ISO/TS TECHNICAL SPECIFICATION 21979 First edition 2018-09 Space environment (natural and artificial) Procedure for obtaining worst case and confidence level of fluence using the quasi-dynamic model of earth's radiation belts Environnement spatial (naturel et artificiel) - Mode opératoire pour obtenir le cas le plus défavorable et le niveau de confiance de la fluence en utilisant le modele quasi-dynamique des ceintures de radiation terrestres Reference number ISO/TS 21979:2018(E) @IS02018 t license from IHS Not for Resale, 09/03/2018 17:20:00 MDT IS0/TS 21979:2018(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2018 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: +41 22 749 01 11 Fax: +41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland @ IS0 2018 - All rights reserved or networking permited without license from IHS Not for Resale, 09/03/2018 17:20:00 MDT IS0/TS 21979:2018(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. 2 Normative references 3 Terms and definitions 4 Radiation belts model. .2 5 Principles of the method .3 5.1 Cumulative fluence. 3 5.2 Confidencelevel 3 5.3 Quasi-dynamic model of Earth's radiation belts 3 5.3.1 Overview. .3 5.3.2 Available models 3 5.4 Remarks.. .3 Annex A (informative) Annex B (informative) CRRESELE Model Annex C (informative) MDS-1 Radiation Belt Model ..8 Bibliography ..18 iii ed without license from IHS Not for Resale, 09/03/2018 17:20:00 MDT