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ICE Cubes - ICE Cubes Service
Reference :   ICU-SA-RQ-004
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                ICE Cubes Facility to Experiment Cube IRD

                             ICE Cubes

Title       :   ICE Cubes Facility to Experiment Cube IRD

Abstract    :   This document provides a comprehensive interface definition between
                the ICE Cubes Facility (ICF) and the Experiment Cube to the ICE
                Cubes service customer (i.e. Experiment Cube development
                responsible).

                This IRD is to be complemented by the guidelines ICU-SA-TN-011
                [RD1] and the ICD template ICU-SA-ICD-002 [RD2].

                All three documents are updated at regular intervals. Before
                proceeding, the reader shall ensure to be in possession of the latest
                versions by checking on our website:
                http://icecubesservice.com/

                         International Commercial
                            Experiments Service

           Copyright by Space Applications Services – All Rights Reserved
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                               ICE Cubes Facility to Experiment Cube IRD

                                    DOCUMENT APPROVAL SHEET

Responsibility   Name and Position        Company                          Signature and Date

Prepared by:     ICE Cubes Team           Space Applications Services

Checked by:      T. Peignier              Space Applications Services
                 System Engineer

PA Checked by:   L. Tazi                  Space Applications Services
                 PA&S Engineer

Approved by:     M. Ricci                 Space Applications Services
                 Project Manager

                                  Space Applications Services NV/SA

                                     www.spaceapplications.com

                       Leuvensesteenweg 325           1932 Sint-Stevens-Woluwe

                      (Brussels Area), Belgium        Tel: +32-(0)2-721.54.84

                                   This document is the property of

                                 Space Applications Services NV/SA.

                                          All rights reserved.

                      Copyright by Space Applications Services – All Rights Reserved
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                             ICE Cubes Facility to Experiment Cube IRD

                                   DOCUMENT CHANGE RECORD

Version   Date      Author        Changed Sections /           Reason for Change / RID No
                                  Pages

1.0.0     29-Jul-   ICE Cubes                                  Initial release
          2016      Team

1.1.3     30-Jan-   ICE Cubes     All                          Draft release for PDR
          2017      Team

1.2.0     16-Mar-   ICE Cubes     §1.3, §3.4.1, §3.5.1,        Update of RDs; Electrical interface update;
          2018      Team          §3.6.1, §3.6.3, §3.6.5,      Addition of clarifications about communications
                                  §3.6.7, §3.8.1, §3.8.10,     between UHBs and Experiment Cubes, and
                                  Appendix A, Appendix         about antivirus; Addition of §3.6.7; Deletion of
                                  C, Appendix D                §4.2.3.7 to §4.2.3.9; Addition of Appendix A
                                                               and Appendix D; Update of Appendix C;
                                                               Editorial corrections throughout the document

1.2.1     20-Apr-   ICE Cubes     §3.4.1, §3.5.1.3             Figure 13 minor update; Addition of capacitive
          2018      Team                                       coupling requirement

1.3.0     29-Aug-   ICE Cubes     §1.1, §1.2, §1.3, §2.1,      Deletion of AD1; Addition/update of RDs;
          2018      Team          §2.2, §2.3, §2.4, §3.1.1,    Update of figures; Addition of §2.3.1, §2.3.2,
                                  §3.1.3, §3.1.7, §3.1.8,      §2.4.1, §2.4.2; Addition of clarifications (e.g.
                                  §3.2.1, §3.2.2, §3.2.3,      notes); Update of requirements; Deletion of
                                  §3.3.2, §3.3.4, §3.5.2,      §3.6.3; Addition of §3.8.7 and §3.9.3; Update
                                  §3.5.3, §3.6.3, §3.6.4,      of Appendix A and Appendix C
                                  §3.8.3, §3.8.7, §3.8.8,
                                                               All changes above are indicated by black bars
                                  §3.9.2, §3.9.3, §4.2.1,
                                                               in the page margins
                                  Appendix A, Appendix
                                  C                            Editorial corrections (not indicated by black
                                                               bars) throughout the document

1.4.0     15-Feb-   ICE Cubes     §1.1, §1.3, §1.4, §2.1,      Addition of clarifications (e.g. notes); Deletion
          2019      Team          §3.1.1, §3.1.2, §3.1.5,      of RD3, RD7 and RD20; Addition of RDs;
                                  §3.1.7.1, §3.1.8,            Addition of acronyms; Update of requirements
                                  §3.2.1.1, §3.2.1.3,          and figures; Addition of §3.4.4, §3.4.5, §3.5.5,
                                  §3.2.3, §3.3.4, §3.4.1,      §3.6.7, §3.8.11 and §5; Merging of §3.5.2.6
                                  §3.4.4, §3.4.5, §3.5.1.2,    with §3.5.2; Splitting of §3.5.3; Splitting of
                                  §3.5.1.3, §3.5.2,            §3.6.4; Moving §4.2.2.5 to §4.2.3.7; Update of
                                  §3.5.2.3, §3.5.3, §3.5.5,    Appendix A and Appendix D
                                  §3.6.1, §3.6.3, §3.6.4,
                                                               All changes above are indicated by black bars
                                  §3.6.5, §3.6.7, §3.7.4,
                                                               in the page margins
                                  §3.7.5, §3.8.11,
                                  §3.8.12, §3.9.2, §4.1,       Editorial corrections (not indicated by black
                                  §4.2.2.1, §4.2.2.3,          bars) throughout the document
                                  §4.2.2.4, §4.2.3.7, §4.3,
                                  §5, Appendix A,
                                  Appendix D

1.4.1     20-Feb-   ICE Cubes     §3.6.4.5, §3.5.2.4,          Addition of §3.6.4.5; Distance added in
          2019      Team          Appendix A                   §3.5.2.4 (black bars in the page margin kept)

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                             ICE Cubes Facility to Experiment Cube IRD

                                   DOCUMENT CHANGE RECORD

Version   Date      Author        Changed Sections /           Reason for Change / RID No
                                  Pages

