Space systems — Safety requirements — Part 3: Flight safety systems

This document sets out the minimum requirements for flight safety systems (FSSs), including flight termination systems (FTSs, externally controlled systems or on-board automatic systems), tracking systems, and telemetry data transmitting systems (TDTSs) for commercial or non-commercial launch activities of orbital or suborbital, unmanned space vehicles. The intent is to minimize the risk of injury or damage to persons, property or the environment resulting from the launching of space vehicles. This document can be applied by any country, by any international organization, whether intergovernmental or not, and by any agency or operator undertaking the launching of space vehicles. This document is intended to be applied by any person, organization, entity, operator or launch authority participating in commercial or non-commercial launch activities of orbital, or suborbital, unmanned space vehicles unless more restrictive requirements are imposed by the launch site country.

Systèmes spatiaux — Exigences de sécurité — Partie 3: Systèmes de sauvegarde en vol

General Information

Status
Published
Publication Date
03-Aug-2021
Current Stage
6060 - International Standard published
Start Date
04-Aug-2021
Completion Date
04-Aug-2021
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INTERNATIONAL ISO
STANDARD 14620-3
Second edition
2021-08
Space systems — Safety
requirements —
Part 3:
Flight safety systems
Systèmes spatiaux — Exigences de sécurité —
Partie 3: Systèmes de sauvegarde en vol
Reference number
ISO 14620-3:2021(E)
ISO 2021
---------------------- Page: 1 ----------------------
ISO 14620-3:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

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 or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 14620-3:2021(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Abbreviated terms .............................................................................................................................................................................................. 2

5 General requirements ..................................................................................................................................................................................... 2

6 Flight termination system requirements .................................................................................................................................... 3

6.1 General ........................................................................................................................................................................................................... 3

6.2 Flight termination system safe and arm devices ....................................................................................................... 4

6.3 Flight termination system ordnance .................................................................................................................................... 5

6.4 Ground support equipment ......................................................................................................................................................... 5

7 Range tracking system requirements ............................................................................................................................................. 6

7.1 Description ................................................................................................................................................................................................. 6

7.2 Requirements ........................................................................................................................................................................................... 6

8 Telemetry data transmitting system requirements ......................................................................................................... 7

8.1 Description ................................................................................................................................................................................................. 7

8.2 Requirements ........................................................................................................................................................................................... 7

© ISO 2021 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 14620-3:2021(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.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

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. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see 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.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles,

Subcommittee SC 14, Space systems and operations.

This second edition cancels and replaces the first edition (ISO 14620-3:2005), which has been

technically revised. The main changes compared with the previous edition are as follows:

— the text has been updated to be consistent with ISO 14620-1 and ISO 14620-2.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 14620-3:2021(E)
Introduction

Space launch activities can present hazards to people and damage to property and the environment.

International space treaties adopted by the United Nations impose legal liabilities on countries involved

in launching space vehicles to provide compensation for certain injuries and damages incurred as the

result of such launches.

This document affects the safety of exposed people, property and environment, as well as countries

and organizations conducting commercial or civil launch activities.
© ISO 2021 – All rights reserved v
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 14620-3:2021(E)
Space systems — Safety requirements —
Part 3:
Flight safety systems
1 Scope

This document sets out the minimum requirements for flight safety systems (FSSs), including flight

termination systems (FTSs, externally controlled systems or on-board automatic systems), tracking

systems, and telemetry data transmitting systems (TDTSs) for commercial or non-commercial launch

activities of orbital or suborbital, unmanned space vehicles. The intent is to minimize the risk of injury

or damage to persons, property or the environment resulting from the launching of space vehicles.

This document can be applied by any country, by any international organization, whether

intergovernmental or not, and by any agency or operator undertaking the launching of space vehicles.

This document is intended to be applied by any person, organization, entity, operator or launch

authority participating in commercial or non-commercial launch activities of orbital, or suborbital,

unmanned space vehicles unless more restrictive requirements are imposed by the launch site country.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 10795, Space systems — Programme management and quality — Vocabulary
ISO 14620-1, Space systems — Safety requirements — Part 1: System safety

ISO 14620-2, Space systems — Safety requirements — Part 2: Launch site operations

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 10795, ISO 14620-2 and the

following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
flight safety system

combination of flight-, ground- or space-based hardware and software designed, installed and/or

operated specifically for providing flight safety

Note 1 to entry: This combination of equipment, facilities, procedures and personnel required to monitor

operations provides protection to personnel and property both foreign and domestic from any damage that can

be caused by a non-nominal flight.

