ISO INTERNATIONAL STANDARD 20785-4 First edition 2019-05 Dosimetry for exposures to cosmic radiation in civilian aircraft - Part 4: Validation of codes Dosimetrie pour les expositions au rayonnement cosmique a bord d'un avion civil - Partie4:Validationdescodes Reference number ISO 20785-4:2019(E) ISO @IS0 2019 IS020785-4:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2019 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 orIso's memberbody in the countryof therequester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone:+41227490111 Fax:+4122749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2019- All rights reserved IS0 20785-4:2019(E) Contents Page Foreword ..iv Introduction.. 1 Scope.. 2 Normativereferences 3 Terms and definitions 3.1 Quantities and units .1 3.2 Atmospheric radiation field 3.3 Softwareterms. .5 4 General considerations .5 5 Functionality .6 5.1 General ..6 5.2 Measured data. .6 5.3 ICRUreferencedata 5.4 Code validation using measurements or reference data 6 5.5 Considerations for the routine dose assessment .6 Bibliography .8 @ IS0 2019 -All rights reserved iii