International ISO Standard IS017520 Space environment (natural and Second edition artificial) Cosmic ray and solar 2024-03 energetic particle penetration inward the magnetosphere : Method of determination of the effective vertical cut-off rigidity Systemes spatiaux (naturel etartificiel)-Rayons cosmiques et pénétration de particule énergétique solaire dans la magnétosphere - Methode de détermination de la rigidité de coupure verticale effective Referencenumber Iso 17520:2024(en) @ ISO 2024 IS0 17520:2024(en) COPYRIGHT PROTECTED DOCUMENT IS02024 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 40i: Ch.de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email:copyright@iso.org Website: www.iso.org Published in Switzerland @ IS0 2024 - All rights reserved i