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Requirements, Resource Planning and Management for Decrewing/Recrewing Scenarios of the International Space Station

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Requirements, Resource Planning and Management for Decrewing/Recrewing Scenarios of the International Space Station Requirements, Resource Planning and Management for Decrewing/Recrewing Scenarios of the International Space Station David A. Bach [email protected] Barrios Technology, Inc. NASA – Johnson Space Center TOPICS COVERED • August 2011 Decrewing Background and History • Increment Support • Priority Integration • Recommendations and Lessons Learned 2 BACKGROUND • On August 24, 2011, the propulsion unit of the Soyuz-U rocket carrying 44 Progress (44P) failed. The rocket and cargo was lost. • The failure occurred, five months into the six month Expedition 27/28 Mission. • No crew or ground Expedition 28 Crew personnel were injured. 3 WHAT HAPPENED • Subsequent Russian launches using the Soyuz rocket (-U and -FG series) were suspended pending analysis and Russian Commission results. • The two Soyuz vehicles docked to ISS for the Expedition 28 crew were unaffected by the failure of 44P. Launch of 43P - June 21, 2011 4 5 PLANNED & EXECUTED FLIGHT PROGRAMS Baselined Flight Program / Port Utilization Plan As Flown Post-44P Incident Flight Program / Port Utilization Plan 6 DECREW ASSESSMENT TEAMS • Joint Operations Panel established with Splinter teams to assess decrewing, sustained uncrewed operations, and subsequent recrewing of the ISS • Splinters were chaired by various ISSP teams 26S departs the ISS on September 16, 2011. Expedition 29 begins with only 3 crew members onboard for 61 days (four times longer than originally planned). 7 ASSESSMENT GUIDELINES • Existing ISS Program and Flight Rule documentation was used by the Splinters in developing crew and ground actions. Fossum works with Robonaut 2 in the Destiny laboratory . Fossum and Furukawa performed checkout and operations with R2. 8 VEHICLE MANIFEST & CONSUMABLES SPLINTER • ISSP Representatives chaired the Vehicle Manifest and Consumables splinter. • Splinter’s two main goals were: 1. Review trash projected to be on the ISS at the time of decrewing, and develop mitigation plans if any trash posed risks to a decrewed ISS, 2. Identify any hardware or Expedition 29 Flight Engineer Furukawa consumables that would need to amongst stowage in the PMM be manifested on the vehicle that recrewed ISS. 9 WASTE DISPOSAL PLANNING • Manifest Splinter Team Orbital Compartment [БО] identified high priority Descent Module [CA] items that needed to be Instrumentation and Propulsion Module [ПАО] disposed of on 42P. • Items generated between 42P departure and 29S docked to the Rassvet Mini-Research Module 1 decrewing would require (MRM1) in foreground, 47P in background docked to the Functional Cargo Block(FGB). coordination for “long term” stowage on ISS or for disposal in the БО of 27S. 42P departing the ISS on October 29, 2011. 42P was the last disposal vehicle prior to the decrewing decision to be made based on 28S arrival, scheduled for November 16, 2011. 10 CONSUMABLES PLANNING – USED Analysis of ISS consumables was performed for both Short and Long Term decrewing and for two categories of consumables: 1. Consumables used throughout the decrewed phase or prior to recrewing, . Propellant (required to maintain vehicle altitude, attitude, velocity, and perform Debris Avoidance Maneuvers), View from the Cupola across the Unity Node 1 to the Quest Airlock. Three of five High Pressure . Nitrogen (lost through tank and Gas Tanks and the Starboard Solar Arrays are in ISS stack leakage rates), view. Oxygen (lost through tank and ISS stack leakage rates) 11 CONSUMABLES PLANNING – EXPIRING 2. Consumables not used during decrew phase, however may expire prior to recrew, . Water, . Water (liquid) Containers (EДВs and CWCs), CWC Water Stowage bags . Recycle Filter Tank Assemblies and Advanced Recycle Filter Tank Assemblies, . Food, . Crew Provisions, . Waste Hardware (Solid Waste Containers, Filter Inserts, Toilet Inserts). Stack of EДВs in Russian Segment 12 DECREW / RECREW CONFIGURATION • Hardware required for recrewing the ISS would be flown with the new crew, on a vehicle arriving close to their recrewing time, available through appropriate stowage locations. – Manifest updates would be addressed as required and based on decrewing duration. • The different modules and systems were configured keeping to the established Uncrewed Priorities to enable for a recrewing, continued science during a decrewed phase, Expedition 29 Commander Mike Fossum in and maintaining sufficient the LAB installing the Secondary Power redundancies. Distribution Assembly Jumper. The SPDA jumper would provide a redundant power path should it be needed during a decrewed ISS phase. 13 PRIORITIZATION OF TASKS • Decrewing requirements were identified by the JOP teams, and through the nominal process, integrated to the standard Increment Requirements documents. • Through the execution of the priorities, Expedition 29 was able to both prepare Fossum installing the Advanced Recycle Filter Tank for a potential decrewing, Assembly on Oct 10, 2011. The priority for while maintaining crew and checkout of the ARFTA was elevated following the 44P accident. vehicle health, and completing utilization tasks. 14 RETURN TO FULL CREW COMPLEMENT 28S successfully docked to the ISS on Nov 16, 2011. 29S arrived on Dec 23, 2011, bringing the ISS to its nominal The six crewmembers had 4.5 crew days together prior 6-crew compliment again. 28S undocked on April 27, 2012. to 27S undocking on Nov 22, 2011. • Following the successful launching and docking of both 45P and 28S, the ISS teams stood down from further decrewing activities. • The 6-crew stage after 28S arrival lasted 4.5 days, followed by one month of 3-crew operations prior to 29S arrival in December. • The crews were able to meet the high priority ISSP objectives, including performing an average of more than 35 hrs per week utilization over both Increments. 15 Thank you. Questions? REQUIREMENTS, RESOURCE PLANNING AND MANAGEMENT FOR DECREWING/RECREWING SCENARIOS OF THE INTERNATIONAL SPACE STATION David A. Bach (1), Susan N. Brand (2), Pete Hasbrook (3) (1)Barrios Technology, LTD. NASA-JSC. Mail Code OP/MAPI, 2101 NASA Parkway, Houston, TX 77058, USA Email: [email protected] (2)NASA-JSC. Mail Code OC3, 2101 NASA Parkway, Houston, TX 77058, USA Email: [email protected] (3)NASA-JSC. Mail Code OZ12, 2101 NASA Parkway, Houston, TX 77058, USA Email: [email protected] 16 .
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