A Virtual Space System supporting Ground Validation Nuno Sebastião (OPS-GIC), Mauro Pecchioli (OPS-GIC)
Outline of this Presentation <ul><li>The way we got here </li></ul><ul><ul><li>The need for a Ground Systems Validation In...
<ul><li>The way we got here </li></ul>OPS-G Forum 07 November 2008 Slide
Motivation <ul><li>Current Situation </li></ul><ul><li>Testing of ground systems relies on multiple tools </li></ul><ul><l...
The Process <ul><li>Identify use cases, building upon the concepts introduced with PSS MkIII </li></ul><ul><li>Define test...
GSTVi Objectives <ul><li>One tool supporting the full cycle of ground systems technical validation </li></ul><ul><li>Isola...
GSTVi Definition Process OPS-G Forum 07 November 2008 Slide
Use Case Analysis <ul><li>14 Use Cases were selected to drive specification and design of GSTVi </li></ul><ul><li>Use Case...
Use Case / Assembly Coverage OPS-G Forum 07 November 2008 Slide  MCS Component Test NIS Component Test TMTCS Component Tes...
Development Approach <ul><li>SIMSAT 4 based (Linux SLES 9 64 bits) </li></ul><ul><li>Developed using the SMP2 Standard </l...
GSTVi Overview OPS-G Forum 07 November 2008 Slide
SIMULATION Infrastructure OPS-G Forum 07 November 2008 Slide  Unified Modelling  Framework (UMF) Simsat Runtime Space Mode...
OPS-G Forum 07 November 2008 Slide  MCS NIS TMTCS IFMS/TCDS EGSE/FEE Spacecraft TM/TC Spacecraft Model MCS Model NIS Model...
GSTVi Concepts OPS-G Forum 07 November 2008 Slide  TTSCM TTC Streams GEM NISM MCSM TM/TC Spacecraft Model Space Link Model...
GSTVi Concepts OPS-G Forum 07 November 2008 Slide  TTSCM TTC streams GEM NISM MCSM TM/TC Spacecraft Model Space Link Model...
GSTVi Concepts OPS-G Forum 07 November 2008 Slide  TTSCM TTC Streams GEM NISM MCSM TM/TC Spacecraft Model Space Link Model...
GSTVi Concepts OPS-G Forum 07 November 2008 Slide  TTSCM TTC Streams GEM NISM MCSM TM/TC Spacecraft Model Space Link Model...
GSTVi Concepts OPS-G Forum 07 November 2008 Slide  TTSCM TTC Streams GEM NISM MCSM TM/TC Spacecraft Model Space Link Model...
GSTVi Concepts OPS-G Forum 07 November 2008 Slide  TTSCM TTC Streams GEM NISM MCSM TM/TC Spacecraft Model Space Link Model...
GSTVi Concepts OPS-G Forum 07 November 2008 Slide  TTSCM TTC Streams GEM NISM MCSM TM/TC Spacecraft Model Space Link Model...
GSTVi Concepts OPS-G Forum 07 November 2008 Slide  TTSCM TTC Streams GEM NISM MCSM TM/TC Spacecraft Model Space Link Model...
Brief Component Description <ul><li>TM/TC S/C Model </li></ul><ul><ul><li>Simulates the on-board processing of TM/TC data....
Brief Component Description <ul><li>Spacecraft Specific Model Extension (SSME) </li></ul><ul><ul><li>Extension mechanism a...
Brief Component Description <ul><li>MCS Direct Interface (DIF) </li></ul><ul><ul><li>MCS Direct interface to a S/C Model v...
Brief Component Description <ul><li>MCS Model </li></ul><ul><li>It provides a basic model of a SCOS-2000-based Mission Con...
GSTVi OPS-G Forum 07 November 2008 Slide  Operational Usage
Who are the costumers? <ul><li>Mission Data Systems (OPS-GD/FCT) </li></ul><ul><li>Ground Stations (OPS-GF, OPS-ON) </li><...
Configuration process OPS-G Forum 07 November 2008 Slide  GSTVi  Configuration  Data SCOS 2000 MIB RF Characteristics SICF...
Who Supplies the configuration Data? OPS-G Forum 07 November 2008 Slide  Item  Supplier Mission SCOS 2000 MIB Mission FCT ...
How do we configure GSTVi? OPS-G Forum 07 November 2008 Slide  Infrastructure (OPS-GI) Ground Station (OPS-GS/ON) Mission ...