Note 2 to entry: The flight safety system may include flight termination systems (3.2), telemetry data transmitting

systems (3.6) and range tracking systems (3.4).
© ISO 2021 – All rights reserved 1
---------------------- Page: 6 ----------------------
ISO 14620-3:2021(E)
3.2
flight termination system

explosive or other disabling or thrust-terminating equipment installed in a launch vehicle, plus any

associated ground equipment, for terminating the flight of a malfunctioning vehicle or stage

3.3
launch

initial action to place, or attempt to place, a launch vehicle and payload, if any, in a suborbital trajectory,

in Earth orbit in outer space, or otherwise in outer space
3.4
range tracking system

combination of flight-, ground- or space-based hardware and software designed, installed and/or

operated specifically for tracking a launch vehicle
3.5
safety envelope

area designated for launch (3.3) and preorbital flight that is cleared of uninvolved persons or where the

risk of injury, fatality or property damage to the public is below a designated threshold probability (3.7)

3.6
telemetry data transmitting system

combination of flight- or space-based hardware and software, designed, installed or operated for down-

linking vehicle and flight system performance and health data to flight safety operators

3.7
threshold probability
probability that loss or damage will exceed a specified level

Note 1 to entry: Threshold probability is a quantitative measure that represents the probability of occurrence

associated with unplanned events or levels of damage caused by launch-related activities.

4 Abbreviated terms
FSS flight safety system
FTS flight termination system
GNSS global navigation satellite system
GSE ground support equipment
RTS range tracking system
S&A safe and arm
SFP single failure point
TDTS telemetry data transmitting system
5 General requirements

5.1 All launch vehicles shall incorporate tracking devices or establish means of tracking that enable

real-time monitoring of vehicle position and velocity, and prediction of instantaneous impact points

throughout the launch phase where it is necessary to satisfy the safety envelope requirement.

2 © ISO 2021 – All rights reserved
---------------------- Page: 7 ----------------------
ISO 14620-3:2021(E)

5.2 All spent stages shall incorporate tracking devices or establish means of tracking that enable real-

time monitoring of vehicle position and velocity, except when pre-flight analysis establishes that the

stage separation activity will not result in an unknown or hazardous impact area or dispersion.

5.3 All launch vehicles shall incorporate TDTSs for monitoring vehicle performance data and the FTS

and tracking system status that are capable of functioning throughout the launch phase until the end of

range safety responsibility.

5.4 Any launch vehicle having a stage, motor or component capable of violating the defined safety

envelope shall be equipped with an FTS that interrupts the flight of the vehicle if it diverts from its

predicted flight trajectory and has sufficient energy to become a threat to public safety.

5.5 All the FTSs, telemetry and tracking systems of launch
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 14620-3
ISO/TC 20/SC 14
Space systems — Safety
Secretariat: ANSI
requirements —
Voting begins on:
2021-05-18
Part 3:
Voting terminates on:
Flight safety systems
2021-07-13
Systèmes spatiaux — Exigences de sécurité —
Partie 3: Systèmes de sauvegarde en vol
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 14620-3:2021(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2021
---------------------- Page: 1 ----------------------
ISO/FDIS 14620-3:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

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 or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 14620-3:2021(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Abbreviated terms .............................................................................................................................................................................................. 2

5 General requirements ..................................................................................................................................................................................... 2

6 Flight termination system requirements .................................................................................................................................... 3

6.1 General ........................................................................................................................................................................................................... 3

6.2 Flight termination system safe and arm devices ....................................................................................................... 4

6.3 Flight termination system ordnance .................................................................................................................................... 5

6.4 Ground support equipment ......................................................................................................................................................... 5

7 Range tracking system requirements ............................................................................................................................................. 6

7.1 Description ................................................................................................................................................................................................. 6

7.2 Requirements ........................................................................................................................................................................................... 6

8 Telemetry data transmitting system requirements ......................................................................................................... 7

8.1 Description ................................................................................................................................................................................................. 7

8.2 Requirements ........................................................................................................................................................................................... 7

© ISO 2021 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/FDIS 14620-3:2021(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.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

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. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see 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.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles,

Subcommittee SC 14, Space systems and operations.

