Space data and information transfer systems -- Space link extension (SLE) -- Return-all-frames service

ISO 22669:2013 defines the space link extension (SLE) return-all-frames (RAF) service in conformance with the SLE reference model (ISO 15396:2007). The RAF service is an SLE transfer service that delivers to a mission user all telemetry frames from one space link physical channel. ISO 22669:2013 defines the RAF service in terms of the operations necessary to provide the service, the parameter data associated with each operation, the behaviors that result from the invocation of each operation, and the relationship between, and the valid sequence of, the operations and resulting behaviors. It does not specify individual implementations or products, the implementation of entities or interfaces within real systems, the methods or technologies required to acquire telemetry frames from signals received from a spacecraft, the methods or technologies required to provide a suitable environment for communications, or the management activities required to schedule, configure, and control the RAF service.

Systèmes de transfert des données et informations spatiales -- Extension de liaisons spatiales (SLE) -- Service de retour par tout réseau

General Information

Status
Replaced
Publication Date
28-May-2013
Withdrawal Date
28-May-2013
Current Stage
9599 - Withdrawal of International Standard
Completion Date
29-May-2013
Ref Project

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INTERNATIONAL ISO
STANDARD 22669
Third edition
2013-06-01
Space data and information transfer
systems — Space link extension (SLE) —
Return-all-frames service
Systèmes de transfert des données et informations spatiales —
Extension de liaisons spatiales (SLE) — Service de retour par tout
réseau
Reference number
ISO 22669:2013(E)
ISO 2013
---------------------- Page: 1 ----------------------
ISO 22669:2013(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2013

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any

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Published in Switzerland
ii © ISO 2013 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 22669:2013(E)
Foreword

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. 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

International 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 Standards

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 subject of patent

rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 22669 was prepared by the Consultative Committee for Space Data Systems (CCSDS) (as

CCSDS 911.1-B-3, January 2010) and was adopted (without modifications except those stated in Clause 2 of

this International Standard) by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee

SC 13, Space data and information transfer systems.

This third edition cancels and replaces the second edition (ISO 22669:2007), which has been technically

revised.
© ISO 2013 – All rights reserved iii
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INTERNATIONAL STANDARD ISO 22669:2013(E)
Space data and information transfer systems — Space link
extension (SLE) — Return-all-frames service
1 Scope

1.1 This International Standard defines the space link extension (SLE) return-all-frames (RAF) service in

conformance with the SLE reference model (ISO 15396:2007). The RAF service is an SLE transfer service

that delivers to a mission user all telemetry frames from one space link physical channel.

1.2 This International Standard defines the RAF service in terms of
a) the operations necessary to provide the service,
b) the parameter data associated with each operation,
c) the behaviors that result from the invocation of each operation, and

d) the relationship between, and the valid sequence of, the operations and resulting behaviors.

1.3 It does not specify
a) individual implementations or products,
b) the implementation of entities or interfaces within real systems,

c) the methods or technologies required to acquire telemetry frames from signals received from a

spacecraft,

d) the methods or technologies required to provide a suitable environment for communications, or

e) the management activities required to schedule, configure, and control the RAF service.

1.4 The scope and field of application are furthermore detailed in subclauses 1.1, 1.2 and 1.3 of the

enclosed CCSDS publication.
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 911.1-B-3, January 2010, Space link extension — Return all frames service specification.

For the purposes of international standardization, the modifications outlined below shall apply to the specific

clauses and paragraphs of publication CCSDS 911.1-B-3.
Pages i to vi
This part is information which is relevant to the CCSDS publication only.
© ISO 2013 – All rights reserved 1
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ISO 22669:2013(E)
Pages 1-13 to 1-14
Add the following information to the reference indicated:
[1] Document CCSDS 910.4-B-2, October 2005, is equivalent to ISO 15396:2007.
[2] Document CCSDS 131.0-B-1, September 2003, is equivalent to ISO 22641:2005. .
[3] Document CCSDS 132.0-B-1, September 2003, is equivalent to ISO 22645:2005.
[4] Document CCSDS 732.0-B-2, July 2006, is equivalent to ISO 22666:2007.
[5] Document CCSDS 301.0-B-3, January 2002, is equivalent to ISO 11104:2003.
[7] ISO/IEC 8824-1:2002 has been cancelled and replaced by ISO/IEC 8824-1:2008.
Page E-1
Add the following information to the reference indicated:
[E6] Document CCSDS 913.1-B-1, September 2008, is equivalent to ISO 18440:2013.
3 Revision of publication CCSDS 911.1-B-3

