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Technical & Logistical Challenges of ISS Operations from a Canadian Perspective Chris Lorenz Special Assistant to the President CSA Presentation Overview Introduction Challenges encountered since Columbia Tragedy Planning for missions – a moving target!

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Technical & Logistical Challenges of ISS Operations from a Canadian Perspective

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Technical & Logistical Challenges of ISS Operations from aCanadian Perspective

Chris Lorenz

Special Assistant to the President

CSA


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Presentation Overview

  • Introduction

  • Challenges encountered since Columbia Tragedy

  • Planning for missions – a moving target!

  • Tracking system trends with a flexible duty cycle

  • Looking ahead

  • Conclusion


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Challenges since Columbia

  • Due to the Columbia tragedy, the ISS Program has had to make significant adjustments to its plans and schedules.

  • The ISS crew complement has been reduced to two (2) crewmembers to stretch consumable resources while preserving operational viability.


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The MSS has not performed any assembly operations since the Columbia accident. It has primarily performed vehicle viewing operations.


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Planning – A Moving Target

  • Due to the changing assembly sequence, the robotics support provided by the MSS is in continuous flux to accommodate the changing mission(s).

  • While changes in mission plans are not unusual, the scope and number of changes are having a significant impact on CSA.


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Planning – A Moving Target

  • Assembly requirements take precedence over any other requirements, pushing manifest items that are not assembly-related down the priority list.

  • This has a direct impact on planning science and/or maintenance activities, as the "target" keeps moving.


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Systems Trends

  • Planning for MSS maintenance has also become more difficult, due primarily to significant changes in MSS duty cycle since launch.

  • Accurate trend data is vital in ensuring that plans for maintenance and sparing can be accurately made. Flexibility remains key to ensuring operational capabilities.


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Systems Trends

  • Due to the changes in the assembly sequence, it is likely that ISS maintenance operations will be different than first projections.

  • Those changes will have a direct impact on the planning of operations and maintenance of Dextre, Canada's special purpose robot.


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Looking Ahead

  • Planning efforts are now focused on the first assembly missions, with an emphasis on accomplishing the tasks required to get the program moving.

  • A new assembly sequence will allow for relative stability in the medium and long-term (robotic) planning processes. Short-term planning will remain dynamic.


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Conclusion

  • The past fifteen (15) months have been very challenging for the ISS Program.

  • The strength of the ISS partnership has been demonstrated during these difficult times. The continuous manning and operation of the ISS is a credit to all of the partners on this great program.


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