GSTVi OPS-G Forum 07 November 2008 Slide  Demo
GSTVi Demo <ul><li>Mission Configuration Editor Demo (Both integrated and in a standalone browser). </li></ul><ul><li>A Si...
GSTVi OPS-G Forum 07 November 2008 Slide  Schedule
GSTVi Delivery Schedule <ul><li>PA Delivery -> Nov. 2008 </li></ul><ul><li>FA Delivery -> March. 2009 </li></ul><ul><li>EO...
GSTVi <ul><li>Summary </li></ul>OPS-G Forum 07 November 2008 Slide  Summary
The Way Forward <ul><li>Start with GSTVi for data systems development and testing </li></ul><ul><ul><li>Consequence: Sim d...
Conclusions <ul><li>GSTVi:  </li></ul><ul><ul><li>Supports the technical validation of data systems involved in TM/TC data...
Thank you for your attention ! Let’s build the future <ul><li>Let’s continue to build the future </li></ul>OPS-G Forum 07 ...
Backups OPS-G Forum 07 November 2008 Slide
Assembly A - MCS Isolated Testing (replayed TM) OPS-G Forum 07 November 2008 Slide  This assembly allows testing the Missi...
Assembly B – MCS Isolated Testing (Simulated and replayed TM) OPS-G Forum 07 November 2008 Slide  This assembly allows tes...
Assembly C – MCS Isolated Testing (Simulated and replayed TM – 2 sources) OPS-G Forum 07 November 2008 Slide  This assembl...
Assembly E – TMTCS Isolated Testing OPS-G Forum 07 November 2008 Slide  This assembly allows testing the TMTCS in complete...
Assembly F – G/S Stand-Alone Testing OPS-G Forum 07 November 2008 Slide  This assembly allows testing the IFMS, TCDS and T...
Assembly H – NIS Connectivity Testing OPS-G Forum 07 November 2008 Slide  This assembly allows testing the NIS and the con...
Assembly I – PSS OPS-G Forum 07 November 2008 Slide  This assembly allows testing the TM/TC path through the full integrat...
Assembly K – Long Loop Operational Simulation OPS-G Forum 07 November 2008 Slide  This assembly allows testing the full se...
Assembly M – NDIU Ultra-Light OPS-G Forum 07 November 2008 Slide  This assembly allows running system validation tests (SV...
Assembly N – Operational Spacecraft Simulator Testing OPS-G Forum 07 November 2008 Slide  This assembly allows testing the...
Assembly Z – GSTVi Isolated Testing OPS-G Forum 07 November 2008 Slide  This assembly is a specific test configuration use...
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OPS Forum virtual space system 07.11.2008

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GSTVi is a generic simulator of a representative space system for ESA missions. It covers both the space segment as well as the ground segment for all aspects related to TM/TC routing and processing.


The main purpose of GSTVi is to support the technical validation of all ground data systems throughout their lifecycle, starting from systems isolated during testing up to their integration and operations within a mission ground segment.

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  • Identify use cases that shall drive GSTVi specification and design Define GSTVi configurations that can support these use cases and derive the requirements on the GSTVi system and GSTVi components Analyse the needs for development and evolution of mission test beds to support the use cases Analyse usage scenarios, including Configuration scenarios Installation scenarios Operation scenarios Analyse configuration control requirements
  • Harmonise configuration and operation across different tools to reduce effort required for Test specification Tool configuration Training and familiarisation
  • On the telemetry side, it forwards TM frames received from the S/C Model via TTC STREAMS to TMTCS. It simulates the ground station visibility, as well as TM/TC link failures. The TMTCS TIF is an element of the GSTVi configuration assembly supporting the testing of TMTCS in isolation, or any chain of ground systems involving TMTCS and OCC components.
  • It is sufficient to support the testing of the G/S equipment, with the exception of the testing of the SLE FSP service, for which packet-level simulation is required. The parameters are extracted from the TM packets, and the evolution of their values is used to drive the TC generation. Only raw values of the TM parameters are modelled, and the MCS Model can implement a basic out-of-limit checking on raw TM parameter values. At this level of simulation, the monitoring of the model is supported by alpha-numeric displays similar to the traditional SCOS-2000 AND’s. On the telecommanding side, the Model provides a manual stack with limited functionality, allowing the release of telecommands read from stacks or created on the fly. Frame-level simulation is based on the direct generation of TC frames from bit patterns, and processing of TM frames based on bit pattern matching only. The packet-level simulation is based on the generation of TC packets from bit patterns, and their assembly into frames and CLTU’s, and the extraction of TM packets from TM frames, with TM processing based on bit pattern matching on the extracted packets. The parameter-level simulation is based on the simulation of a subset of TM parameters in the MCS Model.