1.5.0     27-Mar-   ICE Cubes     §1.4, §3.1.5, §3.1.9,        Update of requirements; Addition of §3.1.9 and
          2019      Team          §3.4.2, §3.4.3, §3.5.2.1,    §3.6.8; Addition of references to FSDP and
                                  §3.5.2.2, §3.6.2,            ICD in Appendix A; Editorial corrections
                                  §3.6.4.3, §3.6.8, §3.9.2,
                                                               All changes are indicated by black bars in the
                                  §4, §4.1, Appendix A
                                                               page margins

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                                       ICE Cubes Facility to Experiment Cube IRD

                                                  Table of Contents
1   Introduction ............................................................................................................................... 10
    1.1        Purpose and Scope ........................................................................................................ 10
    1.2        Applicable Documents .................................................................................................... 10
    1.3        Reference Documents .................................................................................................... 10
    1.4        Acronyms ........................................................................................................................ 11
2   ICE Cubes Flight Segment Overview ...................................................................................... 14
    2.1        The ICE Cubes Facility (ICF) ......................................................................................... 14
    2.2        The Framework .............................................................................................................. 15
    2.3        “Internal” Experiment Cubes .......................................................................................... 16
               2.3.1       Experiment Cube Locations on the ICF ............................................................ 17
               2.3.2       ICF Sliding Door ................................................................................................ 18
    2.4        “External” Experiment Cubes & Other Payloads ............................................................ 19
               2.4.1       ICF J21 Connector (DB13W3S) ........................................................................ 21
               2.4.2       ICF J22 Connector (RJFTV71N) ....................................................................... 21
    2.5        Thermal Cooling ............................................................................................................. 21
3   Experiment Cube Flight Interface Requirements ................................................................... 23
    3.1        Mechanical Requirements .............................................................................................. 23
               3.1.1       Experiment Cube Connector & Feet ................................................................. 23
               3.1.2       Outer Surfaces & Protrusions ............................................................................ 24
               3.1.3       Fins, Vents & Fans ............................................................................................ 24
               3.1.4       Standard Form Factors ...................................................................................... 25
               3.1.5       Dimensions ........................................................................................................ 25
               3.1.6       Sharp Edges ...................................................................................................... 26
               3.1.7       Audible Noise..................................................................................................... 26
                           3.1.7.1          Continuous Noise Limits .................................................................. 26
                           3.1.7.2          Intermittent Noise Limits .................................................................. 26
                           3.1.7.3          Audible Noise Limits Verification ..................................................... 26
               3.1.8       Microgravity Disturbances ................................................................................. 26
               3.1.9       Mass and Centre of Gravity (CoG) .................................................................... 27
    3.2        Structural & Environmental Interface Requirements ...................................................... 27
               3.2.1       Environmental Conditions .................................................................................. 27
                           3.2.1.1          Temperature, Pressure & Humidity Conditions ............................... 27
                           3.2.1.2          Depressurization/Re-Pressurization Conditions .............................. 28
                           3.2.1.3          Thermal Environment inside the ICE Cubes Facility ....................... 28
               3.2.2       Launch & Landing Loads ................................................................................... 28

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                             ICE Cubes Facility to Experiment Cube IRD

      3.2.3      Random Vibration Loads ................................................................................... 29
      3.2.4      Shock Loads ...................................................................................................... 29
3.3   Thermal Requirements ................................................................................................... 29
      3.3.1      Temperature Control ......................................................................................... 29
      3.3.2      Touch Temperature ........................................................................................... 29
      3.3.3      Thermal Sensor ................................................................................................. 29
      3.3.4      Condensation Prevention .................................................................................. 30
3.4   Electrical Interface Requirements .................................................................................. 30
      3.4.1      DB13W3 Connector Proprietary Wiring ............................................................. 30
      3.4.2      Power ................................................................................................................. 31
      3.4.3      Unexpected Power Loss .................................................................................... 31
      3.4.4      Power Circuit Protection & Inrush Current ........................................................ 31
      3.4.5      Input Capacitor .................................................................................................. 32
3.5   Electrical & Electromagnetic Compatibility (EMC) Requirements .................................. 32
      3.5.1      Grounding, Bonding & Isolation ......................................................................... 32
                 3.5.1.1          Grounding (i.e. Ground Return) ....................................................... 32
                 3.5.1.2          Bonding (i.e. Chassis Ground) ........................................................ 32
                 3.5.1.3          Isolation ........................................................................................... 33
      3.5.2      Electromagnetic Interference (EMI) ................................................................... 33
                 3.5.2.1          E-Field Radiated Emissions ............................................................ 33
                 3.5.2.2          B-Field Radiated Emissions ............................................................ 34
                 3.5.2.3          Conducted Emissions ...................................................................... 35
                 3.5.2.4          Radiated Susceptibility / Immunity................................................... 35
                 3.5.2.5          Conducted Susceptibility / Immunity................................................ 36
      3.5.3      Electrostatic Discharge (ESD) Susceptibility / Immunity ................................... 38
                 3.5.3.1          ESD Susceptibility Tests ................................................................. 38
                 3.5.3.2          Caution Label (ESD Sensitive Cube) .............................................. 38
      3.5.4      DC Magnetic Fields ........................................................................................... 38
      3.5.5      Burn-In ............................................................................................................... 38
3.6   Data & Communication Interface Requirements ............................................................ 38
      3.6.1      Experiment Cube IP Communication ................................................................ 39
      3.6.2      Experiment Cubes Data Synchronisation Service............................................. 39
      3.6.3      Experiment Cube Download of Data ................................................................. 40
      3.6.4      Experiment Cube Software Security ................................................................. 40
                 3.6.4.1          Anti-Virus Protection ........................................................................ 40
                 3.6.4.2          Periodic Virus Signatures Definitions List Update ........................... 40

