1、 Reference number ISO 17214:2011(E) ISO 2011INTERNATIONAL STANDARD ISO 17214 First edition 2011-12-15Space data and information transfer systems Spacecraft onboard interface services Time access service Systmes de transfert des informations et donnes spatiales Services dinterfaces bord des vhicules
2、spatiaux Service daccs au temps ISO 17214:2011(E) COPYRIGHT PROTECTED DOCUMENT ISO 2011 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without perm
3、ission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2011 All rights rese
4、rvedISO 17214:2011(E) ISO 2011 All rights reserved iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees.
5、Each member body interested in a subject for which a technical committee has been 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 Internat
6、ional Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Stand
7、ards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subjec
8、t of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 17214 was prepared by the Consultative Committee for Space Data Systems (CCSDS) (as CCSDS 872.0-M-1, January 2011) and was adopted (without modifications except those stated in Clause 2 of this I
9、nternational Standard) by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 13, Space data and information transfer systems. INTERNATIONAL STANDARD ISO 17214:2011(E) ISO 2011 All rights reserved 1Space data and information transfer systems Spacecraft onboard interface servi
10、ces Time access service 1 Scope This International Standard defines services and service interfaces provided by the Spacecraft Onboard Interface Services (SOIS) time access service. It specifies only the service and not the methods of providing the service, although use of the SOIS subnetwork servic
11、es is assumed. This International Standard conforms to the principles set out in the SOIS Green Book (CCSDS 850.0-G-1; see Reference A6) and it is intended to be applied together with it. The scope and field of application are furthermore detailed in subclauses 1.1 and 1.2 of the enclosed CCSDS publ
12、ication. 2 Requirements Requirements are the technical recommendations made in the following publication (reproduced on the following pages), which is adopted as an International Standard: CCSDS 872.0-M-1, January 2011, Spacecraft onboard interface services Time access service. For the purposes of i
13、nternational standardization, the modifications outlined below shall apply to the specific clauses and paragraphs of publication CCSDS 872.0-M-1. Pages i to v This part is information which is relevant to the CCSDS publication only. Page A-1 Add the following information to the reference indicated:
14、A3 Document CCSDS 301.0-B-3, January 2002, is equivalent to ISO 11104:2003. 3 Revision of publication CCSDS 872.0-M-1 It has been agreed with the Consultative Committee for Space Data Systems that Subcommittee ISO/TC 20/SC 13 will be consulted in the event of any revision or amendment of publication
15、 CCSDS 872.0-M-1. To this end, NASA will act as a liaison body between CCSDS and ISO. ISO 17214:2011(E) 2 ISO 2011 All rights reserved(blank page) Recommendation for Space Data System Practices SPACECRAFT ONBOARD INTERFACE SERVICES TIME ACCESS SERVICE RECOMMENDED PRACTICE CCSDS 872.0-M-1 MAGENTA BOO
16、K January 2011 ISO 17214:2011(E) ISO 2011 All rights reserved 3ISO 17214:2011(E) (blank page) ISO 2011 All rights reserved 4CCSDS RECOMMENDED PRACTICE FOR SOIS TIME ACCESS SERVICE CCSDS 872.0-M-1 Page i January 2011 AUTHORITY Issue: Recommended Practice, Issue 1 Date: January 2011 Location: Washingt
17、on, DC, USA This document has been approved for publication by the Management Council of the Consultative Committee for Space Data Systems (CCSDS) and represents the consensus technical agreement of the participating CCSDS Member Agencies. The procedure for review and authorization of CCSDS document
18、s is detailed in the Procedures Manual for the Consultative Committee for Space Data Systems, and the record of Agency participation in the authorization of this document can be obtained from the CCSDS Secretariat at the address below. This document is published and maintained by: CCSDS Secretariat
19、Space Communications and Navigation Office, 7L70 Space Operations Mission Directorate NASA Headquarters Washington, DC 20546-0001, USA ISO 17214:2011(E) ISO 2011 All rights reserved 5CCSDS RECOMMENDED PRACTICE FOR SOIS TIME ACCESS SERVICE CCSDS 872.0-M-1 Page ii January 2011 STATEMENT OF INTENT The
20、Consultative Committee for Space Data Systems (CCSDS) is an organization officially established by the management of its members. The Committee meets periodically to address data systems problems that are common to all participants, and to formulate sound technical solutions to these problems. Inasm
21、uch as participation in the CCSDS is completely voluntary, the results of Committee actions are termed Recommendations and are not in themselves considered binding on any Agency. CCSDS Recommendations take two forms: Recommended Standards that are prescriptive and are the formal vehicles by which CC
22、SDS Agencies create the standards that specify how elements of their space mission support infrastructure shall operate and interoperate with others; and Recommended Practices that are more descriptive in nature and are intended to provide general guidance about how to approach a particular problem