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 CCSDS 911.1-B-

3. To this end, NASA will act as a liaison body between CCSDS and ISO.
ISO 22641:2005 has been cancelled and replaced by ISO 22641:2012.
ISO 11104:2003 has been cancelled and replaced by ISO 11104:2011.
2 © ISO 2013 – All rights reserved
---------------------- Page: 5 ----------------------
ISO 22669:2013(E)
Recommendation for Space Data System Standards
SPACE LINK EXTENSION—
RETURN ALL FRAMES
SERVICE SPECIFICATION
RECOMMENDED STANDARD
CCSDS 911.1-B-3
BLUE BOOK
January 2010
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ISO 22669:2013(E)
(Blank page)
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ISO 22669:2013(E)
CCSDS RECOMMENDED STANDARD FOR SLE RETURN ALL FRAMES SERVICE
AUTHORITY
Issue: Recommended Standard, Issue 3
Date: January 2010
Location: Washington, 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 documents 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
Space Communications and Navigation Office, 7L70
Space Operations Mission Directorate
NASA Headquarters
Washington, DC 20546-0001, USA
CCSDS 911.1-B-3 Page i January 2010
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ISO 22669:2013(E)
CCSDS RECOMMENDED STANDARD FOR SLE RETURN ALL FRAMES SERVICE
STATEMENT OF INTENT

The 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. Inasmuch as participation in the CCSDS is completely voluntary,

the results of Committee actions are termed Recommended Standards and are not
considered binding on any Agency.

This Recommended Standard is issued by, and represents the consensus of, the CCSDS

members. Endorsement of this Recommendation is entirely voluntary. Endorsement,
however, indicates the following understandings:

o Whenever a member establishes a CCSDS-related standard, this standard will be in

accord with the relevant Recommended Standard. Establishing such a standard
does not preclude other provisions which a member may develop.
o Whenever a member establishes a CCSDS-related standard, that member will
provide other CCSDS members with the following information:
-- The standard itself.
-- The anticipated date of initial operational capability.
-- The anticipated duration of operational service.

o Specific service arrangements shall be made via memoranda of agreement. Neither

this Recommended Standard nor any ensuing standard is a substitute for a
memorandum of agreement.

No later than five years from its date of issuance, this Recommended Standard 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 retired or canceled.

In those instances when a new version of a Recommended Standard is issued, existing

CCSDS-related member standards and implementations are not negated or deemed to be non-

CCSDS compatible. It is the responsibility of each member to determine when such

standards or implementations are to be modified. Each member is, however, strongly

encouraged to direct planning for its new standards and implementations towards the later

version of the Recommended Standard.
CCSDS 911.1-B-3 Page ii January 2010
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ISO 22669:2013(E)
CCSDS RECOMMENDED STANDARD FOR SLE RETURN ALL FRAMES SERVICE
FOREWORD

This document is a Recommended Standard for use in developing ground systems for space

missions and has been prepared by the Consultative Committee for Space Data Systems

(CCSDS). The Space Link Extension Return All Frames Service described herein is intended

for missions that are cross-supported between Agencies of the CCSDS.

This Recommended Standard specifies a data service that extends certain of the space-to-

ground communications services previously defined by CCSDS (references [2], [3], and [4])

within the framework established by the CCSDS Space Link Extension Reference Model

(reference [1]). It allows implementing organizations within each Agency to proceed with

the development of compatible, derived Standards for the ground systems that are within

their cognizance. Derived Agency Standards may implement only a subset of the optional

features allowed by the Recommended Standard and may incorporate features not addressed

by the Recommended Standard.

Through the process of normal evolution, it is expected that expansion, deletion, or

modification of this document may occur. This Recommended Standard is therefore 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 status of this document should be addressed to the

CCSDS Secretariat at the address indicated on page i.
CCSDS 911.1-B-3 Page iii January 2010
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ISO 22669:2013(E)
CCSDS RECOMMENDED STANDARD FOR SLE RETURN ALL FRAMES SERVICE

At time of publication, the active Member and Observer Agencies of the CCSDS were:

