. ECSS-E-ST-50-51C – SpaceWire protocol identification (5 February 2010)
  47. ECSS-E-ST-50-52C – SpaceWire – Remote memory access protocol (5 February 2010)
  48. ECSS-E-ST-50-53C – SpaceWire – CCSDS packet transfer protocol (5 February 2010)
  49. ECSS-E-ST-50C – Communications (31 July 2008)
  50. ECSS-E-ST-60-10C – Control performance (15 November 2008)
  51. ECSS-E-ST-60-20C Rev.1 – Star sensor terminology and performance specification (15 November 2008)
  52. ECSS-E-ST-60-21C – Gyro terminology and performance specification (15 February 2017)
  53. ECSS-E-ST-60-30C: Satellite attitude and orbit control system (AOCS) requirements (30 August 2013)
  54. ECSS-E-ST-70-01C – Spacecraft on-board control procedures (16 April 2010)
  55. ECSS-E-ST-70-11C – Space segment operability (31 July 2008)
  56. ECSS-E-ST-70-31C – Ground systems and operations – Monitoring and control data definition (31 July 2008)
  57. ECSS-E-ST-70-32C – Test and operations procedure language (31 July 2008)
  58. ECSS-E-ST-70-41C – Telemetry and telecommand packet utilization (15 April 2016)
  59. ECSS-E-ST-70C – Ground systems and operations (31 July 2008)