ISO 19933:2007

INTERNATIONAL ISO
STANDARD 19933
First edition
2007-07-01

Space systems — Format for spacecraft
launch environment test report
Systèmes spatiaux — Format de rapport d'essais d'environnement de
lancement de véhicule spatial




Reference number
ISO 19933:2007(E)
©
ISO 2007

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ISO 19933:2007(E)
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ISO 19933:2007(E)
Contents Page
Foreword. v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and abbreviated terms . 1
3.1 Terms and definitions. 1
3.2 Abbreviated terms . 2
4 Introduction section of a test report. 2
4.1 General. 2
4.2 Overall test sequence. 2
5 Referenced documentation section of a test report . 3
5.1 General. 3
5.2 Normative references . 3
5.3 Applicable references. 3
5.4 Informative references . 4
6 Nomenclature section of a test report. 4
7 Test objective section of a test report. 4
7.1 General. 4
7.2 Test strategy matrix. 4
8 Test article configuration section of a test report.4
8.1 General. 4
8.2 Identification and general configuration matrix . 5
8.3 Deviations from flight configuration. 5
8.4 Functional configuration. 5
9 Test facility configuration section of a test report .5
9.1 General. 5
9.2 Test configuration. 5
9.3 Test facility constraints and limitations . 6
10 Test description section of a test report . 6
10.1 General. 6
10.2 Test approach and methodology . 6
10.3 Test flow . 6
10.4 Supporting analyses. 6
10.5 Input parameters, tolerances and limits. 6
10.6 Instrumentation. 6
10.7 Success criteria . 6
11 Test results section of test reports. 7
11.1 Static load. 7
11.2 Modal survey. 8
11.3 Sine vibration . 9
11.4 Acoustic noise . 11
11.5 Random vibration . 13
11.6 Shocks . 14
11.7 Electromagnetic compatibility. 16
12 Test result evaluation section of a test report.17
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ISO 19933:2007(E)
13 Test deviations section of a test report . 17
14 Test conclusion section of a test report. 18
Bibliography . 19

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ISO 19933:2007(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 19933 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee
SC 14, Space systems and operations.
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ISO 19933:2007(E)
Introduction
This International Standard provides spacecraft (SC) manufacturers with a specific format to write launch
environment test reports required to qualify the SC to the launch environment conditions. The format has been
applied satisfactorily for many years to most of the commercial launch vehicle (LV) systems in agreement with
SC manufacturers worldwide.
The format follows the overall guidelines of ISO 17566 with the objective of generating self-contained
documents. Relevant sections of the standard test plan, specification, procedure, and report documents are
combined to form the comprehensive and compact SC launch environment test reports requested by LV
service providers.
The format for the following sections of the test reports is independent of the nature of the test: introduction,
documentation, nomenclature, test objectives, test article configuration, test facility configuration, test
description, test result evaluation, test deviations, and test conclusions. For this reason, a unique format is
specified for all types of tests in Clauses 4, 5, 6, 7, 8, 9, 10, 12, 13, and 14.
The format for the presentation of test results is specific to the test in question. For this reason, Clause 11 is
divided into multiple subclauses, corresponding to all types of tests that are required to qualify SC to the
launch environment.
In principle, there is one test report per type of test; however, several test reports may be combined if deemed
appropriate.
SC organizations may include additional test topics if required. Conversely, some sections of this test report
format may not apply to the launch services in question, in which case it is advisable that they be ignored.

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INTERNATIONAL STANDARD ISO 19933:2007(E)