This second edition cancels and replaces the first edition (ISO 14620-3:2005), which has been

technically revised. The main changes compared with the previous edition are as follows:

— the text has been updated to be consistent with ISO 14620-1 and ISO 14620-2.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/FDIS 14620-3:2021(E)
Introduction

Space launch activities can present hazards to people and damage to property and the environment.

International space treaties adopted by the United Nations impose legal liabilities on countries involved

in launching space vehicles to provide compensation for certain injuries and damages incurred as the

result of such launches.

This document affects the safety of exposed people, property and environment, as well as countries

and organizations conducting commercial or civil launch activities.
© ISO 2021 – All rights reserved v
---------------------- Page: 5 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 14620-3:2021(E)
Space systems — Safety requirements —
Part 3:
Flight safety systems
1 Scope

This document sets out the minimum requirements for flight safety systems (FSSs), including flight

termination systems (FTSs, externally controlled systems or on-board automatic systems), tracking

systems, and telemetry data transmitting systems (TDTSs) for commercial or non-commercial launch

activities of orbital or suborbital, unmanned space vehicles. The intent is to minimize the risk of injury

or damage to persons, property or the environment resulting from the launching of space vehicles.

This document can be applied by any country, by any international organization, whether

intergovernmental or not, and by any agency or operator undertaking the launching of space vehicles.

This document is intended to be applied by any person, organization, entity, operator or launch

authority participating in commercial or non-commercial launch activities of orbital, or suborbital,

unmanned space vehicles unless more restrictive requirements are imposed by the launch site country.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 10795, Space systems — Programme management and quality — Vocabulary
ISO 14620-1, Space systems — Safety requirements — Part 1: System safety

ISO 14620-2, Space systems — Safety requirements — Part 2: Launch site operations

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 10795, ISO 14620-2 and the

following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
flight safety system

combination of flight-, ground- or space-based hardware and software designed, installed and/or

operated specifically for providing flight safety

Note 1 to entry: This combination of equipment, facilities, procedures and personnel required to monitor

operations provides protection to personnel and property both foreign and domestic from any damage that can

be caused by a non-nominal flight.

Note 2 to entry: The flight safety system may include flight termination systems (3.2), telemetry data transmitting

systems (3.6) and range tracking systems (3.4).
© ISO 2021 – All rights reserved 1
---------------------- Page: 6 ----------------------
ISO/FDIS 14620-3:2021(E)
3.2
flight termination system

explosive or other disabling or thrust-terminating equipment installed in a launch vehicle, plus any

associated ground equipment, for terminating the flight of a malfunctioning vehicle or stage

3.3
launch

initial action to place, or attempt to place, a launch vehicle and payload, if any, in a suborbital trajectory,

in Earth orbit in outer space, or otherwise in outer space
3.4
range tracking system

combination of flight-, ground- or space-based hardware and software designed, installed and/or

operated specifically for tracking a launch vehicle
3.5
safety envelope

area designated for launch (3.3) and preorbital flight that is cleared of uninvolved persons or where the

risk of injury, fatality or property damage to the public is below a designated threshold probability (3.7)

3.6
telemetry data transmitting system

combination of flight- or space-based hardware and software, designed, installed or operated for down-

linking vehicle and flight system performance and health data to flight safety operators

3.7
threshold probability
probability that loss or damage will exceed a specified level

Note 1 to entry: Threshold probability is a quantitative measure that represents the probability of occurrence

associated with unplanned events or levels of damage caused by launch-related activities.

4 Abbreviated terms
FSS flight safety system
FTS flight termination system
GNSS global navigation satellite system
GSE ground support equipment
RTS range tracking system
S&A safe and arm
SFP single failure point
TDTS telemetry data transmitting system
5 General requirements

5.1 All launch vehicles shall incorporate tracking devices or establish means of tracking that enable

real-time monitoring of vehicle position and velocity, and prediction of instantaneous impact points

throughout the launch phase where it is necessary to satisfy the safety envelope requirement.

2 © ISO 2021 – All rights reserved
---------------------- Page: 7 ----------------------
ISO/FDIS 14620-3:2021(E)

5.2 All spent stages shall incorporate tracking devices or establish means of tracking that enable real-

time monitoring of vehicle position and velocity, except when pre-flight analysis establishes that the

stage separation activity will not result in an unknown or hazardous impact area or dispersion.

5.3 All launch vehicles shall incorporate TDTSs for monitoring vehicle performance data and the FTS

and tracking system status that are capable of functioning throughout the launch phase until the end of

range safety responsibility.
5.4 Any launch vehicle having a stage, motor or
...

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