  • OPS Forum virtual space system 07.11.2008

    1. 1. A Virtual Space System supporting Ground Validation Nuno Sebastião (OPS-GIC), Mauro Pecchioli (OPS-GIC)
    2. 2. Outline of this Presentation <ul><li>The way we got here </li></ul><ul><ul><li>The need for a Ground Systems Validation Infrastructure </li></ul></ul><ul><li>Ground Systems Verification and Validation </li></ul><ul><ul><li>Concepts </li></ul></ul><ul><ul><li>Use cases </li></ul></ul><ul><ul><li>Current Status </li></ul></ul><ul><li>Operational Usage </li></ul><ul><ul><li>Integration with Operational Simulator Development </li></ul></ul><ul><li>Demo </li></ul><ul><li>Schedule </li></ul><ul><li>Summary </li></ul>OPS-G Forum 07 November 2008 Slide
    3. 3. <ul><li>The way we got here </li></ul>OPS-G Forum 07 November 2008 Slide
    4. 4. Motivation <ul><li>Current Situation </li></ul><ul><li>Testing of ground systems relies on multiple tools </li></ul><ul><li>Many tools are specific for the system under test. </li></ul><ul><li>Tools are often targeted at a specific validation phase or test scenario </li></ul><ul><li>Each tool has its specific user interface and configuration data </li></ul><ul><li>The same functionality is implemented by different tools in different ways </li></ul><ul><li>The operational simulator is used for ground systems integration testing </li></ul><ul><li>Implications </li></ul><ul><li>Testers must familiarise with different testing approaches and interfaces </li></ul><ul><li>Configuration and test data must be developed and maintained multiple times </li></ul><ul><li>Re-use of tests and data in different phases and for different systems is difficult </li></ul><ul><li>Operational simulator is not mature enough at the time when it is required for systems testing </li></ul>OPS-G Forum 07 November 2008 Slide As many tests require generic TM/TC simulation capabilities, improvement is possible
    5. 5. The Process <ul><li>Identify use cases, building upon the concepts introduced with PSS MkIII </li></ul><ul><li>Define test configurations that can support these use cases </li></ul><ul><li>Derive the requirements on a generic simulator and its components to support these test scenarios (GSTVi system) </li></ul>OPS-G Forum 07 November 2008 Slide
    6. 6. GSTVi Objectives <ul><li>One tool supporting the full cycle of ground systems technical validation </li></ul><ul><li>Isolated System Technical Validation </li></ul><ul><li>End to end Test Environment </li></ul><ul><li>Reduce effort to set-up test campaigns </li></ul><ul><li>Enable ‘delayed’ development of operational simulators </li></ul><ul><li>Augmented systems quality </li></ul><ul><li>Automated Verification of Systems Under Test using Automated Regression Testing (ART) Framework </li></ul>OPS-G Forum 07 November 2008 Slide
    7. 7. GSTVi Definition Process OPS-G Forum 07 November 2008 Slide
    8. 8. Use Case Analysis <ul><li>14 Use Cases were selected to drive specification and design of GSTVi </li></ul><ul><li>Use Case Specification: </li></ul><ul><ul><li>Objective </li></ul></ul><ul><ul><li>Systems and components under test </li></ul></ul><ul><ul><li>Functionality to be tested </li></ul></ul><ul><ul><li>External systems involved </li></ul></ul><ul><ul><li>Interfaces to be supported </li></ul></ul><ul><li>Assemblies of GSTVi Components that can support these Use cases were defined </li></ul>OPS-G Forum 07 November 2008 Slide GSTVi Ground Station Components Station M&C IFMS TCDS TMTCS Example – Ground Station Stand-alone Test TM TC