Space systems — Format for spacecraft launch environment
test report
1 Scope
This International Standard provides a specific format to report the test process and results of spacecraft (SC)
qualification to the launch environment. The following types of tests are considered:
⎯ static load;
⎯ modal survey;
⎯ sine vibration;
⎯ acoustic noise;
⎯ random vibration;
⎯ shock; and
⎯ electromagnetic compatibility (EMC).
The definition of test specifications and test requirements are derived from launch vehicle (LV) user’s manuals
as defined in ISO 14303. Only those tests that are intended to demonstrate the compliance of a given SC
design with its LV environment are taken into consideration.
2 Normative references
The following referenced documents are indispensable for the application 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 14303, Space systems — Launch-vehicle-to-spacecraft interfaces
ISO 15863, Space systems — Spacecraft-to-launch-vehicle interface control document
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
SC adaptor
structure that mates the SC to the LV and includes the separation system for SC/LV separation
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ISO 19933:2007(E)
3.1.2
line load of a force
ratio of the resultant axial force applied to the SC centre of gravity (CG) to the perimeter of the SC adaptor
interface
3.1.3
line load of a moment
ratio of the resultant moment applied to the SC CG to the surface area delimited by the perimeter of the SC
adaptor interface
NOTE The line load definition is not applicable to point-to-point interfaces.
3.2 Abbreviated terms
CG centre of gravity
CLA coupled-loads analysis
dB decibel
EMC electromagnetic compatibility
2
g acceleration unit (9.81 m/s )
Hz hertz
LV launch vehicle
m metre
N Newton
PSD power spectral density
rms root mean square
s second
SC spacecraft
V volt
4 Introduction section of a test report
4.1 General
This section shall provide general information about the technical content of the test report in question. It shall
include a brief description of the test or sequence of tests. The overall test objective shall be described, and
the criteria for the test article qualification or acceptance shall be stated.
4.2 Overall test sequence
This section shall summarize the overall sequence of environmental tests conducted to demonstrate the
qualification or acceptance status of the SC to the launch environment and shall explain how the test in
question fits into this sequence.
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ISO 19933:2007(E)
The following types of tests shall be considered if applicable to the SC test programme:
⎯ static load;
⎯ modal survey;
⎯ sine vibration;
⎯ acoustic noise;
⎯ random vibration;
⎯ shock; and
⎯ EMC.
5 Referenced documentation section of a test report
5.1 General
This section shall contain a list of documents to which reference is made in the test report in question. The
documentation list may include
⎯ normative references,
⎯ applicable references, or
⎯ informative references.
5.2 Normative references
Normative references are published standards and specifications which provide requirements or constraints
for conducting the test. The required format for the list of normative documents is shown below.
Revision level and
Document number Document description
release date


5.3 Applicable references
Applicable references are programme-related documents which provide requirements or constraints for
conducting the test. The required format for the list of reference documents is shown below.
Revision level and
Document number Document description
release date


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ISO 19933:2007(E)
5.4 Informative references
Informative references are documents included for information only, which amplify or clarify the document
content but do not contain requirements applicable to the test. The required format for the list of informative
documents is shown below.
Revision level and
Document number Document description
release date


6 Nomenclature section of a test report
The Terms and definitions section shall define the specific terms used in the test report in question. In some
cases, a project dictionary or glossary may be referenced.
The Symbols section shall give a list of the symbols used in the test report in question. Unless there is a need
to list symbols in a specific order to reflect technical criteria, all symbols shall be listed in alphabetical order.
The Abbreviations section shall define the abbreviations used in the test report in question.
7 Test objective section of a test report
7.1 General
This section shall detail the general and specific test objectives in the context of the SC design and launch
environment test requirements of the LV service provider.
7.2 Test strategy matrix
The test strategy matrix shall define the testing strategies that will be used to demonstrate compliance with the
LV service provider’s requirements related to the SC design and tests as specified in the LV user’s manual
(ISO 14303) and in the LV-SC interface control document (ISO 15863). The required format for the strategy
matrix is shown below.
Paragraph Test strategy to
Document Requirement
reference demonstrate compliance


8 Test article configuration section of a test report
8.1 General
This section shall describe the general test article configuration, including the corresponding reference frame
definition and mass properties, relevant figures or the references of relevant drawings. When necessary, it
shall document how the configuration supports the overall test objectives.
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ISO 19933:2007(E)
8.2 Identification and general configuration matrix
All major pieces of hardware and equipment and all the critical launch environment structural elements
(including, but not limited to, the primary structure, platforms, supporting struts, propellant tanks and
associated support structures and fastenings, pressure vessels, solar panels and related mechanisms, battery
packs, reflectors, antennas and critical payload package) shall be listed in the configuration matrix and
identified as flight-standard, flight-representative, or simulated items. The required format for the configuration
matrix is shown below.
Item Flight-standard Flight-representative Simulated