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                        3.6.4.3          OS Hardening .................................................................................. 40
                        3.6.4.4          In-Orbit OS Update .......................................................................... 41
                        3.6.4.5          Encrypted Communications ............................................................. 41
             3.6.5      Ethernet Interface .............................................................................................. 41
             3.6.6      Intentional Transmitters & Receivers ................................................................ 41
             3.6.7      GPS Time Synchronisation ............................................................................... 41
             3.6.8      Data Rates ......................................................................................................... 41
    3.7      Materials Requirements ................................................................................................. 42
             3.7.1      Declared Materials List (DML) ........................................................................... 42
             3.7.2      Forbidden Materials & Components .................................................................. 42
             3.7.3      Surface Treatments & Protective Coatings ....................................................... 42
             3.7.4      Flammability....................................................................................................... 42
             3.7.5      Offgassing.......................................................................................................... 42
             3.7.6      Fasteners Locking ............................................................................................. 42
    3.8      Safety Requirements ...................................................................................................... 43
             3.8.1      Collection of Safety-Related Data ..................................................................... 43
             3.8.2      Non-Conformity with Requirements .................................................................. 43
             3.8.3      Containment ...................................................................................................... 43
             3.8.4      Volatile Organic Compound............................................................................... 43
             3.8.5      Glass or Frangible Materials Release ............................................................... 43
             3.8.6      Lasers ................................................................................................................ 43
             3.8.7      Light Sources ..................................................................................................... 43
             3.8.8      Batteries & (Super-) Capacitors......................................................................... 43
             3.8.9      Pyrotechnics ...................................................................................................... 44
             3.8.10 Smoke & Fire Detection ..................................................................................... 44
             3.8.11 Circuit Protection, Wire Sizing & Derating ......................................................... 44
             3.8.12 Flight Readiness Certification ............................................................................ 44
    3.9      Human Factor Interface Requirements .......................................................................... 44
             3.9.1      Astronaut Interaction ......................................................................................... 44
             3.9.2      Identification & Marking ..................................................................................... 44
             3.9.3      Crew Safety ....................................................................................................... 45
    3.10     Reliability Requirements ................................................................................................. 45
4   Experiment Cube Ground Interface Requirements ............................................................... 46
    4.1      Hardware Interface ......................................................................................................... 46
    4.2      Software Interface .......................................................................................................... 46
             4.2.1      UHB to ICMCC Interface Overview ................................................................... 46

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                    4.2.2      Mandatory Software Interface Requirements .................................................... 47
                               4.2.2.1        Software Host .................................................................................. 47
                               4.2.2.2        Connection to the ICMCC ................................................................ 47
                               4.2.2.3        Two-Factor Authentication ............................................................... 47
                               4.2.2.4        Security, Split Tunnelling ................................................................. 47
                    4.2.3      Optional Software Interface Requirements ....................................................... 47
                               4.2.3.1        Data Synchronisation Service Downlink .......................................... 48
                               4.2.3.2        Data Synchronisation Service Uplink .............................................. 48
                               4.2.3.3        Private IP Address ........................................................................... 48
                               4.2.3.4        Direct TCP & UDP Communication ................................................. 48
                               4.2.3.5        TCP & UDP Protocol ....................................................................... 48
                               4.2.3.6        UDP Connection .............................................................................. 48
                               4.2.3.7        UTC Time Synchronisation .............................................................. 48
        4.3         Experiment Cube Unit-to-System Testing ...................................................................... 48
5       Experiment Cube to ICE Cubes Interface Test ....................................................................... 49
Appendix A Verification Matrix ........................................................................................................ 50
Appendix B Drawings ....................................................................................................................... 53
Appendix C Random Vibration Loads ............................................................................................. 54
Appendix D Typical Timeline and Required Documents ............................................................... 55

                                                        List of Figures
Figure 1 ICE Cubes Facility closed and open views ............................................................................. 14
Figure 2 Framework features ................................................................................................................ 15
Figure 3 Framework with one 2Ux2U Experiment Cube ....................................................................... 16
Figure 4 1U Experiment Cube with protruding male DB13W3P connector and feet ............................ 16
Figure 5 J01 to J08 connectors positions on the bottom of the Framework ......................................... 17
Figure 6 J09 to J20 connectors positions on the top of the Framework ............................................... 17
Figure 7 ICF sliding door position relative to ICF connector J09 .......................................................... 18
Figure 8 ICF sliding door size (as seen from inside the ICF Container) ............................................... 19
Figure 9 Accommodation of wired external payload (concept) ............................................................. 20
Figure 10 Connectors on the front of the ICF ........................................................................................ 20
Figure 11 AUX LAN J22 connector on the front of the ICF Framework ................................................ 21
Figure 12 Schematics of the forced air cooling inside the ICF Container (top view) ............................ 22
Figure 13 Shell-dimpled DB13W3P male plug (Cube side) .................................................................. 23

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                                          ICE Cubes Facility to Experiment Cube IRD

Figure 14 Protrusions from the –Z Cube wall ........................................................................................ 23
Figure 15 Proper positioning of the DB13W3P connector on a 1U Cube (dimensions in mm) ............ 24
Figure 16 Experiment Cube standard form factors ............................................................................... 25
Figure 17 DB13W3S schematic (receptacle, Framework side) ............................................................ 30
Figure 18 DB13W3P schematic (plug, Cube side) ................................................................................ 30
Figure 19 DB13W3 pin assignment ....................................................................................................... 30
Figure 20 Trip curve (after the ramp time) ............................................................................................. 32
Figure 21 E-field radiated narrowband emission limits (RE02 test method) ......................................... 34
Figure 22 E-field radiated broadband emission limits (RE02 test method) ........................................... 34
Figure 23 AC magnetic radiated emission limits (RE01 test method) ................................................... 35
Figure 24 Radiated susceptibility E-field limit (RS03 test method) ....................................................... 36
Figure 25 Radiated susceptibility B-field limit (RS01 test method) ....................................................... 36
Figure 26 Limits for conducted susceptibility (sine wave) (CS01/CS02 test methods) ......................... 37
Figure 27 Transient pulse definition (CS06 test method) ...................................................................... 37
Figure 28 ICE Cubes communications (concept) .................................................................................. 46