    9. 9. Use Case / Assembly Coverage OPS-G Forum 07 November 2008 Slide MCS Component Test NIS Component Test TMTCS Component Test IFMS/TCDS Component Test Mission Simulator Component Test EGSE Component Test NIS Connectivity Test TM/TC End-to-End Test Simulation Campaign Long Loop Mission Readiness Test (MRT) Ground Station Stand-alone Test Pre-pass Data Flow Test MCS Isolated Testing NIS Isolated Testing TMTCS Isolated Testing Ground Station Stand-alone Testing Simulator Stand-alone Testing NIS Connectivity Testing Portable Satellite Simulator (PSS) Long Loop Operational Simulation ASSEMBLIES USE CASE Operational Simulation Support of SVT´s NDIU Lite Test Assembly
    10. 10. Development Approach <ul><li>SIMSAT 4 based (Linux SLES 9 64 bits) </li></ul><ul><li>Developed using the SMP2 Standard </li></ul><ul><li>Extends SIMSAT 4 MMI with GSTVi specific Views </li></ul><ul><li>Many GSTVi components have been derived from existing software and only a few are new developments </li></ul><ul><li>GSTVi R1 use existing, proven ground models </li></ul>OPS-G Forum 07 November 2008 Slide
    11. 11. GSTVi Overview OPS-G Forum 07 November 2008 Slide
    12. 12. SIMULATION Infrastructure OPS-G Forum 07 November 2008 Slide Unified Modelling Framework (UMF) Simsat Runtime Space Models (Generic Models, Emulators, Specific Models) Simulator Reference Architecture Ground Models (Station back-end, Control Center) GSTVi Multi-purpose Operational Simulator Simulus Tevalis UMF
    13. 13. OPS-G Forum 07 November 2008 Slide MCS NIS TMTCS IFMS/TCDS EGSE/FEE Spacecraft TM/TC Spacecraft Model MCS Model NIS Model TIF EGSE / FEE I/F Ground System under Test GSTVi Component Space/Ground I/F SGM (SLE Model) MCS DIF IMBU (H/W) IMBU I/F AIV System Real Systems Simulated Systems The big picture Ground Segment Test and Validation Infrastructure
    14. 14. GSTVi Concepts OPS-G Forum 07 November 2008 Slide TTSCM TTC Streams GEM NISM MCSM TM/TC Spacecraft Model Space Link Model Ground Equipment Model Network Interface Model Mission Control System Model
    15. 15. GSTVi Concepts OPS-G Forum 07 November 2008 Slide TTSCM TTC streams GEM NISM MCSM TM/TC Spacecraft Model Space Link Model Ground Equipment Model Network Interface Model Mission Control System Model NIS
    16. 16. GSTVi Concepts OPS-G Forum 07 November 2008 Slide TTSCM TTC Streams GEM NISM MCSM TM/TC Spacecraft Model Space Link Model Ground Equipment Model Network Interface Model Mission Control System Model MCS
    17. 17. GSTVi Concepts OPS-G Forum 07 November 2008 Slide TTSCM TTC Streams GEM NISM MCSM TM/TC Spacecraft Model Space Link Model Ground Equipment Model Network Interface Model Mission Control System Model MCS MCSDIF
    18. 18. GSTVi Concepts OPS-G Forum 07 November 2008 Slide TTSCM TTC Streams GEM NISM MCSM TM/TC Spacecraft Model Space Link Model Ground Equipment Model Network Interface Model Mission Control System Model TMTCS Baseband Processing TM Channel Decoding IF & Modem Subsystem IMBU IMBU I/F MCSDIF TCDS IFMS
    19. 19. GSTVi Concepts OPS-G Forum 07 November 2008 Slide TTSCM TTC Streams GEM NISM MCSM TM/TC Spacecraft Model Space Link Model Ground Equipment Model Network Interface Model Mission Control System Model TMTCS Baseband Processing IMBU I/F TIF MCSDIF
    20. 20. GSTVi Concepts OPS-G Forum 07 November 2008 Slide TTSCM TTC Streams GEM NISM MCSM TM/TC Spacecraft Model Space Link Model Ground Equipment Model Network Interface Model Mission Control System Model MISSION SIMULATOR IMBU I/F TIF MCSDIF
    21. 21. GSTVi Concepts OPS-G Forum 07 November 2008 Slide TTSCM TTC Streams GEM NISM MCSM TM/TC Spacecraft Model Space Link Model Ground Equipment Model Network Interface Model Mission Control System Model IMBU I/F TIF MCSDIF Configuration Database SCOS 2000 MIB