23、associated with space mission support. This Recommended Practice is issued by, and represents the consensus of, the CCSDS members. Endorsement of this Recommended Practice is entirely voluntary and does not imply a commitment by any Agency or organization to implement its recommendations in a prescr
24、iptive sense. No later than five years from its date of issuance, this Recommended Practice will be reviewed by the CCSDS to determine whether it should: (1) remain in effect without change; (2) be changed to reflect the impact of new technologies, new requirements, or new directions; or (3) be reti
25、red or canceled. In those instances when a new version of a Recommended Practice is issued, existing CCSDS-related member Practices and implementations are not negated or deemed to be non- CCSDS compatible. It is the responsibility of each member to determine when such Practices or implementations a
26、re to be modified. Each member is, however, strongly encouraged to direct planning for its new Practices and implementations towards the later version of the Recommended Practice. ISO 17214:2011(E) ISO 2011 All rights reserved 6CCSDS RECOMMENDED PRACTICE FOR SOIS TIME ACCESS SERVICE CCSDS 872.0-M-1
27、Page iii January 2011 FOREWORD This document is a technical Recommended Practice for use in developing flight and ground systems for space missions and has been prepared by the Consultative Committee for Space Data Systems (CCSDS). The Time Access Service described herein is intended for missions th
28、at are cross-supported between Agencies of the CCSDS, in the framework of the Spacecraft Onboard Interface Services (SOIS) CCSDS area. This Recommended Practice specifies a set of related services to be used by space missions to obtain onboard time. The SOIS Time Access Service provides provides a c
29、ommon service interface and quality of service regardless of the particular type of data link or protocol being used for communication. Through the process of normal evolution, it is expected that expansion, deletion, or modification of this document may occur. This Recommended Practice is therefore
30、 subject to CCSDS document management and change control procedures, which are defined in the Procedures Manual for the Consultative Committee for Space Data Systems. Current versions of CCSDS documents are maintained at the CCSDS Web site: http:/www.ccsds.org/ Questions relating to the contents or
31、status of this document should be addressed to the CCSDS Secretariat at the address indicated on page i. ISO 17214:2011(E) ISO 2011 All rights reserved 7CCSDS RECOMMENDED PRACTICE FOR SOIS TIME ACCESS SERVICE CCSDS 872.0-M-1 Page iv January 2011 At time of publication, the active Member and Observer
32、 Agencies of the CCSDS were: Member Agencies Agenzia Spaziale Italiana (ASI)/Italy. Canadian Space Agency (CSA)/Canada. Centre National dEtudes Spatiales (CNES)/France. China National Space Administration (CNSA)/Peoples Republic of China. Deutsches Zentrum fr Luft- und Raumfahrt e.V. (DLR)/Germany.
33、European Space Agency (ESA)/Europe. Instituto Nacional de Pesquisas Espaciais (INPE)/Brazil. Japan Aerospace Exploration Agency (JAXA)/Japan. National Aeronautics and Space Administration (NASA)/USA. Federal Space Agency (FSA)/Russian Federation. UK Space Agency/United Kingdom. Observer Agencies Aus
34、trian Space Agency (ASA)/Austria. Belgian Federal Science Policy Office (BFSPO)/Belgium. Central Research Institute of Machine Building (TsNIIMash)/Russian Federation. China Satellite Launch and Tracking Control General, Beijing Institute of Tracking and Telecommunications Technology (CLTC/BITTT)/Ch
35、ina. Chinese Academy of Sciences (CAS)/China. Chinese Academy of Space Technology (CAST)/China. Commonwealth Scientific and Industrial Research Organization (CSIRO)/Australia. CSIR Satellite Applications Centre (CSIR)/Republic of South Africa. Danish National Space Center (DNSC)/Denmark. Departament
36、o de Cincia e Tecnologia Aeroespacial (DCTA)/Brazil. European Organization for the Exploitation of Meteorological Satellites (EUMETSAT)/Europe. European Telecommunications Satellite Organization (EUTELSAT)/Europe. Geo-Informatics and Space Technology Development Agency (GISTDA)/Thailand. Hellenic Na
37、tional Space Committee (HNSC)/Greece. Indian Space Research Organization (ISRO)/India. Institute of Space Research (IKI)/Russian Federation. KFKI Research Institute for Particle section 2, describing general concepts and assumptions, including security issues; section 3, containing the Time Access S
38、ervice specification; section 4, containing the Management Information Base (MIB) for this service; section 5, comprising a Service Conformance Statement Proforma. In addition, four informative annexes are provided: annex A, containing a list of informative references; annex B, describing how local
39、time registers may be implemented and how the master onboard time value is usually distributed in current spacecraft; annex C, describing aspects of the POSIX API time functions which might be useful to implementers of the Time Access Service; annex D, describing how an implementation of the service may be characterised. ISO 17214:2011(E) ISO 2011 All rights reserved 12
