BS EN 16603-50:2014 BSI Standards Publication Space engineering — Communications BS EN 16603-50:2014 BRITISH STANDARD National foreword This British Standard is the UK implementation of EN 16603-50:2014 The UK participation in its preparation was entrusted to Technical Committee ACE/68, Space systems and operations A list of organizations represented on this committee can be obtained on request to its secretary This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application © The British Standards Institution 2014 Published by BSI Standards Limited 2014 ISBN 978 580 84102 ICS 49.140 Compliance with a British Standard cannot confer immunity from legal obligations This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2014 Amendments issued since publication Date Text affected BS EN 16603-50:2014 EN 16603-50 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM September 2014 ICS 49.140 English version Space engineering - Communications Ingénierie spatiale - Communications Raumfahrttechnik - Kommunikation This European Standard was approved by CEN on March 2014 CEN and CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN and CENELEC member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CEN and CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions CEN and CENELEC members are the national standards bodies and national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels © 2014 CEN/CENELEC All rights of exploitation in any form and by any means reserved worldwide for CEN national Members and for CENELEC Members Ref No EN 16603-50:2014 E BS EN 16603-50:2014 EN 16603-50:2014 (E) Table of contents Foreword Introduction Scope Normative references Terms, definitions and abbreviated terms 3.1 Terms defined in other standards .9 3.2 Terms specific to the present standard .9 3.3 Abbreviated terms 11 Space communications engineering principles 13 4.1 Context 13 4.2 Overall space communication 14 4.3 Space communication domains 17 4.4 4.3.1 Overview 17 4.3.2 Space network 18 4.3.3 Space link 18 4.3.4 Ground network 19 Communications engineering process 19 4.4.1 Introduction .19 4.4.2 Communication engineering activities 19 4.4.3 Process milestones 21 4.5 Relationship with other standards 22 4.6 Communications architecture 22 4.7 Spacecraft control considerations 23 Requirements 25 5.1 Introduction .25 5.2 Space communication system engineering process 25 5.2.1 Requirements engineering 25 5.2.2 Analysis 26 5.2.3 Design and configuration 27 5.2.4 Implementation 28 5.2.5 Verification 29 5.2.6 Operations 29 BS EN 16603-50:2014 EN 16603-50:2014 (E) 5.3 5.4 5.5 5.6 5.7 Space communication system 30 5.3.1 Bandwidth allocation 30 5.3.2 Congestion 30 5.3.3 Cessation of emission .31 Telecommanding 31 5.4.1 Commandability at all attitudes and rates 31 5.4.2 Telecommand delivery service 31 5.4.3 Erroneous telecommand rejection 31 5.4.4 Essential command distribution 31 5.4.5 Command authentication 32 5.4.6 Command encryption 32 5.4.7 Commandingintheblind 32 5.4.8 Telecommand acknowledgement 32 Telemetry .32 5.5.1 Telemetry at all attitudes and rates 32 5.5.2 Essential telemetry acquisition 32 5.5.3 Telemetry source identification 33 5.5.4 Telemetryintheblind .33 5.5.5 Telemetry packet time stamping 33 5.5.6 Simultaneous support of differing source rates 33 Space link .34 5.6.1 Introduction .34 5.6.2 Directionality .34 5.6.3 Short contact periods 34 5.6.4 Interoperability 35 5.6.5 Orbits 35 5.6.6 Noise sources 35 5.6.7 Mission phases 35 5.6.8 Link setup times 35 5.6.9 Mixed isochronous and asynchronous traffic 35 5.6.10 Mixed housekeeping and payload data 35 5.6.11 Space link performance 36 5.6.12 Space link frequency 37 5.6.13 Space link protocol 38 5.6.14 Space link service .39 Space network 41 5.7.1 General .41 BS EN 16603-50:2014 5.7.2 5.8 EN 16603-50:2014 (E) Space network services 42 Ground network 43 5.8.1 Overview 43 5.8.2 Data labelling 43 5.8.3 Security .43 5.8.4 Error rates 43 5.8.5 Hot redundant operation of ground network nodes 43 5.8.6 Ground network availability 43 Annex A (normative) Communication system requirements document (CSRD) - DRD 44 Annex B (normative) Communication system baseline definition (CSBD) DRD 48 Annex C (normative) Communication system analysis document (CSAD) DRD 53 Annex D (normative) Communication system verification plan (CSVP) DRD 56 Annex E (normative) Communication system architectural design document (CSADD) - DRD 59 Annex F (normative) Communication system detailed design document (CSDDD) - DRD 62 Annex G (normative) Communication system profile document (CSPD) DRD 64 Annex H (normative) Communication system operations manual (CSOM) DRD 66 Annex I (informative) Documentation summary 69 Bibliography 72 Figures Figure 4-1: Example configuration of a space communication system 14 Figure 4-2: CCSDS and Internet space link protocols 17 Figure 4-3: Space communications reference architecture 22 Tables Table A- ECSS-E-ST-50 DRD list 70 BS EN 16603-50:2014 EN 