    22. 22. Brief Component Description <ul><li>TM/TC S/C Model </li></ul><ul><ul><li>Simulates the on-board processing of TM/TC data. </li></ul></ul><ul><ul><li>The level of simulation expected from the Model, frame, packet, or parameter level, is configurable by the user. </li></ul></ul><ul><li>Supports the simulation of a limited number of PUS services, including amongst others: </li></ul><ul><ul><li>command verification, </li></ul></ul><ul><ul><li>House Keeping telemetry generation, and </li></ul></ul><ul><ul><li>Time Reporting. </li></ul></ul><ul><li>The spacecraft behaviour simulation is supported by a mechanism that allows triggering of an action on receipt of telecommands that match given templates. Actions can be: </li></ul><ul><ul><li>Modification of a telemetry parameter value within the model, </li></ul></ul><ul><ul><li>the execution of a script, </li></ul></ul><ul><ul><li>and/or the generation of telemetry packets. </li></ul></ul>OPS-G Forum 07 November 2008 Slide S/C Models
    23. 23. Brief Component Description <ul><li>Spacecraft Specific Model Extension (SSME) </li></ul><ul><ul><li>Extension mechanism allowing for the increase in the accuracy of the spacecraft simulation by actual simulation of the spacecraft equipments. </li></ul></ul><ul><ul><li>In order to support the development of a SSME by the user, the GSTVi provides a development environment for the model extensions, which relies on the simulation toolkit provided in the underlying simulation environment. </li></ul></ul>OPS-G Forum 07 November 2008 Slide S/C Models
    24. 24. Brief Component Description <ul><li>MCS Direct Interface (DIF) </li></ul><ul><ul><li>MCS Direct interface to a S/C Model via the TTC STREAMS communication mechanism. </li></ul></ul><ul><ul><li>It provides the same interface as the NIS, and acts as an interface to a telemetry source and telecommand sink. </li></ul></ul><ul><ul><li>It provides command uplink verification simulation, and supports the injection of various transmission failures. </li></ul></ul><ul><li>TMTCS Interface (TIF) </li></ul><ul><ul><li>Directly interfaces TMTCS to the S/C Model. </li></ul></ul><ul><ul><li>The component receives CLTU’s from TMTCS through an IFMS interface, and transmits TC transfer frames to the S/C Model via TTC STREAMS. </li></ul></ul><ul><li>TMTCS SLE Ground Model (SGM) </li></ul><ul><ul><li>This component supports the testing of the OCC components. It provides an interface between a NIS and the S/C Model. </li></ul></ul><ul><ul><li>It simulates the functional behaviour of the TMTCS related to: </li></ul></ul><ul><ul><ul><li>the processing of TM/TC data, including the simulation of SLE services from the provider side, </li></ul></ul></ul><ul><ul><ul><li>the TMTCS files management, and the </li></ul></ul></ul><ul><ul><ul><li>exchange of monitoring and control data according to the standard M&C I/F used by STC. </li></ul></ul></ul>OPS-G Forum 07 November 2008 Slide Ground Models
    25. 25. Brief Component Description <ul><li>MCS Model </li></ul><ul><li>It provides a basic model of a SCOS-2000-based Mission Control System, easy to configure, that can be used as a source of telecommand and a sink for telemetry. </li></ul><ul><li>The MCS Model supports three levels of simulation: frame-level simulation, packet-level simulation, and parameter-level simulation. </li></ul><ul><li>NIS Model </li></ul><ul><li>This component simulates the functional behaviour of the NIS related to the processing of TM/TC data, including the simulation of a SLE user. </li></ul><ul><li>On the OCC components side, it provides to a MCS an interface for telecommand transmission and telemetry and administrative messages reception. </li></ul><ul><li>On the Ground Model side, it provides an interface to TMTCS for transmission of telemetry and reception of telecommand. </li></ul>OPS-G Forum 07 November 2008 Slide OCC Models
    26. 26. GSTVi OPS-G Forum 07 November 2008 Slide Operational Usage
    27. 27. Who are the costumers? <ul><li>Mission Data Systems (OPS-GD/FCT) </li></ul><ul><li>Ground Stations (OPS-GF, OPS-ON) </li></ul><ul><li>Infrastructure (OPS-GI) </li></ul>OPS-G Forum 07 November 2008 Slide