8.3 Deviations from flight configuration
Deviations of the general test article configuration from the flight configuration that are critical for the
qualification of the SC with respect to the launch environment shall be identified (see 8.2). The qualification
logic with respect to the overall system qualification of those items that are not in the flight standard category
shall be explained.
8.4 Functional configuration
The state of physical systems of the test article shall be described and compared to the expected SC launch
configuration. Any change of functional configuration in the course of the test shall be mentioned. The
functional configuration addresses the operational mode of the test article and the state of the major electrical
systems, including, but not limited to, radio-electrical, pyrotechnic, attitude control and thermal subsystems.
9 Test facility configuration section of a test report
9.1 General
This section shall describe the overall test facility configuration as run during the test. In addition, the test
facility, its location and the test date(s) shall be indicated.
9.2 Test configuration
9.2.1 General configuration
The general test set-up shall be briefly outlined, including relevant figures or the references of relevant
drawings. This outline shall include concise information about the test equipment, instrumentation, interfaces
to the test article, environmental conditions, data acquisition system and any specific infrastructure required to
perform the test.
9.2.2 Test adaptor
Special emphasis shall be given to the description of the interface between the test facility and the test article
(test adaptor) if the behaviour of the test article during the test can be affected by the adaptor. In this case, the
Test result section (see Clause 11) shall explain how the characteristics of the test adaptor affect the test
results with respect to mechanics, acoustics and EMC.
9.2.3 As-run configuration
If the planned test configuration is modified as the test develops, the resulting changes, their causes and the
potential effects on the test procedure or test results (see Clause 11) shall be explained.
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ISO 19933:2007(E)
9.3 Test facility constraints and limitations
Potential constraints related to operational or safety limitations of the test facility shall be indicated when these
limitations have an effect on the test objectives. The nature of these limitations shall be explained in the Test
description section (see Clause 10) and in the Test results section (see Clause 11).
10 Test description section of a test report
10.1 General
This section shall provide a description of the test, test flow, test prediction analyses, test input data and
instrumentation.
10.2 Test approach and methodology
A description of the logic behind the test approach and of the methods used shall be provided.
10.3 Test flow
The various steps of the test shall be listed with the corresponding levels and durations relative to the nominal
test goal (full level, nominal duration).
10.4 Supporting analyses
A general description of the analyses performed in support of the test execution shall be provided with the
references of the corresponding documentation.
10.5 Input parameters, tolerances and limits
For each step of the test, the actual test input data shall be provided in numerical and/or in tabular form as
appropriate. The corresponding tolerances and limits related to the performance of the test facility and
associated control system shall be clearly indicated (including alarm levels and abort limits).
10.6 Instrumentation
The complete list of measurement devices used during the test shall be provided with the following
characteristics:
⎯ identification;
⎯ measurement type;
⎯ calibration method;
⎯ measurement range and tolerances; and
⎯ exact location with respect to the reference frame of the test article.
When useful, a drawing of the measurement devices arrangement shall be provided.
10.7 Success criteria
The success criteria of the test shall be listed and their applicability shall be defined for each step of the test.
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ISO 19933:2007(E)
11 Test results section of test reports
11.1 Static load
11.1.1 Interface loads
The resultant maximal forces at the SC or SC structural model interface shall be presented in the format of the
table below. The components of the interface forces shall be taken either from direct measurements or
deduced by calculation from the set of applied loads and corresponding locations.
Test case Type Longitudinal force Lateral force Moment Test/reference
identification (comp./tension) analysis
N N N ⋅ m