                                                         List of Tables
Table 1 Experiment Cubes standard external dimensions.................................................................... 25
Table 2 Continuous noise limits ............................................................................................................ 26
Table 3 Environmental conditions ......................................................................................................... 27
Table 4 Launch and landing load factors envelope ............................................................................... 28
Table 5 ICE Cubes Internet protocols ................................................................................................... 39
Table 6 LOS impact on communications between a UHB and its Experiment Cube............................ 47
Table 7 Cut-out dimensions for front and rear mounting methods for DB13W3P connector ................ 53
Table 8 Random vibration environment attenuated by 7.6mm of bubblewrap ...................................... 54
Table 9 Random vibration test profile enveloping Dragon and Cygnus ................................................ 54
Table 10 Experiment Cube project typical timeline ............................................................................... 55
Table 11 Documents to be produced by the customer ......................................................................... 55

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                              ICE Cubes Facility to Experiment Cube IRD

1        Introduction

1.1      Purpose and Scope
This Interface Requirements Document (IRD) defines the requirements on external interfaces between
the ICE Cubes Facility (ICF) and the Experiment Cube to be accommodated inside it when using the
ICE Cubes service. In addition, this IRD provides requirements for design and testing of the Experiment
Cube, and software interface requirements necessary for the customer to communicate from ground
with his/her Experiment Cube in orbit.

The present document will be complemented by an addendum dealing with the specific requirements
which are not detailed in this IRD. The Cube-specific addendum will be tailored (by the ICE Cubes
service) based on the Experiment Cube characteristics (e.g. Cube containing batteries or laser).In
addition, this IRD is accompanied by the guidelines ICU-SA-TN-011 [RD1] and ICD Template ICU-SA-
ICD-002 [RD2].

All three documents are updated at regular intervals. Before proceeding, the reader shall ensure to be
in possession of the latest versions by checking on our website: http://icecubesservice.com/

As the individual Experiment Cube is developed, appropriate sections of the IRD will serve as the basis
for establishing a specific Experiment Cube Interface Control Document (ICD) to be agreed with the ICE
Cubes service provider, i.e. Space Applications Services. The ICD (established from the ICD template
[RD2]) shall take over precedence over the IRD for the Experiment Cube for which an ICD exists.

The sections on Experiment Cube requirements take into account the relevant documents listed in §1.3,
and incorporate the technical requirements of the latter documents to the maximum extent compatible
with the technical limitations of the ICF and the programmatic constraints of the ICF development
programme.

1.2      Applicable Documents
The following document establishes requirements that are applicable to the Experiment Cubes.

AD1      deleted

1.3      Reference Documents
The following documents provide information useful in the design, development and verification of the
Experiment Cube. The requirements directly applicable to the Experiment Cube have been already
reported in this IRD, and as such the documents below do not need to be considered as applicable.

RD1      Space Applications Services – Guidelines for Experiment Cube Design and Development,
         ICU-SA-TN-011, latest version

RD2      Space Applications Services – Experiment Cube to ICE Cubes Service ICD Template, ICU-
         SA-ICD-002, latest version

RD3      Astrium – Columbus Pressurized Payloads Interface Requirements Document, COL-RIBRE-
         SPE-0164, Issue 2A, 15-Nov-2013 (+ relevant IRNs)

RD4      NASA – ISS Pressurized Volume Hardware Common Interface Requirements Document:
         International Space Station Program, SSP 50835, Rev. D, April 2013 (+ associated PIRNs)

RD5      SpaceX – C3-1 Dragon Interface Definition Document, SPX-00001047, Version 21, 14-Aug-
         2014

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                             ICE Cubes Facility to Experiment Cube IRD

RD6     ESA – Security Requirements for LAN Connected Payloads, ESA-ISS-COL-SEC-RS-0002,
        Issue 1, 14-Oct-2014

RD7     ISO – General tolerances -- Part 1: Tolerances for linear and angular dimensions without
        individual tolerance indications, ISO 2768-1:1989, 02-Nov-1989

RD8     ISO – General tolerances -- Part 2: Geometrical tolerances for features without individual
        tolerance indications, ISO 2768-2:1989, 02-Nov-1989

RD9     ISO – Space systems -- Safety and compatibility of materials -- Part 1: Determination of
        upward flammability of materials, ISO 14624-1:2003, 01-Jun-2003

RD10    ISO – Space systems -- Safety and compatibility of materials -- Part 2: Determination of
        flammability of electrical-wire insulation and accessory materials, ISO 14624-2:2003, 01-Jun-
        2003

RD11    Underwriters Laboratories – Standard for Tests for Flammability of Plastic Materials for Parts
        in Devices and Appliances, UL 94, 6th edition, 28-Mar-2013

RD12    IETF – Network Time Protocol Version 4: Protocol and Algorithms Specification, RFC 5905,
        Jun-2010

RD13    IETF – Transmission Control Protocol, RFC 793, Sep-1981

RD14    IETF – User Datagram Protocol, RFC 768, 28-Aug-1980

RD15    ESA – Columbus EMC & Power Quality Requirements, COL-ESA-RQ-014, Issue 2 Rev. E,
        10-Dec-2001

RD16    USDOD – Measurement of Electromagnetic Interference Characteristics, MIL-STD-462, 31-
        Jul-1967 (+ Notice 1, 1-Aug-1968, and Notice 2, 1-May-1970)

RD17    CENELEC – Electromagnetic compatibility of multimedia equipment - Emission requirements
        (CISPR 32:2015/COR1:2016), EN 55032:2015/AC:2016-07, Jul-2016

RD18    ECSS – Space product assurance: Derating - EEE components, ECSS-Q-ST-30-11C,
        Rev. 1, 4-Oct-2011

RD19    NASA – Protection of Payload Electrical Power Circuits, TA-92-038, 22-Feb-1993

RD20    Space Applications Services – Appendix A (Organisational and Logistics Aspects) to the
        Experiment Cube to ICE Cubes Interface Test Plan, ICU-SA-PL-019, latest version

RD21    Space Applications Services – Experiment Cube to ICE Cubes Interface Test Procedure,
        ICU-SA-PR-023, latest version

