HomeStandardsActive StandardsActive Engineering standards
Active Engineering standards

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-AS-11C – Adoption Notice of ISO 16290, Space systems – Definition of the Technology Readiness Levels (TRLs) and their criteria of assessment (1 October 2014)
  2. ECSS-E-AS-50-21C Rev.2 – Adoption Notice of CCSDS 131.0-B-5, TM Synchronization and Channel Coding (5 December 2024)
  3. ECSS-E-AS-50-22C Rev.1 – Adoption Notice of CCSDS 132.0-B-3, TM Space Data Link Protocol (13 January 2023)
  4. ECSS-E-AS-50-23C Rev.1 – Adoption Notice of CCSDS 732.0-B-4, AOS Space Data Link Protocol (13 January 2023)
  5. ECSS-E-AS-50-24C Rev.1 – Adoption Notice of CCSDS 231.0-B-4, TC Synchronization and Channel Coding (13 January 2023)
  6. ECSS-E-AS-50-25C Rev.1 – Adoption Notice of CCSDS 232.0-B-4, TC Space Data Link Protocol (13 January 2023)
  7. ECSS-E-AS-50-26C – Adoption Notice of CCSDS 232.1-B-2, Communications Operation Procedure-1 (1 March 2021)
  8. ECSS-E-ST-10-02C Rev.1 – Verification (1 February 2018)
  9. ECSS-E-ST-10-03C Rev.1 – Testing (31 May 2022)
  10. ECSS-E-ST-10-04C Rev.1 – Space environment (15 June 2020)
  11. ECSS-E-ST-10-06C – Technical requirements specification (6 March 2009)
  12. ECSS-E-ST-10-09C – Reference coordinate system (31 July 2008)
  13. ECSS-E-ST-10-11C – Human factors engineering (31 July 2008)
  14. ECSS-E-ST-10-12C – Methods for the calculation of radiation received and its effects, and a policy for design margins (15 November 2008) +Corr.1 (22Feb2017)
  15. ECSS-E-ST-10C Rev.1 – System engineering general requirements (15 February 2017)
  16. ECSS-E-ST-20-01C – Multipactor design and test (15 June 2020)
  17. ECSS-E-ST-20-06C Rev.1 – Spacecraft charging (15 May 2019)
  18. ECSS-E-ST-20-07C Rev.2 – Electromagnetic compatibility (3 January 2022)
  19. ECSS-E-ST-20-08C Rev.2 – Photovoltaic assemblies and components (20 April 2023)
  20. ECSS-E-ST-20-20C – Electrical design and interface requirements for power supply (15 April 2016)
  21. ECSS-E-ST-20-21C – Electrical design and interface requirements for actuators (15 May 2019)
  22. ECSS-E-ST-20-40C – ASIC, FPGA and IP Core engineering (11 October 2023)
  23. ECSS-E-ST-20C Rev.2 – Electrical and electronic (8 April 2022)
  24. ECSS-E-ST-31-02C Rev.1 – Two-phase heat transport equipment (15 March 2017)
  25. ECSS-E-ST-31-04C – Exchange of thermal analysis data (1 February 2018)
  26. ECSS-E-ST-31C – Thermal control (15 November 2008)
  27. ECSS-E-ST-32-01C Rev.2 – Fracture control (30 July 2021)
  28. ECSS-E-ST-32-02C Rev.1 – Structural design and verification of pressurized hardware (15 November 2008)
  29. ECSS-E-ST-32-03C – Structural finite element models (31 July 2008)
  30. ECSS-E-ST-32-08C Rev.1 – Space engineering – Materials (15 October 2014)
  31. ECSS-E-ST-32-10C Rev.2 Corr.1 – Structural factors of safety for spaceflight hardware (1 August 2019)
  32. ECSS-E-ST-32-11C – Modal survey assessment (31 July 2008)
  33. ECSS-E-ST-32C Rev.1 – Structural general requirements (15 November 2008)
  34. ECSS-E-ST-33-01C Rev.2 – Mechanisms (1 March 2019)
  35. ECSS-E-ST-33-11C Rev.1 – Explosive subsystems and devices (1 June 2017)
  36. ECSS-E-ST-34C – Environmental control and life support (ECLS) (31 July 2008)
  37. ECSS-E-ST-35-01C – Liquid and electric propulsion for spacecraft (15 November 2008)
  38. ECSS-E-ST-35-02C – Solid propulsion for spacecrafts and launchers (8 October 2010)
  39. ECSS-E-ST-35-03C – Liquid propulsion for launchers (13 May 2011)
  40. ECSS-E-ST-35-06C Rev.2 – Cleanliness requirements for spacecraft propulsion hardware (7 April 2020)
  41. ECSS-E-ST-35-10C – Compatibility testing for liquid propulsion systems (6 March 2009)
  42. ECSS-E-ST-35C Rev.1 – Propulsion general requirements (6 March 2009)
  43. ECSS-E-ST-40-07C – Simulation modelling platform (2 March 2020)
  44. ECSS-E-ST-40C – Software (6 March 2009)
  45. ECSS-E-ST-50-02C – Ranging and Doppler tracking (31 July 2008)
  46. ECSS-E-ST-50-05C Rev.2 – Radio frequency and modulation (4 October 2011)
  47. ECSS-E-ST-50-11C – SpaceFibre – Very high-speed serial link (15 May 2019)
  48. ECSS-E-ST-50-12C Rev.1 – SpaceWire – Links, nodes, routers and networks (15 May 2019)
  49. ECSS-E-ST-50-13C – Interface and communication protocol for MIL-STD-1553B data bus onboard spacecraft (15 November 2008)
  50. ECSS-E-ST-50-14C – Spacecraft discrete interfaces (31 July 2008)
  51. ECSS-E-ST-50-15C – CANbus extension protocol (1 May 2015)
  52. ECSS-E-ST-50-16C – Space engineering – Time-Triggered Ethernet (30 September 2021)
  53. ECSS-E-ST-50-51C – SpaceWire protocol identification (5 February 2010)
  54. ECSS-E-ST-50-52C – SpaceWire – Remote memory access protocol (5 February 2010)
  55. ECSS-E-ST-50-53C – SpaceWire – CCSDS packet transfer protocol (5 February 2010)
  56. ECSS-E-ST-50C Rev.2 – Communications (5 December 2024)
  57. ECSS-E-ST-60-10C – Control performance (15 November 2008)
  58. ECSS-E-ST-60-20C Rev.2 – Star sensor terminology and performance specification (15 May 2019)
  59. ECSS-E-ST-60-21C – Gyro terminology and performance specification (15 February 2017)
  60. ECSS-E-ST-60-30C: Satellite attitude and orbit control system (AOCS) requirements (30 August 2013)
  61. ECSS-E-ST-70-01C – Spacecraft on-board control procedures (16 April 2010)
  62. ECSS-E-ST-70-11C – Space segment operability (31 July 2008)
  63. ECSS-E-ST-70-31C – Ground systems and operations – Monitoring and control data definition (31 July 2008)
  64. ECSS-E-ST-70-32C – Test and operations procedure language (31 July 2008)
  65. ECSS-E-ST-70-41C – Telemetry and telecommand packet utilization (15 April 2016)
  66. ECSS-E-ST-70C – Ground systems and operations (31 July 2008)
  67. ECSS-E-ST-80C – Space engineering – Security in space systems lifecycles (1 July 2024)