    28. 28. Configuration process OPS-G Forum 07 November 2008 Slide GSTVi Configuration Data SCOS 2000 MIB RF Characteristics SICF Files
    29. 29. Who Supplies the configuration Data? OPS-G Forum 07 November 2008 Slide Item Supplier Mission SCOS 2000 MIB Mission FCT (OPS-GD) RF Characteristics OPS-ONV, OPS-ONF SICF Files OPS-ONV
    30. 30. How do we configure GSTVi? OPS-G Forum 07 November 2008 Slide Infrastructure (OPS-GI) Ground Station (OPS-GS/ON) Mission Data Systems (OPS-GD + FCT) Includes On-site support
    31. 31. GSTVi OPS-G Forum 07 November 2008 Slide Demo
    32. 32. GSTVi Demo <ul><li>Mission Configuration Editor Demo (Both integrated and in a standalone browser). </li></ul><ul><li>A Simsat foundation (Simsat Runtime Perspective) </li></ul><ul><li>GSTVi Perspectives (S/C Model, SGM, NIS, MCS) </li></ul><ul><li>Start MCS Model Processing (Show MCS Perspective) </li></ul><ul><li>Load some commands in the Manual Stack and dispatch them </li></ul><ul><li>Observe the TC reception on board the S/C (Frames received increased) </li></ul><ul><li>Switch back to Command Verification View in MCS and verify that commands were successfully received on board the S/C (Stage 3 verification report). </li></ul><ul><li>Show TM flowing out through the chain (S/C Model, SGM, NIS, SCOS). </li></ul>OPS-G Forum 07 November 2008 Slide
    33. 33. GSTVi OPS-G Forum 07 November 2008 Slide Schedule
    34. 34. GSTVi Delivery Schedule <ul><li>PA Delivery -> Nov. 2008 </li></ul><ul><li>FA Delivery -> March. 2009 </li></ul><ul><li>EOW Delivery ->Oct. 2009 </li></ul>OPS-G Forum 07 November 2008 Slide
    35. 35. GSTVi <ul><li>Summary </li></ul>OPS-G Forum 07 November 2008 Slide Summary
    36. 36. The Way Forward <ul><li>Start with GSTVi for data systems development and testing </li></ul><ul><ul><li>Consequence: Sim development can start later. </li></ul></ul><ul><li>Replace GSTVi TM/TC model with a mission specific high-fidelity simulator (using GETS in D1 to avoid immaturity of OBSW) </li></ul><ul><li>Shorter development cycles through reuse of models and reference architecture. </li></ul>OPS-G Forum 07 November 2008 Slide
    37. 37. Conclusions <ul><li>GSTVi: </li></ul><ul><ul><li>Supports the technical validation of data systems involved in TM/TC data exchange </li></ul></ul><ul><ul><li>Supports the full cycle of validation campaigns, from isolated testing up to end-to-end ground segment tests </li></ul></ul><ul><ul><li>Builds upon the concepts introduced with PSS MkIII and the operational experience gained with it </li></ul></ul><ul><ul><li>It relies on the general simulators infrastructure (SIMSAT, SMP2, Ground Models) </li></ul></ul><ul><ul><li>It supports the operational simulator development lifecycle </li></ul></ul><ul><ul><li>It provides a comfortable environment to execute tests manually and automatically. </li></ul></ul>OPS-G Forum 07 November 2008 Slide
    38. 38. Thank you for your attention ! Let’s build the future <ul><li>Let’s continue to build the future </li></ul>OPS-G Forum 07 November 2008 Slide
    39. 39. Backups OPS-G Forum 07 November 2008 Slide
    40. 40. Assembly A - MCS Isolated Testing (replayed TM) OPS-G Forum 07 November 2008 Slide This assembly allows testing the Mission Control System using the MCS DIF ground model. The MCS DIF replays telemetry frames read from a file and sends these frames to the MCS. The MCS DIF uses the services of the TM/TC data recorder and replayer (DRR) for reading the telemetry files.
    41. 41. Assembly B – MCS Isolated Testing (Simulated and replayed TM) OPS-G Forum 07 November 2008 Slide This assembly allows testing the Mission Control System using the MCS DIF ground model. The telemetry can be real-time simulated telemetry generated by the SCM and SSME GSTVi models, or can be telemetry read from a file via the TM/TC data recorder and replayer (DRR).
