ISO INTERNATIONAL STANDARD 20893 First edition 2021-02 Space systems Detailed space debris mitigation requirements for launch vehicle orbital stages Systemes spatiaux-Exigences detaillees pour la limitationdes debris spatiaux relatifs aux étages orbitaux des lanceurs Referencenumber IS0 20893:2021(E) ISO @ ISO 2021 IS0 20893:2021(E) COPYRIGHTPROTECTEDDOCUMENT IS02021 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting below or Iso's memberbody in the country ofthe requester. ISO copyright office CP 40i : Ch.de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22.749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2021 - All rights reserved IS020893:2021(E) Contents Page Foreword ..iv Introduction ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions ..1 4 Avoiding the intentional release of space debris into Earth orbit during normal operations 1 5 Avoiding break-ups in Earth orbit .2 5.1 Accidental break-up caused by an on-board source of energy 2 5.1.1 2 General 5.1.2 Residualpropellantsinpropulsionsystems 2 5.1.3 Pressurized gasses in pressure vessels 2 5.1.4 .3 Batteries. 5.1.5 Rangesafetysystems 3 5.1.6 Probability of accidental break-up due to internal causes .3 5.2 .3 Accidental break-upcausedbya collision 6 Disposal of a launch vehicle orbital stage after the end ofmission so as to minimize interferencewiththeprotectedregions .3 6.1 Launchserviceproviderspacecraftmissiondesignercoordination .3 6.2 Selectionofdisposal option .4 6.2.1 Disposal tominimizeinterferencewiththegeostationaryEarthorbit (GEO) protected region .4 6.2.2 Disposal to minimize interference with the low Earth orbit (LEO) protectedregion .4 .5 6.3 Probability of successful disposal 6.4 Contingency planning .5 7 Re-entry .5 8 Planning and documentation .6 8.1 General ..6 8.2 Break-up prevention plan 6 .6 8.3 Endofmissiondisposalplan 8.4 Re-entry plan 7 8.5 Documentation 7 Bibliography .8 IS02021-Allrightsreserved ili IS0 20893:2021(E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (Iso member bodies). The work of preparing International Standards is normally carried out through Iso technical committees.Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with Iso, also take part in the work. ISo collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the Iso/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types ofIsO documents should be noted.This document was drafted in accordance with the editorialrulesoftheISo/IECDirectives, Part2 (seewww.iso.org/directives) Attention is drawntothepossibilitythat someof theelements ofthisdocumentmaybethe subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. Details of anypatentrights identified during thedevelopmentof thedocument will be in the Introduction and/or on the Iso list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constituteanendorsement. For an explanation of the voluntary nature of standards, the meaning of Iso specific terms and expressions related to conformity assessment, as well as information aboutIso's adherenceto the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/ iso/fore