ISO INTERNATIONAL STANDARD 18438 First edition 2013-06-01 Space data and information transfer systems Spacecraft Onboard Interface Services Subnetwork Test Service Systemes de transfert des informations et données spatiales Servicesd'interfacesaborddesvehiculesspatiauxServiced'essais par sous-réseau Reference number ISO 18438:2013(E) @ISO 2013 IHSunder Not for Resale ISO 18438:2013(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2013 All rights reserved. Unless otherwise specified, 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. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ ISO 2013 - All rights reserved yIHSunder Not for Resale ISO 18438:2013(E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeen 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/lEC Directives, Part 1. In particular the different approval criteria needed for the different types o IsO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/lEC Directives, Part 2. www.iso.org/directives rights. isO shall not be held responsible for identifying any or all such patent rights. Details of any patent patent declarations received. www.iso.org/patents Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. ISO 18438 was prepared by the Consultative Committee for Space Data Systems (CCSDS) (as of this International Standard) by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 13, Space data and information transfersystems. ii