RD22    Space Applications Services – Note to the Customer for the Pre-Handover Preparations of
        an Experiment Cube, ICU-SA-TN-035, latest version

1.4     Acronyms
AD            Applicable Document
AOS           Acquisition of Signal
AWG           American Wire Gauge
CCSDS         Consultative Committee for Space Data Systems
CD            Cube Detection

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CENELEC     European Committee for Electrotechnical Standardization
CFDP        CCSDS File Delivery Protocol
CIS         Center for Internet Security
CIS-CAT     CIS-Configuration Assessment Tool
CoG         Centre of Gravity
COTS        Commercial Off The Shelf
CTB         Cargo Transfer Bag
DC          Direct Current
DDS         Data Distribution Service
DML         Declared Materials List
DPI         Deep Packet Inspection
ECSS        European Cooperation for Space Standardization
EDR         European Drawer Rack
EEE         Electrical, Electronic and Electromechanical
EMC         Electromagnetic Compatibility
EMI         Electromagnetic Interference
EPM         European Physiology Module
ESA         European Space Agency
ESD         Electrostatic Discharge
FSDP        Flight Safety Data Package
FSR         Flight Safety Review
FTP         File Transfer Protocol
GND         Ground
GPS         Global Positioning System
GRE         Generic Routing Encapsulation
HK          Housekeeping
H&S         Health and Status
HTTP        Hypertext Transfer Protocol
HTTPS       HTTP Secure
HTV         H-II Transfer Vehicle
ICD         Interface Control Document
ICE Cubes   International Commercial Experiment Cubes
ICF         ICE Cubes Facility
ICMCC       ICE Cubes Mission Control Centre
ICMP        Internet Control Message Protocol
IETF        Internet Engineering Task Force
IP          Internet Protocol
IRD         Interface Requirements Document
IRN         Interface Revision Notice
ISO         International Organization for Standardization
ISS         International Space Station
LAN         Local Area Network
LED         Light-Emitting Diode
LOS         Loss of Signal
MEVR        Maximum Effective Vent Ratio
N/A         Not Applicable
NASA        National Aeronautics and Space Administration
NLT         Not Later Than
NTP         Network Time Protocol
OS          Operating System
PDR         Preliminary Design Review
PIRN        Preliminary Interface Revision Notice
PKI         Public Key Infrastructure
RD          Reference Document
RDT         Real Data Transport
RFB         Remote Framebuffer

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RID     Review Item Discrepancy
RTCP    RTP Control Protocol
RTP     Real-time Transport Protocol
RTPS    Real Time Publish Subscribe
RTSP    Real Time Streaming Protocol
SFTP    SSH File Transfer Protocol
SCB     Security Control Board
SPL     Sound Pressure Level
SSD     Solid State Drive
SSH     Secure Shell
SSL     Secure Sockets Layer
TBC     To Be Confirmed
TBD     To Be Determined
TC      Telecommand
TCP     Transmission Control Protocol
TIM     Technical Interchange Meeting
TLS     Transport Layer Security
TM      Telemetry
U       Unit (= 10 x 10 x 10 cm)
UDP     User Datagram Protocol
UHB     User Home Base
USB     Universal Serial Bus
USDOD   United States Department of Defense
UTC     Coordinated Universal Time
VNC     Virtual Network Computing
VPN     Virtual Private Network
WAP     Wireless Access Point
WLAN    Wireless Local Area Network
XLS     Microsoft Excel Spreadsheet File Format
XML     Extensible Markup Language
XTCE    XML Telemetric and Command Exchange

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2           ICE Cubes Flight Segment Overview
This section provides an overview of the ICE Cubes Facility (ICF). Detailed information and interface
requirements are provided in section 3 and section 4.

2.1         The ICE Cubes Facility (ICF)
The main characteristics in terms of physical conceptual configuration are briefly highlighted in the
following.

The ICE Cubes Facility (ICF) is composed of:

•   The Framework, accommodating up to 20 Experiment Cubes, and providing power and
    data/commands connectivity.
• The structural Container, to be installed and mechanically fastened inside the hosting rack (EPM)
    on board Columbus.
• Removable mass memory storage devices, namely the Solid State Drives (SSDs) and USB
    flash drives necessary to host the operational software and to physically download the scientific
    data.
The Experiment Cubes are standardized plug-and-play research modules (1U = 10cmx10cmx10cm)
or modular combinations of that basic size.

Views of the ICF with the Framework and the Experiment Cubes are shown in Figure 1.

                                                   ICF Container

    Sliding door
     (within the
    hinged door)

                                            Cooled air inlets
                                            (5x on each side
                                            of the Container)
                                                                                                Experiment Cubes (one
                                                                                                2U and two 1U shown)

                                                                ICF Framework

                         Figure 1 ICE Cubes Facility closed and open views

Unless otherwise specified, all dimensions pertaining to the ICF have standard tolerances, as
specified in ISO 2768-1 [RD7] for linear and angular dimensions and in ISO 2768-2 [RD8] for features.
The applicable tolerance classes are “m” and “K”, respectively.

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    2.2          The Framework
    The Framework (Figure 2) is the central unit that accommodates each Experiment Cube and offers
    services such as power, connectivity and data storage.

    It offers:

    •     Up to 20 active locations (power + gigabit Ethernet) for the accommodation and management of
          “internal” Experiment Cubes, each location is equipped with one DB13W3S female receptacle (J01
          to J20, cf. Figure 5 and Figure 6).
    •     1 active location (in the front), J21, for the accommodation/interfacing of an Experiment Cube
          located externally to the ICF and connected via a cable (cf. Figure 9)
    •     1 Wireless Access Point (WAP) for the management of Experiment Cubes hosted in Columbus and
          connected via a private Wireless Local Area Network (WLAN) generated by the ICF.
    •     2 USB 3.0 Type-A ports (in the front) used, e.g. for connecting USB flash drives
    •     1 auxiliary LAN connector, J22 (RJ45 port)

    The system, including the Experiment Cubes, is monitored and operated from ground.

