NASA LogoNTRSNTRS - NASA Technical Reports ServerSearchmore_vertCollectionsAboutNewsHelpLogin Back to ResultsAlternate assembly sequence databook for the Tier 2 Bus-1 option of the International Space StationThe JSC International Space Station program office requested that SSB prepare a databook to document the alternate space station assembly sequence known as Tier 2, which assumes that the Russian participation has been eliminated and that the functions that were supplied by the Russians (propulsion, resupply, initial attitude control, communications, etc.) are now supplied by the U.S. Tier 2 utilizes the Lockheed Bus-l to replace much of the missing Russian functionality. The space station at each stage of its buildup during the Tier 2 assembly sequence is characterized in terms of of properties, functionality, resource balances, operations, logistics, attitude control, microgravity environment and propellant usage. The assembly sequence as analyzed was defined by JSC as a first iteration, with subsequent iterations required to address some of the issues that the analysis in this databook identified. Several significant issues were identified, including: less than desirable orbit lifetimes, shortage of EVA, large flight attitudes, poor microgravity environments, and reboost propellant shortages. Many of these issues can be resolved but at the cost of possible baseline modifications and revisions in the proposed Tier 2 assembly sequence.Document ID19960002338Acquisition SourceLegacy CDMSDocument TypeTechnical Memorandum (TM)AuthorsBrewer, L. M.*(NASA Langley Research Center Hampton, VA, United States)*Cirillo, W. M.*(NASA Langley Research Center Hampton, VA, United States)*Cruz, J. N.*(NASA Langley Research Center Hampton, VA, United States)*Hall, J. B.*(NASA Langley Research Center Hampton, VA, United States)*Troutman, P. A.*(NASA Langley Research Center Hampton, VA, United States)*Monell, D. W.*(NASA Langley Research Center Hampton, VA, United States)*Garn, M. A.*(Analytical Mechanics Associates, Inc. Hampton, VA., United States)*Heck, M. L.*(Analytical Mechanics Associates, Inc. Hampton, VA., United States)*Kumar, R. R.*(Analytical Mechanics Associates, Inc. Hampton, VA., United States)*Llewellyn, C. P.*(Analytical Mechanics Associates, Inc. Hampton, VA., United States)*Date AcquiredSeptember 6, 2013Publication DateAugust 1, 1995Subject CategorySpacecraft Design, Testing And PerformanceReport/Patent NumberNASA-TM-110198NAS 1.15:110198Accession Number96N12346Funding Number(s)PROJECT: RTOP 478-87-00-01Distribution LimitsPublicCopyrightWork of the US Gov. Public Use Permitted.Available DownloadsNameType19960002338.pdfSTIcloud_downloadcontent_copyvisibilityRelated RecordsThere are no records associated with this record.visibility_offNo Preview Available
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