16603-50:2014 (E) Foreword This document (EN 16603-50:2014) has been prepared by Technical Committee CEN/CLC/TC “Space”, the secretariat of which is held by DIN This standard (EN 16603-50:2014) originates from ECSS-E-ST-50C This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2015, and conflicting national standards shall be withdrawn at the latest by March 2015 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association This document has been developed to cover specifically space systems and has therefore precedence over any EN covering the same scope but with a wider domain of applicability (e.g : aerospace) According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom BS EN 16603-50:2014 EN 16603-50:2014 (E) Introduction This standard specifies requirements for the development of the end-to-end data communication system for spacecraft Implementation aspects are defined in both ECSS-E-ST-50 Level standards and CCSDS standards The complete set of standards to define a complete communication link is project dependent and cannot be specified here ECSS-E-HB-50 provides some guidance on this aspect, and gives some practical examples BS EN 16603-50:2014 EN 16603-50:2014 (E) Scope This Standard specifies the requirements for the development of the endtoend data communications system for spacecraft Specifically, this standard specifies: • The terminology to be used for space communication systems engineering • The activities to be performed as part of the space communication system engineering process, in accordance with the ECSS-E-ST-10 standard • Specific requirements on space communication systems in respect of functionality and performance The communications links covered by this Standard are the spacetoground and spacetospace links used during spacecraft operations, and the communications links to the spacecraft used during the assembly, integration and test, and operational phases Spacecraft endtoend communication systems comprise components in three distinct domains, namely the ground network, the space link, and the space network This Standard covers the components of the space link and space network in detail However, this Standard only covers those aspects of the ground network that are necessary for the provision of the endtoend communication services NOTE Other aspects of the ground network are covered in ECSS-E-ST-70 This Standard may be tailored for the specific characteristics and constraints of a space project in conformance with ECSS-S-ST-00 BS EN 16603-50:2014 EN 16603-50:2014 (E) Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this ECSS Standard For dated references, subsequent amendments to, or revisions of any of these publications, not apply However, parties to agreements based on this ECSS Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below For undated references the latest edition of the publication referred to applies EN reference Reference in text Title EN 16601-00-01 ECSS-S-ST-00-01 ECSS system — Glossary of terms BS EN 16603-50:2014 E.2 EN 16603-50:2014 (E) Expected response E.2.1 a Introduction The CSADD shall contain a description of the purpose, objective, content and the reason prompting its preparation a Applicable and reference documents The CSADD shall list the applicable and reference documents in support to the generation of the document a Scope and content Mission description and communication system overview The CSADD shall briefly describe: the main objectives and characteristics of the space mission, and the intended communication system baseline as defined in the CSBD Communication system architectural design a The CSADD shall contain a description of the architectural design of the communication system in a human readable format, and include the justification of all critical architectural design decisions b As a minimum, the architectural design of the communication system shall: list each major component of the communication system, describe the function and performance of each major component in terms of top level requirements, list and broadly describe all of the internal interfaces (i.e interfaces between components of the communication system), and list and broadly describe all of the external interfaces (i.e interfaces between external entities and components of the communication system) a Requirement applicability matrix This CSADD shall provide a requirement applicability matrix, including the following information: requirements - containing a list of all requirements in the CSRD plus any derived requirements contained in the CSBD; applicability - indicating the applicability of each requirement to each major communication system component Usually, this 60 BS EN 16603-50:2014 EN 16603-50:2014 (E) column can be subdivided into a series of columns, one for each major system component, and completed checkbox style; E.2.2 a notes – providing any special information associated with a given requirement in respect of its allocation