    Nominal interventions of the astronauts are limited to activation of power switch, exchange of
    Experiment Cubes and, if requested, installing/removing the SSD and USB flash drives used for
    collection of large amounts of scientific data to be physically downloaded to ground.

                                                                                                       DB13W3 receptacles to
                                                                                                       plug Experiment Cubes
                                   Air cooling slits

    Auxiliary LAN
    connector J22
    (dust cap on)

                                                                                                              Sliding guides for
                                                                                                              accommodation in
                                                                                                              Container

Two USB 3.0 slots                                                                                LAN port to/from ground
     (J23 & J24)
                                                                            DB13W3 receptacle J21
                                                                            for one “external” Cube

                                                             Power switch
          Hosting bay for two
            removable SSDs

                                             Figure 2 Framework features

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2.3      “Internal” Experiment Cubes
The “internal” Experiment Cubes (hereafter referred to as “Experiment Cubes” or “Cubes”) can vary per
experiment but will all have to meet basic interface requirements with the Framework such as modular
size, weight, interface, maximum allowable power, etc.

The size of the Experiment Cubes is set to mimic the CubeSat standard, i.e. 10x10x10cm (1 litre) for a
1U Experiment Cube, 20x10x10cm for a 2U Experiment Cube, etc. with one principal difference:
Experiment Cubes can be scaled along two axes in order to offer more flexibility to customers.

                      Figure 3 Framework with one 2Ux2U Experiment Cube

       Figure 4 1U Experiment Cube with protruding male DB13W3P connector and feet

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The Experiment Cubes can be functionally interconnected via the network offered by the Framework.
The ICF housekeeping and the scientific data will be stored on a removable SSD and will be downlinked
to ground according to the capabilities offered by the ISS infrastructure.

2.3.1    Experiment Cube Locations on the ICF
Different voltages (5V and/or 12V) and power profiles are available for each Experiment Cube location.

           Figure 5 J01 to J08 connectors positions on the bottom of the Framework

             Figure 6 J09 to J20 connectors positions on the top of the Framework

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2.3.2     ICF Sliding Door
The Container door features a smaller sliding door (cf. Figure 1). This sliding door allows a limited access
to possible special Cubes located on top of the J09 connector of the Framework. Indeed, a class of
special Cubes may be able to host experiment cartridges (e.g. 20x40x80mm), which may require to be
replaced more frequently than the Cubes and/or while the ICE Cubes Facility remains powered.

For making use of this sliding door, please contact the ICE Cubes service.

                  Figure 7 ICF sliding door position relative to ICF connector J09

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                               ICE Cubes Facility to Experiment Cube IRD

               Figure 8 ICF sliding door size (as seen from inside the ICF Container)

2.4        “External” Experiment Cubes & Other Payloads
The requirements in this IRD have mostly been defined for “internal” Experiment Cubes. Nevertheless,
“external” Experiment Cubes or other payloads can be physically accommodated outside the ICF and
connected to the ICF via:

      •   Wi-Fi
      •   the front DB13W3S female receptacle (J21) of the Framework
      •   the auxiliary LAN connector (J22) of the Framework
      •   the USB 3.0 Type-A ports (J23 / J24) of the Framework.

For making use of any of these interfaces, please contact the ICE Cubes service.

The concept for the accommodation of wired external payloads is shown in Figure 9. The “external”
Experiment Cube could for example be attached via a bogen arm to the seat track next to the ICF.

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                                                                          Seat track

                                                                          LAN cable to/from Columbus

                                                                             “External” Experiment Cube
                                                                             (20x20x30cm shown)

“External” Experiment Cube
to ICF J21 connection cable

Figure 9 Accommodation of wired external payload (concept)

           Figure 10 Connectors on the front of the ICF

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2.4.1    ICF J21 Connector (DB13W3S)
The front DB13W3S receptacle (J21) of the Framework is almost identical in all aspects to the twenty
other DB13W3S receptacles (J01 to J20) on the Framework, as defined in req. 3.1.1 and req. 3.4. The
only difference is the fact that there is one #4-40UNC-threaded jackpost on each side of J21 (cf. Figure
10) to better secure a mated plug using two jackscrews.

2.4.2    ICF J22 Connector (RJFTV71N)
The AUX LAN connector (J22) provides a gigabit Ethernet interface to the ICF. The connector is an
Amphenol RJFTV71N receptacle with key coding A (cf. Figure 11). The pin assignment follows the
commonly used ANSI/TIA-568 standard. It can be interfaced using a typical RJ45 plug, which may (or
not) be encased in an Amphenol RJFTV6MN or RJFTV6N shell.

              Figure 11 AUX LAN J22 connector on the front of the ICF Framework

2.5      Thermal Cooling
The ICF thermal dissipation concept is based on forced air cooling provided by the hosting rack.

The warm air is sucked from two air outlets located on the rear panel of the Container, while the cold air
enters from the ten inlets on the side walls of the Container.

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Figure 12 Schematics of the forced air cooling inside the ICF Container (top view)

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3        Experiment Cube Flight Interface Requirements

3.1      Mechanical Requirements

3.1.1    Experiment Cube Connector & Feet

                     Figure 13 Shell-dimpled DB13W3P male plug (Cube side)

The Experiment Cube shall feature at least four “feet”, roughly one at each of the four corners of the –Z
face, protruding from the –Z face (cf. Figure 4). These protrusions (pf in Figure 14), as measured from
the Cube –Z surface shall be ≥3.0 mm. These feet are needed to ensure that there will not be too much
pressure on the DB13W3 connector(s) while being mated to the ICF Framework. The shape and exact
locations of the feet onto the Cube shall be coordinated with the ICE Cubes service.

The Experiment Cube shall have at least one DB13W3P (male) connector, with shell dimples, protruding
from the –Z face (cf. Figure 15). This protrusion (pc in Figure 14), as measured from the Cube –Z surface
shall be such that pc - pf = 1.0mm (±0.2mm).

Other than the aforementioned connector(s) and feet, any protrusion from the Cube –Z surface (such
as screw heads), measured as ps in Figure 14, shall be such that pf - ps ≥ 1.0mm.