    42. 42. Assembly C – MCS Isolated Testing (Simulated and replayed TM – 2 sources) OPS-G Forum 07 November 2008 Slide This assembly allows testing the Mission Control System using the MCS DIF ground model. The telemetry can be real-time simulated telemetry generated by the SCM and SSME GSTVi models, or can be telemetry read from a file via the TM/TC data recorder and replayer (DRR). The telemetry can be read from a file by the MCS DIF or by the SCM.
    43. 43. Assembly E – TMTCS Isolated Testing OPS-G Forum 07 November 2008 Slide This assembly allows testing the TMTCS in complete isolation from the rest of the ground segment using the TMTCS Interface (TIF) ground model to interface to the spacecraft, and the NIS and MCS model to simulate the mission control system. On the spacecraft side, the telemetry can be telemetry generated in real-time by the SCM and SSME GSTVi models, or can be telemetry read from a file via the TM/TC data recorder and replayer (DRR).
    44. 44. Assembly F – G/S Stand-Alone Testing OPS-G Forum 07 November 2008 Slide This assembly allows testing the IFMS, TCDS and TMTCS ground station equipment in isolation from the rest of the ground segment. The IFMS/TCDS interfaces to the GSTVi IMBU hardware unit at baseband/IF level for exchange of telemetry and telecommand data. The TMTCS interfaces to the NIS and MCS models which simulate the mission control system. On the spacecraft side, the telemetry can be telemetry generated in real-time by the SCM and SSME GSTVi models, or can be telemetry read from a file via the TM/TC data recorder and replayer (DRR).
    45. 45. Assembly H – NIS Connectivity Testing OPS-G Forum 07 November 2008 Slide This assembly allows testing the NIS and the connectivity between the NIS and the TMTCS located at the ground station and between the NIS and the mission control system. The NIS interfaces to the MCS model which simulates the mission control system. On the spacecraft side, the telemetry can be telemetry generated in real-time by the SCM and SSME GSTVi models, or can be telemetry read from a file via the TM/TC data recorder and replayer (DRR).
    46. 46. Assembly I – PSS OPS-G Forum 07 November 2008 Slide This assembly allows testing the TM/TC path through the full integrated ground segment and running data flow tests from the station front-end down to the MCS. The IFMS/TCDS interfaces to the spacecraft simulator via the IMBU and the IMBU I/F model. On the spacecraft side, the telemetry can be telemetry generated in real-time by the SCM and SSME GSTVi models, or can be telemetry read from a file via the TM/TC data recorder and replayer (DRR).
    47. 47. Assembly K – Long Loop Operational Simulation OPS-G Forum 07 November 2008 Slide This assembly allows testing the full set of ground data systems, including the actual G/S components sitting at the ground station and the OCC in realistic operational scenarios involving the operational spacecraft simulator. In this assembly, the GSTVi is only used to relay the telemetry and telecommand data. The IFMS/TCDS interfaces to the operational simulator via the IMBU, the IMBU I/F model and the SLE ground model (SGM). The SCM is only used for updating telemetry frame counters and generating idle frames when needed.
    48. 48. Assembly M – NDIU Ultra-Light OPS-G Forum 07 November 2008 Slide This assembly allows running system validation tests (SVT) in order to test the OCC components of the ground segment using the S/C interfacing to GSTVi via the FEE. This assembly also allows using the simulated spacecraft (SCM) in order to run data flow tests prior to the System Validation Tests. Switching the telemetry and telecommand flow from the simulated spacecraft (SCM) to the S/C via the FEE and the EGSE/FEE interface and vice-versa is possible at real time.
    49. 49. Assembly N – Operational Spacecraft Simulator Testing OPS-G Forum 07 November 2008 Slide This assembly allows testing the operational spacecraft model part of the operational simulator. The operational spacecraft model does not interface to the mission control centre via the SLE ground model and the NIS, but via the MCSDIF model. The GSTVi MCS model simulates the mission control centre.
    50. 50. Assembly Z – GSTVi Isolated Testing OPS-G Forum 07 November 2008 Slide This assembly is a specific test configuration used to test the Mission Configuration Database (MCDB) and the correct installation of GSTVi and MCDB on the target workstation. This assembly is not meant to be used for testing of the ground segment since it only uses simulation components. The TM/TC data recorder may be used by both by the MCS model and SCM to record the data sent and received by these models for further inspection and checking.

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