Need for Commercial Cargo to ISS

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Need for Commercial Cargo to ISS

• William Gerstenmaier
• NASA Associate Administrator
• for Space Operations
• FAA Commercial Space Transportation Advisory
  Council
• May 18, 2007

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ISS Cargo Supply Strategy

• NASA is developing an ISS Cargo Supply Strategy
  that uses a mixed fleet (ATV, HTV, Progresses and
  US domestic cargo service providers).
• Strategy requires purchase of domestic delivery
  services as soon as available.
• International Partner barters will also be used
  as identified in the original ISS agreements.
• Purchase of Russian cargo delivery services will
  bridge the gap between Shuttle and the new US
  domestic cargo service providers.
• Russian services are currently the only other
  proven upmass capability.
• The Russian services that have been procured are
  the minimum needed for ISS survival commercial
  services are projected to be required in 2010.
• Once US commercial services are available, no
  other Russian cargo delivery services will be
  procured.

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ISS Cargo Requirements Assessment

• Initial Assessment of upmass requirements to
  support life of ISS has been performed.
• Results indicated at least 48.8 metric ton
  shortfall beyond capabilities of
• Shuttle flyout (1321)
• ATV offset (3.4 of 5 flights will be US cargo)
• HTV offset (4.3 of 7 flights will be US cargo)
• Russian procurement (4.2 MT in 10 and 1.4 MT in
  11)
• Absolute minimum needed to ensure ISS survival in
  event of COTS delay.
• Remaining shortfall to be met by US commercial
  services
• Refinement of cargo upmass requirements is
  ongoing.

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ISSP Preparations for Commercial Services

• Finalizing generic visiting vehicle interface
  requirements
• Developing them for use during the COTS Phase I
  process
• More than typical launch vehicle
  requirementsproximity operations, berthing,
  Station arm requirements, hatches, environment,
  etc
• Continuing to evaluate future cargo requirements
• Monitoring system performance (system hardware
  driver).
• Monitoring crew usage (crew supplies driver).
• Analyzing post Shuttle consumable requirements
  (water, gas, and propellant consumption).
• Working with other government agencies who could
  use ISS as a national laboratory (e.g., NIH).
• Initiated planning for commercial cargo services
  procurement
• Evaluating whens the right time to begin formal
  procurement activities
• Weighing different contract structures and
  configurations
• Assessing demonstration criteria for launch
  services and ISS proximity operations

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