When the Experiment Cube is mated to the ICF, no element from the Cube (other than the
aforementioned connector(s) and feet) shall touch the ICF Framework. In particular, Cubes larger than
1U shall have a minimum clearance of 2mm (in all directions) around the other DB13W3S connectors
(cf. Figure 5 and Figure 6), which protrude by 4.3mm from the Framework walls.

                    DB13W3P plug dimpled shell
                                                              protruding screw head (if any)            pc - pf =1.0mm

 pc
            ps                                                   ps                        pf ≥ 3.0mm

                                                                                                  Cube foot
                           Cube wall

                            Figure 14 Protrusions from the –Z Cube wall

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A mechanical interface drawing of the DB13W3P connector that is required for compatibility with the
ICF is included in Appendix B.1.

For a 1U Experiment Cube, the positioning of the connector on the Cube shall comply with Figure 15.

For positioning of the connector(s) on larger Cubes and/or Cubes requiring more than one DB13W3P
connector (cf. Figure 5 and Figure 6 for the positions of the various DB13W3S connectors on the
Framework), please coordinate with the ICE Cubes service.

    Figure 15 Proper positioning of the DB13W3P connector on a 1U Cube (dimensions in mm)

Note: In agreement with the ICE Cubes service, the coordinate system for the Experiment Cube may
be different than the one pictured in Figure 15.

3.1.2     Outer Surfaces & Protrusions
No object or element shall protrude from the external walls of the Experiment Cube, with the following
exceptions:

•    the aforementioned connector(s) and feet (see req. 3.1.1),
•    heads of eventual screws fastening the aforementioned connector (cf. Figure 14),
•    heads of eventual screws fastening the Experiment Cube walls (see also req. 3.1.6),
•    eventual fins (see req. 3.1.3).
Note: Cubes requiring a different setup need prior approval from the ICE Cubes service.

3.1.3     Fins, Vents & Fans
For Experiment Cubes requiring objects or elements which have the potential to significantly alter the
direction and/or speed of the forced air flow around the Experiment Cube (e.g. fins, vents and/or fans),
please coordinate with the ICE Cubes service for more information and approval.

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3.1.4      Standard Form Factors
The Experiment Cube can range in size from 1U to 4Ux3U, as illustrated in Figure 16.

                2Ux1.5U
                                                                                     4Ux2U

                                                  3Ux2U
             3Ux3U                    2Ux2U         2U                                           4Ux3U

                    1.5U       1U                              4U              3U

                          Figure 16 Experiment Cube standard form factors

3.1.5      Dimensions
The Experiment Cube shall have external dimensions as per one of the lines in Table 1.

                      Table 1 Experiment Cubes standard external dimensions

                  Cube Form Factor                                  Cube External Dimensions* (±4mm)
 1U                                                        100mm x 100mm x 100mm
 1.5U                                                      162.5mm x 100mm x 100mm
 2U                                                        225mm x 100mm x 100mm
 3U                                                        350mm x 100mm x 100mm
 4U                                                        475mm x 100mm x 100mm
 2U x 1.5U                                                 225mm x 162.5mm x 100mm
 2U x 2U                                                   225mm x 225mm x 100mm
 3U x 2U                                                   350mm x 225mm x 100mm
 3U x 3U                                                   350mm x 350mm x 100mm
 4U x 2U                                                   475mm x 225mm x 100mm
 4U x 3U                                                   475mm x 350mm x 100mm
* excluding small protrusions from the Cube external walls such as connector(s), feet and screw heads (cf. req.
3.1.2
Note: Cubes requiring different dimensions need prior approval from the ICE Cubes service.

The external dimensions of the Experiment Cube (and ancillary flight items, if any) shall be established
with ±5% accuracy.

The overall height of the Cube (i.e. dimension along the Z axis per Figure 15), as measured between
the DB13W3 connector(s) and any protrusion (as defined in req. 3.1.2) on the +Z face, shall be
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3.1.6      Sharp Edges
To prevent inadvertent injury to the astronauts, the external surfaces of the Experiment Cube shall not
have sharp edges, sharp corners and/or sharp protrusions.

The sharp edges verification shall make use of a cotton glove that should not be snagged as it passes
over all of the Cube surfaces (including the protruding connector, etc. per req. 3.1.2).

3.1.7      Audible Noise

3.1.7.1    Continuous Noise Limits
The total unweighted Sound Pressure Level (SPL) generated by the Experiment Cube in the noisiest
functioning conditions shall be measured at a fixed distance from the noisiest Cube surface in all octave
bands between 63Hz and 8000Hz (i.e. 63Hz, 125Hz, 250Hz, 500Hz, 1kHz, 2kHz, 4kHz and 8kHz). This
distance is 60cm for an “external” Cube, and can vary from 64cm to 102cm for an “internal” Cube, to be
coordinated with the ICE Cubes service.

For continuous noise (i.e. more than 8 hours per 24-hour period), the limit levels defined in Table 2 shall
not be exceeded in any octave band.

                                      Table 2 Continuous noise limits

          Frequency            63Hz      125Hz       250Hz       500Hz       1kHz       2kHz      4kHz     8kHz
  Limit (“internal”, TBC)     60dBL       50dBL      39dBL       35dBL      34dBL       32dBL     33dBL    35dBL
 Limit (“external”, TBC)      64dBL       56dBL      50dBL       45dBL      41dBL       39dBL     38dBL    37dBL

Note: If the noise generated by the Experiment Cube is lower than 31dBA (A-weighted dB) when
measured at 64cm (60cm for an “external” Cube) from the noisiest Cube surface in the noisiest
functioning conditions, the above-specified measurement is in principle not required. Please contact the
ICE Cubes service for details.

3.1.7.2    Intermittent Noise Limits
In case of intermittent noise generated by the Experiment Cube, i.e. less than 8 hours per 24-hour
period, the acceptable noise limits can be higher than the values defined in Table 2 and they shall be
agreed with the ICE Cubes service.