Member Agencies
– Agenzia Spaziale Italiana (ASI)/Italy.
– British National Space Centre (BNSC)/United Kingdom.
– Canadian Space Agency (CSA)/Canada.
– Centre National d’Etudes Spatiales (CNES)/France.
– China National Space Administration (CNSA)/People’s Republic of China.
– Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR)/Germany.
– European Space Agency (ESA)/Europe.
– Russian Federal Space Agency (RFSA)/Russian Federation.
– Instituto Nacional de Pesquisas Espaciais (INPE)/Brazil.
– Japan Aerospace Exploration Agency (JAXA)/Japan.
– National Aeronautics and Space Administration (NASA)/USA.
Observer Agencies
– Austrian Space Agency (ASA)/Austria.
– Belgian Federal Science Policy Office (BFSPO)/Belgium.
– Central Research Institute of Machine Building (TsNIIMash)/Russian Federation.
– Centro Tecnico Aeroespacial (CTA)/Brazil.
– 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.
– 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 National Space Committee (HNSC)/Greece.
– Indian Space Research Organization (ISRO)/India.
– Institute of Space Research (IKI)/Russian Federation.
– KFKI Research Institute for Particle & Nuclear Physics (KFKI)/Hungary.
– Korea Aerospace Research Institute (KARI)/Korea.
– Ministry of Communications (MOC)/Israel.
– National Institute of Information and Communications Technology (NICT)/Japan.
– National Oceanic and Atmospheric Administration (NOAA)/USA.
– National Space Organization (NSPO)/Chinese Taipei.
– Naval Center for Space Technology (NCST)/USA.
– Scientific and Technological Research Council of Turkey (TUBITAK)/Turkey.
– Space and Upper Atmosphere Research Commission (SUPARCO)/Pakistan.
– Swedish Space Corporation (SSC)/Sweden.
CCSDS 911.1-B-3 Page iv January 2010
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ISO 22669:2013(E)
CCSDS RECOMMENDED STANDARD FOR SLE RETURN ALL FRAMES SERVICE
– United States Geological Survey (USGS)/USA.
CCSDS 911.1-B-3 Page v January 2010
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ISO 22669:2013(E)
CCSDS RECOMMENDED STANDARD FOR SLE RETURN ALL FRAMES SERVICE
DOCUMENT CONTROL
Document Title Date Status
CCSDS Space Link Extension— April 2002 Original issue, superseded
911.1-B-1 Return All Frames Service
Specification
CCSDS Space Link Extension— November Issue 2, superseded
911.1-B-2 Return All Frames Service 2004
Specification
CCSDS Space Link Extension—Return All January Current issue:
911.1-B-3 Frames Service Specification, 2010 – corrects/clarifies/
Recommended Standard, Issue 3 updates text and adds
the option of
picosecond resolution
to the earth-receive-
time parameter.
EC1 Editorial Change 1 August Corrects editorial errors in
2010 A2.4.

NOTE – Substantive changes from the previous issue are indicated by change bars in the

inside margin.
CCSDS 911.1-B-3 Page vi JAanuaugusryt 2010 2010
© ISO 2013 – All rights reserved
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ISO 22669:2013(E)
CCSDS RECOMMENDED STANDARD FOR SLE RETURN ALL FRAMES SERVICE
CONTENTS
Section Page

1 INTRODUCTION.......................................................................................................... 1-1

1.1 PURPOSE OF THIS RECOMMENDED STANDARD ........................................ 1-1

1.2 SCOPE .................................................................................................................... 1-1

1.3 APPLICABILITY ................................................................................................... 1-1

1.4 RATIONALE .......................................................................................................... 1-2

1.5 DOCUMENT STRUCTURE ................................................................................. 1-2

1.6 DEFINITIONS, NOMENCLATURE, AND CONVENTIONS ............................. 1-5

1.7 REFERENCES ..................................................................................................... 1-13

2 DESCRIPTION OF THE RETURN ALL FRAMES SERVICE .............................. 2-1

2.1 OVERVIEW ........................................................................................................... 2-1

2.2 SPACE LINK EXTENSION REFERENCE MODEL ........................................... 2-1

2.3 SERVICE MANAGEMENT .................................................................................. 2-3

2.4 ARCHITECTURE MODEL—FUNCTIONAL VIEW .......................................... 2-4

2.5 ARCHITECTURE MODEL—CROSS SUPPORT VIEW .................................... 2-7

2.6 FUNCTIONAL DESCRIPTION ............................................................................ 2-7

2.7 OPERATIONAL SCENARIO .............................................................................. 2-17

2.8 SECURITY ASPECTS OF THE SLE RAF TRANSFER SERVICE .................. 2-18

3 RAF SERVICE OPERATIONS ................................................................................... 3-1

3.1 GENERAL CONSIDERATIONS .......................................................................... 3-1

3.2 RAF-BIND ............................................................................................................ 3-14

3.3 RAF-UNBIND ...................................................................................................... 3-20

3.4 RAF-START ......................................................................................................... 3-24

3.5 RAF-STOP............................................................................................................ 3-29