to a communication system component Special remarks Although this DRD imposes no constraints on the tools used to elaborate the architectural design, the architectural design shall be viewable without the use of the design tool 61 BS EN 16603-50:2014 EN 16603-50:2014 (E) Annex F (normative) Communication system detailed design document (CSDDD) - DRD F.1 DRD identification F.1.1 Requirement identification and source document This DRD is called from ECSS-E-ST-50, requirements 5.2.3.3a, 5.2.3.3b , 5.2.4.3b and 5.2.4.3f F.1.2 Purpose and objective The communication system detailed design document (CSDDD) describes the detailed design of the communication system, further elaborating the architectural design described in the CSADD (see ECSS-E-ST-50 Annex E) The CSDDD described the detailed design of each of the communication system components identified in the CSADD The CSDDD is produced by the communication system supplier to describe the detailed design of the communication system consistent with the architecture described in the CSADD It describes the detailed design of each of the major communication system components identified in the CSADD The CSDDD is produced for the CDR, and its acceptance at the CDR by the communication system customer implies a commitment to proceed with the implementation of the system according to that detailed design As specified in ECSS-E-ST-50, the CSDDD is frozen after acceptance at the CDR The communication system detailed design document describes the detailed design of the communication system, and derives from the CSBD (see ECSS-EST-50 Annex B) and CSADD (see ECSS-E-ST-50 Annex E) Specific detailed tests for the components described in the communication system detailed design document are further described in the CSVP (see ECSS-E-ST-50 Annex D) Any specific analysis activities to justify the detailed design are contained in the CSAD (see ECSS-E-ST-50 Annex C) As specified in ECSS-E-ST-50, the implementation or procurement of all of the communication system components is based on the communication system detailed design document 62 BS EN 16603-50:2014 EN 16603-50:2014 (E) F.2 Expected response F.2.1 a Introduction The CSDDD shall contain a description of the purpose, objective, content and the reason prompting its preparation a Scope and content Applicable and reference documents The CSDDD shall list the applicable and reference documents in support to the generation of the document Mission description and communication system overview a The CSDDD shall describe the main objectives and characteristics of the space mission b The CSDDD shall describe the architectural design contained in the CSADD a Communication system detailed design The CSDDD shall contain the detailed design of the communication system, with all critical detailed design decision justifications, including: the requirements applicable to each of the major components of the communication system identified in the CSADD, the detailed design of communication system, a justification of all design decisions relating to the detailed design of each component, and a complete description of all of the interfaces to each component a major component of the ICDs of the major components The CSDDD shall include the ICDs for each of the major components of the communication system F.2.2 a each Special remarks This DRD imposes no constraints on the tools used to elaborate the detailed design, and some elements of the detailed design, that can only be viewed with the aid of the tools used in the elaboration of the design, may be accepted 63 BS EN 16603-50:2014 EN 16603-50:2014 (E) Annex G (normative) Communication system profile document (CSPD) - DRD G.1 DRD identification G.1.1 Requirement identification and source document This DRD is called from ECSS-E-ST-50, requirements 5.2.3.3a and 5.2.5.3a G.1.2 Purpose and objective The communication system profile document (CSPD) defines the frequencies, protocols and protocol options, address assignments, channel assignments, spacecraft identifier assignments, space link bandwidth allocations, and onboard bus bandwidth allocations used in the communication system, and constitutes a formal statement of compliance of the communication system to ECSS-E-ST-50 The CSPD is produced by the communication system supplier as a formal statement of the compliance of the communication system to the ECSS-E-ST-50 requirements The communication system profile document describes the frequencies, protocols and protocol options, address assignments, channel assignments, spacecraft identifier assignments, space link bandwidth allocations, and onboard bus bandwidth allocations used in the communication system As specified in ECSS-E-ST-50, the final version of the communication system profile document is available at FRR Earlier versions can be produced for other reviews The communication system profile document describes the frequencies, protocols and protocol options, address assignments, channel