ISO INTERNATIONAL STANDARD 27875 Second edition 2019-02 Space systems Re-entry risk management for unmanned spacecraft and launch vehicle orbital stages Systemes spatiaux - Gestion du risque de la rentrée pour les étapes orbitales des véhicules spatiaux non habites et des lanceurs spatiaux Reference number IS0 27875:2019(E) so @ IS0 2019 IS0 27875:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ ISO 2019 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 on the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address below or Iso's member body in the country of the requester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved IS0 27875:2019(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions ..1 4 Re-entry risk management .2 4.1 General .2 4.2 Re-entry safety programme.. .2 4.3 Re-entry safety oversight and management. .2 .2 4.4 Re-entry risk assessment and mitigation plan 4.4.1 Preparation of the plan. 2 4.4.2 Authorization of the plan. .3 4.5 Re-entry risk management concept. .3 5 Risk assessment for the case of natural re-entry .3 5.1 General .3 5.2 Identification of safety requirements. 4 5.2.1 Identification of requirements. .4 5.2.2 Risk assessment plan 4 5.3 Identification of standardized process and resources for analysis .4 5.4 Identification of system/mission dependent parameters. .5 5.5 Estimation of risk in the case of natural re-entry .5 .5 5.5.1 Estimation of the number of casualties 5.5.2 Estimation and assessment of casualty risk .6 5.6 Assessmentofenvironmentalrisk ..6 5.7 Risk decision and actions. .7 5.7.1 Acceptance of risk or suggestion for risk reduction ..7 5.7.2 Consideration with other risk, if required 1 6 Risk-reduction measures. .7 6.1 General .7 6.2 Design measures to reduce re-entry survivability 6.3 Controlled re-entry. .8 7 Planning, design and operation of controlled re-entry ..8 7.1 General .8 7.2 Identification of requirements .8 7.3 Planning of the controlled re-entry ..9 7.3.1 Landing location and area .9 7.3.2 Design features for controlled re-entry 7.4 Risk assessment for controlled re-entry .10 7.4.1 Risk assessment method. 10 7.4.2 Incaseofnon-conformance .10 7.5 Notification. .10 7.5.1 Normal plan .10 7.5.2 Contingency plan .10 7.6 Post re-entry activities. ..11 Annex A (informative) Contents of the re-entry risk assessment and mitigation plan ..12 Annex B (informative) The risk management process. ..15 Annex C (informative) Calculation of expected number of casualties. ..19 Bibliography .23 @ IS0 2019 - All rights reserved iii