3.6 RAF-TRANSFER-DATA .................................................................................... 3-31

3.7 RAF-SYNC-NOTIFY ........................................................................................... 3-36

3.8 RAF-SCHEDULE-STATUS-REPORT ............................................................... 3-39

3.9 RAF-STATUS-REPORT...................................................................................... 3-43

3.10 RAF-GET-PARAMETER .................................................................................... 3-46

3.11 RAF-PEER-ABORT ............................................................................................. 3-50

4 RAF PROTOCOL ......................................................................................................... 4-1

4.1 GENERIC PROTOCOL CHARACTERISTICS .................................................... 4-1

4.2 RAF SERVICE PROVIDER BEHAVIOR ............................................................. 4-4

CCSDS 911.1-B-3 Page vii January 2010
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ISO 22669:2013(E)
CCSDS RECOMMENDED STANDARD FOR SLE RETURN ALL FRAMES SERVICE
CONTENTS (continued)
Section Page

ANNEX A DATA TYPE DEFINITIONS (NORMATIVE) ........................................... A-1

ANNEX B CONFORMANCE MATRIX (NORMATIVE) .............................................B-1

ANNEX C INDEX TO DEFINITIONS (INFORMATIVE) .......................................... C-1

ANNEX D ACRONYMS (INFORMATIVE) .................................................................. D-1

ANNEX E INFORMATIVE REFERENCES (INFORMATIVE) ..................................E-1

Figure

1-1 SLE Services Documentation ....................................................................................... 1-4

2-1 Return Space Link Processing SLE-FG ........................................................................ 2-4

2-2 RCF Service Production and Provision ........................................................................ 2-6

2-3 Example of the Management and Provision of RCF Service ....................................... 2-7

2-4 Simplified RCF Service Provider State Transition Diagram ...................................... 2-10

2-5 Mapping of RCF Service Operations to SLE-PDUs ................................................... 2-12

2-6 Buffers and Delivery Modes ....................................................................................... 2-17

Table

2-1 RAF Operations ............................................................................................................ 2-9

3-1 Setting of RAF Service Configuration Parameters ....................................................... 3-6

3-2 RAF-BIND Parameters ............................................................................................... 3-15

3-3 RAF-UNBIND Parameters ......................................................................................... 3-21

3-4 RAF-START Parameters ............................................................................................ 3-25

3-5 RAF-STOP Parameters ............................................................................................... 3-29

3-6 RAF-TRANSFER-DATA Parameters ........................................................................ 3-31

3-7 RAF-SYNC-NOTIFY Parameters .............................................................................. 3-36

3-8 RAF-SCHEDULE-STATUS-REPORT Parameters ................................................... 3-40

3-9 RAF-STATUS-REPORT Parameters ......................................................................... 3-43

3-10 RAF-GET-PARAMETER Parameters ....................................................................... 3-46

3-11 RAF Parameters .......................................................................................................... 3-48

3-12 RAF-PEER-ABORT Parameters ................................................................................ 3-50

4-1 Provider Behavior ......................................................................................................... 4-6

4-2 Event Description References ..................................................................................... 4-12

4-3 Predicate Descriptions ................................................................................................ 4-12

4-4 Boolean Flags.............................................................................................................. 4-13

4-5 Compound Action Definitions .................................................................................... 4-13

B-1 Conformance Matrix for RAF Service (Operations) .................................................... B-1

B-2 Conformance Matrix for RAF Service (Other Requirements) ..................................... B-2

CCSDS 911.1-B-3 Page viii January 2010
© ISO 2013 – All rights reserved
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ISO 22669:2013(E)
CCSDS RECOMMENDED STANDARD FOR SLE RETURN ALL FRAMES SERVICE
1 INTRODUCTION
1.1 PURPOSE OF THIS RECOMMENDED STANDARD

The purpose of this Recommended Standard is to define the Space Link Extension (SLE)

Return All Frames (RAF) service in conformance with the SLE Reference Model (reference

[1]). The RAF service is an SLE transfer service that delivers to a mission user all telemetry

frames from one space link physical channel.
1.2 SCOPE

This Recommended Standard defines, in an abstract manner, the RAF service in terms of:

a) the operations necessary to provide the service;
b) the parameter data associated with each operation;
c) the behaviors that result from the invocation of each operation; and

d) the relationship between, and the valid sequence of, the operations and resulting behaviors.

It does not specify:
a) individual implementations or products;
b) the implementation of entities or interfaces within real systems;
c) the methods or technologies required to acquire telemetry frames from signals
received from a spacecraft;
d) the methods or technologies required to provide a suitable environment for
communications; or

e) the management activities required to schedule, configure, and control the RAF service.