assignments, spacecraft identifier assignments, spacelink bandwidth allocations, and onboard bus bandwidth allocations used in the communication system This is a formal statement of compliance of the communication system to ECSS-E-ST-50 and can be used for the establishment of interoperability agreements involving the communication system 64 BS EN 16603-50:2014 EN 16603-50:2014 (E) G.2 Expected response G.2.1 a Introduction The CSPD shall contain a description of the purpose, objective, content and the reason prompting its preparation a Scope and content Applicable and reference documents The CSPD shall list the applicable and reference documents in support to the generation of the document Mission description and communication system overview a The CSPD shall describe the main objectives and characteristics of the space mission, and b The CSPD shall describe the communication system to which this profile document relates a Communication system profile The CSPD shall consist of all tables, matrices, compliance statements, and compliance proformas to fully describe the characteristics of the communication system NOTE G.2.2 This DRD imposes no constraints on the way in which this information is presented Generally, any standard protocols that are used can be defined by the compliance proforma associated with that protocol For other, mission specific characteristics such as the spacecraft identifier values, spacelink frequencies, channel allocations, and address assignments, it is good practice that an appropriate mission proforma is defined early in the programme and populated as the values become known Special remarks None 65 BS EN 16603-50:2014 EN 16603-50:2014 (E) Annex H (normative) Communication system operations manual (CSOM) - DRD H.1 DRD identification H.1.1 Requirement identification and source document This DRD is called from ECSS-E-ST-50, requirement 5.2.3.3d H.1.2 Purpose and objective The communication system operations manual (CSOM) formally describes all procedures for the operation of the communication system The operational procedures include normal and contingency operations Normal operations include procedures for spacecraft signal acquisition, loss of signal, and handover, as well as communication system management activities such as address initialization and router configuration and maintenance Contingency operations cover unidirectional space link (uplink only, downlink only), unexpected loss of signal, and discontinuous signal The CSOM is produced by the communication system supplier to describe the operations procedures for normal and contingency operation of the communication system As specified in ECSS-E-ST-50, the final version of the communication system operations manual is available for FRR Earlier versions can be prepared for other reviews The communication system operations manual constitutes the user manual for the communication system It is used in the development of the overall space mission operations procedures, and can be relevant to the definition of the onboard software 66 BS EN 16603-50:2014 EN 16603-50:2014 (E) H.2 Expected response H.2.1 a Introduction The CSOM shall contain a description of the purpose, objective, content and the reason prompting its preparation a Applicable and reference documents The CSOM shall list the applicable and reference documents in support to the generation of the document a Scope and content Mission description and communication system overview The CSOM shall briefly describe: the main objectives and characteristics of the space mission, and the communication system implementation Communication systems operations a The CSOM shall describe the procedures used to commission the communication system during the early phases of the mission; b The CSOM shall describe the communication system test procedures used to verify the correct operation of the communication system during the mission; c The CSOM shall describe all of the routine operations procedures that are used during the mission, i.e once the communication system is commissioned and operating normally; d The CSOM should include any procedure for the communication system reconfiguration that can be expected during the mission, such as the switchover to a redundant communication chain, or the update of onboard routing tables; e The CSOM shall describe the contingency operations procedures to be used during abnormal operating conditions, e.g when failures occur in the communication system a Decommissioning procedure This CSOM shall describe the procedures used to decommission the communication system at the end of the mission 67 BS EN 16603-50:2014 EN 16603-50:2014 (E) a Additional operating procedures The CSOM shall describe any operating procedures applicable to the communication system not described in items H.2.1 and NOTE For example, these can include procedures to extend the capability of the communication system during the mission, e.g by adding spacecraft