The following definitions shall apply:
⎯ test case identification: reference name or number of test case;
⎯ test case: definition of the load or combination of loads applied for this load case;
⎯ type (comp./tension): compression load or tension load;
⎯ longitudinal force: resultant of maximal applied longitudinal forces, in newtons;
⎯ lateral force: resultant of maximal applied lateral forces, in newtons;
⎯ moment: resultant of maximal applied moments, in newton-metres;
⎯ test/reference analysis: ratio between the results of the test case and a reference analysis.
NOTE In practice, the reference analysis can be a LV-SC dynamic coupled-loads analysis.
11.1.2 CG equivalent accelerations
The resultant maximal equivalent accelerations at the SC or SC test model CG calculated from the set of
applied loads and corresponding locations shall be presented in the format of the table below.
Test case Type Longitudinal CG Lateral CG Maximum Test/reference
identification (comp./tension) acceleration acceleration line load line loads
g g N/m


The following definitions shall apply:
⎯ test case identification: reference name or number of test case;
⎯ test case: definition of the combination of equivalent accelerations applied for this load case;
⎯ type (comp./tension): compression acceleration or tension acceleration;
⎯ longitudinal CG acceleration: maximal equivalent longitudinal acceleration about the CG, in g;
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ISO 19933:2007(E)
⎯ lateral CG acceleration: maximal equivalent lateral acceleration about the CG, in g;
⎯ maximum line load: line load resulting from maximal applied equivalent accelerations, in newtons per
metre;
⎯ test/reference line loads: ratio in terms of line load of the results of the test case to the equivalent loads
defined in the LV user’s manual.
NOTE It is advisable to indicate the test article mass properties used for the calculation of the line load with
consistent units.
11.1.3 Additional test results
Upon LV service provider request, additional test results shall be provided for individual components of the
test article, including, but not limited to, applied loads, stresses, strains and displacements.
11.2 Modal survey
11.2.1 Modal test correlation table
The results of the SC or SC structural model modal survey test shall be presented in the format of the table
below. The modal test correlation table shall contain all of the measured structural modes that may have a
significant effect on the responses of the SC dynamic structural model.
Mode Measured Calculated Measured Calculated Measured Mode Notes
identification mode mode modal modal modal description
frequency frequency effective mass effective mass damping
Hz Hz kg kg %


The following definitions shall apply:
⎯ mode identification: reference name or reference number of the structural mode;
⎯ measured mode frequency: frequency of the structural mode, in hertz, as measured during the test;
⎯ calculated mode frequency: frequency of the structural mode, in hertz, as calculated in the SC dynamic
structural model;
⎯ measured modal effective mass: modal effective mass of the structural mode, in kilograms, as measured
during the test;
⎯ calculated modal effective mass: modal effective mass of the structural mode, in kilograms, as calculated
in the SC dynamic structural model;
⎯ measured modal damping: damping of the structural mode, in terms of percentage of critical damping, as
measured during the test;
⎯ mode description: physical characteristics of the structural mode (SC part and type of deformation);
⎯ notes: optional additional information provided for clarification.
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ISO 19933:2007(E)
11.2.2 SC dynamic structural model update
The potential mathematical model updates to be completed in order to achieve an acceptable correlation
between the SC structure and the SC dynamic structural model shall be indicated by referring to the results
presented in the modal correlation table.
11.3 Sine vibration
11.3.1 General
In general, only the full-level sine test runs shall be considered in the SC sine vibration test report.
11.3.2 Input profiles
For each SC axis submitted to a sine vibration test, the actual full-level input acceleration injected at the SC
interface shall be presented in a graph as a function of the frequency with indication of the corresponding
sweep rate. The comparison with the predicted input shall be made on a separate diagram with the same
scale.
When available, the same type of information shall be provided for the actual full-level input force or moment
injected at the SC interface. As a minimum, the maximum value of the input force or moment shall be
indicated. In addition, the method of measurement shall be explained.
11.3.3 SC dynamic model definition
The definition of the SC dynamic model used for the corresponding LV-SC coupled-loads analysis and sine
test prediction shall be given with the reference of the related documentation.
11.3.4 Active limiting accelerometers
For each SC axis submitted to a sine vibration test, the list of active limiting accelerometers shall be presented
in the format of the table below.
Acce
...