3.1.7.3    Audible Noise Limits Verification
The requirements of audible noise produced by the Experiment Cube can be verified by:

    •     Analysis based on the datasheets of the commercial parts, if available, and/or
    •     Test

The test setup and procedure (including success criteria) shall be agreed between the ICE Cubes
service and the customer.

3.1.8      Microgravity Disturbances
Microgravity disturbances generated by the Experiment Cube at the level of the mechanical interface
with the ICF shall be limited.

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                                  ICE Cubes Facility to Experiment Cube IRD

Based on preliminary indications from §3.1.2 of SSP 50835 [RD4], the Experiment Cube shall not
generate vibratory accelerations:

      •   ≥ 0.001 µg in the frequency range 0.01 < f ≤ 0.1 Hz, and
      •   ≥ 0.01 x f µg in the frequency range 0.1 < f ≤ 100 Hz, and
      •   ≥ 1 µg for frequencies f ≥ 100 Hz.

The test setup and procedure (including success criteria) shall be agreed between the ICE Cubes
service and the customer.

Note: This requirement is mostly relevant for Cubes containing moving parts (pumps, fans, motors,
valves), which are prone to generating perceptible vibrations, including acoustic vibrations.

3.1.9       Mass and Centre of Gravity (CoG)
The mass (launch configuration) and CoG (in-orbit configuration) of the Experiment Cube (and ancillary
flight items, if any) shall be established with accuracies of ±5% and ±10%, respectively.

Note: The typical Experiment Cube coordinate system is pictured in Figure 15.

3.2         Structural & Environmental Interface Requirements

3.2.1       Environmental Conditions

3.2.1.1     Temperature, Pressure & Humidity Conditions
To guarantee mission success (reliability-related, see req. 3.10), the Experiment Cube shall be able to
withstand the ISS, HTV, Progress, Soyuz, Dragon, and Cygnus humidity, temperature and atmospheric
pressure requirements as summarized here below (from COL-RIBRE-SPE-0164 [RD3] and SSP 50835
[RD4]).

                                      Table 3 Environmental conditions

                                  Temperature (°C)                Pressure (mbar)             Maximum Relative
                                                                                                Humidity (%)
           Storage                     +5 to +46                     896 to 1103                     85
          Transport                    0 to +50*                     896 to 1103                     90
   Accommodation into                   0 to +50                     600 to 1293                     85
        launcher
        Launch / Ascent                0 to +50**                     0 to 1293               90 (100 depressed)
  On Orbit (on board the               +5 to +45                      0 to 1048               70 (100 depressed)
   ISS) non operational
      Descent / Landing                0 to +40**                     0 to 1293               90 (100 depressed)
  After Landing in Soyuz               -50 to +50                   atmospheric                      98
* In the event of a winter launch in Progress or Soyuz, the temperature range requirement during transportation by
train to the launch site is actually -50°C to +50°C. However, this temperature range can be narrowed to 0°C to
+50°C by shipping the hardware items to the launch site in such a way that no transportation in an uncontrolled
temperature environment takes place (as it has been done in the past for other projects). Therefore, it is considered
appropriate to verify compliance of the Experiment Cube design against the 0°C to +50°C range.
** In the event of a launch and/or return in Dragon, the temperature ranges can be narrowed to +18.3°C to +30°C.

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                                   ICE Cubes Facility to Experiment Cube IRD

For Experiment Cubes with special temperature and/or humidity control requirements (on board, during
launch, and/or return to ground), please coordinate with the ICE Cubes service as early as possible.

3.2.1.2    Depressurization/Re-Pressurization Conditions
The Experiment Cube shall be compatible with the following:

    •     The maximum depressurization/re-pressurization rates during transport (ascent/descent) of
          13.3 kPa/s and 798 Pa/s, respectively.
    •     The depressurization/re-pressurization rates on board the ISS of 878 Pa/s (for at least 2 min,
          starting at ambient pressure), and 230 Pa/s (for at least 3 min, starting at p = 100 Pa).
    •     The pressure gradient that may occur due to fire suppression in the rack where the ICF is
          hosted, with a peak pressurization rate of 20 kPa/s (for less than 0.1 second in the case of
          manual fire suppression).

Note: To guarantee that no significant mechanical stress is applied on enclosed (not intentionally sealed)
structures during depressurization or re-pressurization, vents in each enclosure should be implemented
such that the Maximum Effective Vent Ratio (MEVR) = internal volume (cm³) / effective vent area (cm²)
≤ 5080 cm. Enclosures verifying this criterion do not require any depressurization/re-pressurization test
nor structural analysis.

3.2.1.3    Thermal Environment inside the ICE Cubes Facility
The cooling of the Experiment Cube is obtained via forced air ventilation inside the ICF.

The temperature of the cooled air flow entering the ICF Container can range between 17°C and 30°C
(hosting rack design values). Measurements performed in the past range between 20°C and 25°C.

Approximate temperature of the air surrounding the Experiment Cube, if requested, can be offered by
proper location of the Cube itself in the ICF.

If needed for mission success (reliability-related, see req. 3.10), fine temperature control shall be
implemented by the customer at Cube level, e.g. by introducing heaters, fins, vents, fans (see req. 3.1.3)
or Peltier coolers, as necessary.

3.2.2      Launch & Landing Loads
The Experiment Cube safety-critical and interface-critical structures shall provide positive margins of
safety when exposed to the accelerations documented in Table 4 at the centre of gravity of the Cube
soft stowed in bags (soft packaging in principle provided by the ICE Cubes service), with all six degrees
of freedom acting simultaneously.

                          Table 4 Launch and landing load factors envelope

                    Nx (g)             Ny (g)            Nz (g)         Rx (rad/s²)       Ry (rad/s²)      Rz (rad/s²)
 Launch              +/-7.4             +/-7.4           +/-7.4           +/-13.5              +/-13.5       +/-13.5
 Landing            +/-10.0            +/-10.0           +/-10.0            N/A                 N/A           N/A

Safety-critical and interface-critical structures within an Experiment Cube will be identified by the ICE
Cubes service, based on the peculiarities of the Experiment Cube.

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