to an existing constellation 68 BS EN 16603-50:2014 EN 16603-50:2014 (E) Annex I (informative) Documentation summary A-A- Table A- identifies the list of the document requirements definitions (DRDs) associated with this Standard 69 EN 16603-50:2014 (E) Table A- ECSS-E-ST-50 DRD list DRD Id DRD Title DRD summary content Applicable to (phase) ECSS-E-ST-50 Communication Annex A system requirements document (CSRD) Formally describes the requirements from the customer on the spacecraft communication system Covers ground network, space link, and space network requirements, design, development, and operation ECSS-E-ST-50 Communication Annex B system baseline definition (CSBD) Formal response to the CSRD that constitutes the technical Analysis baseline for the design and implementation of the spacecraft communication system Includes a compliance matrix with the CSRD and any derived requirements Documents any major assumptions and constraints and noncompliances ECSS-E-ST-50 Communication Contains a full technical analysis of the communication Annex C system analysis system leading to the selection of frequencies, protocols, document (CSAD) protocol options, redundancy strategy, and operational concept Requirement engineering Analysis ECSS-E-ST-50 Communication Describes the verification test plan for the spacecraft Analysis, Annex D system verification communication system Plan covers tests carried out during verification plan (CSVP) verification phase and tests that may be used during operations Delivered Remarks SRR PDR PDR PDR ECSS-E-ST-50 Communication Annex E system architectural design document (CSADD) Describes the architectural design of the spacecraft communication system and shows the relationships between the communication system and other mission systems Design and configuration PDR ECSS-E-ST-50 Communication Annex F system detailed design document (CSDDD) Describes the detailed design of the spacecraft communication system Design and configuration CDR 70 EN 16603-50:2014 (E) DRD Id DRD Title ECSS-E-ST-50 Communication Annex G system profile document (CSPD) ECSS-E-ST-50 Communication Annex H system operations manual (CSOM) DRD summary content Applicable to (phase) Design and Documents the communication system profile, including frequency assignments, protocol selection, protocol options, configuration address assignments, channel assignments, spacecraft identifier assignments, spacelink bandwidth allocations, and onboard bus bandwidth allocations for TM and TC Formally describes all procedures for the operation of the spacecraft communication system Covers normal and contingency operations Normal operations include procedures such as spacecraft signal acquisition, loss of signal, and handover, as well as communication system management activities such as address initialization and router configuration and maintenance Contingency operations cover unidirectional communications (uplink only, downlink only) and unexpected loss and discontinuous signal Analysis Delivered Remarks CDR a The CSPD constitutes the formal statement of compliance to ECSS-E-50 b Level ECSS standards applied to the communication system have their own profile documents PDR 71 BS EN 16603-50:2014 EN 16603-50:2014 (E) Bibliography EN reference Reference in text Title EN 16601-00 ECSS-S-ST-00 ECSS system – Description, implementation and general requirements EN 16603-10 ECSS-E-ST-10 Space engineering – System engineering general requirements ECSS-E-HB-10 Space engineering – System engineering guidelines EN 16603-10-02 ECSS-E-ST-10-02 Space engineering – Verification EN 16603-20 ECSS-E-ST-20 Space engineering – Electrical and electronic EN 16603-40 ECSS-E-ST-40 Space engineering – Software general requirements ECSS-E-HB-50 Space engineering – Communications guidelines EN 16603-50-01 ECSS-E-ST-50-01 Space engineering – Space data links – Telemetry synchronization and channel coding EN 16603-50-04 ECSS-E-ST-50-04 Space engineering – Space data links – Telecommand protocols, synchronization and channel coding EN 16603-50-05 ECSS-E-ST-50-05 Space engineering – Radio frequency and modulation EN 16603-70 ECSS-E-ST-70 Space engineering – Ground systems and operations EN 16601-10 ECSS-M-ST-10 Space project management – Project planning and implementation EN 16601-40 ECSS-M-ST-40 Space project management – Configuration and information management ISO 7498:1984 ISO Information processing systems – Open systems interconnection — Basic reference model ISO 12172:2003 Space data and information transfer systems – Telecommand - Data routing service ISO 12173:2003 Space data and information transfer systems – Telecommand – Command operation procedures ISO 12174:2003 Space data and information transfer systems – Telecommand – Data management service – Architectural specification 72 This page deliberately left blank NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards Institution 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