1.3 APPLICABILITY
1.3.1 APPLICABILITY OF THIS RECOMMENDED STANDARD

This Recommended Standard provides a basis for the development of real systems that

implement the RAF service. Implementation of the RAF service in a real system additionally

requires the availability of a communications service to convey invocations and returns of

RAF service operations between RAF service users and providers. This Recommended

Standard requires that such a communications service must ensure that invocations and

returns of operations are transferred:
a) in sequence;
b) completely and with integrity;
CCSDS 911.1-B-3 Page 1-1 January 2010
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ISO 22669:2013(E)
CCSDS RECOMMENDED STANDARD FOR SLE RETURN ALL FRAMES SERVICE
c) without duplication;

d) with flow control that notifies the application layer in the event of congestion; and

e) with notification to the application layer in the event that communications between

the RAF service user and the RAF service provider are disrupted, possibly resulting in

a loss of data.

It is the specific intent of this Recommended Standard to define the RAF service in a manner

that is independent of any particular communications services, protocols, or technologies.

1.3.2 LIMITS OF APPLICABILITY
1.3.2.1 Relationship to Real Systems

This Recommended Standard specifies the RAF service that may be provided by an SLE

Complex for inter-Agency cross support. It is neither a specification of, nor a design for, real

systems that may be implemented for the control and monitoring of existing or future

missions.
1.3.2.2 RAF Service and Telemetry Channel Coding

Telemetry channel coding on the space link is specified by reference [2]. This specification

is more restrictive with respect to telemetry channel coding than is reference [2]. In

particular, the provision of RAF service requires that Reed-Solomon coding must be present

or absent on all frames of a physical channel. RAF service is not supported where there is a

concurrent mix, on one physical channel, of some frames with Reed-Solomon coding and

some frames without.
1.4 RATIONALE

The goal of this Recommended Standard is to create a standard for interoperability between

the tracking stations or ground data handling systems of various Agencies and the consumers

of spacecraft telemetry.
1.5 DOCUMENT STRUCTURE
1.5.1 ORGANIZATION
This document is organized as follows:
a) section 1 presents the purpose, scope, applicability and rationale of this
Recommended Standard and lists the definitions, conventions, and references used
throughout the Recommended Standard;
CCSDS 911.1-B-3 Page 1-2 January 2010
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ISO 22669:2013(E)
CCSDS RECOMMENDED STANDARD FOR SLE RETURN ALL FRAMES SERVICE

b) section 2 provides an overview of the RAF service including a functional description,

the service management context, and protocol considerations;
c) section 3 specifies the operations of the RAF service;

d) section 4 specifies the dynamic behavior of the RAF service in terms of the state

transitions of the RAF service provider;

e) annex A provides a formal specification of RAF service data types using Abstract

Syntax Notation One (ASN.1);
f) annex B provides a conformance matrix that defines what capabilities must be
provided for an implementation to be considered compliant with this Recommended
Standard;

g) annex C lists all terms used in this Recommended Standard and identifies where they

are defined;
h) annex D lists all acronyms used within this document;
i) annex E provides a list of informative references.
1.5.2 SLE SERVICES DOCUMENTATION TREE
This Recommended Standard is based on the cross support model defined in the SLE

Reference Model (reference [1]). It expands upon the concept of an SLE transfer service as

an interaction between an SLE Mission User Entity (MUE) and an SLE transfer service

provider for the purpose of providing the RAF transfer service.

This Recommended Standard is part of a suite of documents specifying the SLE services.

The SLE services constitute one of the three types of Cross Support Services:
a) Part 1: SLE Services;
b) Part 2: Ground Domain Services;
c) Part 3: Ground Communications Services.

The basic organization of the SLE services documentation is shown in figure 1-1. The

various documents are described in the following subsections.
CCSDS 911.1-B-3 Page 1-3 January 2010
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ISO 22669:2013(E)
CCSDS RECOMMENDED STANDARD FOR SLE RETURN ALL FRAMES SERVICE
Space Link Extension
Cross Support
Cross Support Concept SLE Executive
Reference Model
Part 1: SLE Services Summary
Part 1: SLE Services
SLE Transfer Services
SLE Transfer Services
Forward SLE Service
Return SLE Service
Specifications
Specifications
SLE Service
Management Suite
SLE API for Internet Protocol for
Transfer Services Transfer Services
Recommended Recommended Informational
Legend:
Record (Yellow)
Standard (Blue) Practice (Magenta) Report (Green)
Figure 1-1: SLE Services Documentation
a) Cross Support Concept—Part 1: Space Link Extension Services (r
...

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