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  • 1
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    Preliminary design of an Orbiter/IUS separation sequence (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: An orbiter/IUS separation sequence to satisfy the assumed requirements of Shuttle Flight 8 was defined for the purpose of gaining an insight into the flight design software requirements. The key to economical and effective flight design for orbiter/IUS proximity operations is considered to be the capability for rapid and accurate generation of graphical displays that will facilitate not only decision making on the part of the designer, but also lucid documentation of rationale and the resulting design features. The data indicate that (1) an OMS burn is required to attain the necessary velocity without subjecting the IUS and its payload to undue plume impingement, and (2) a departure trajectory that places the orbiter above and behind the IUS at SRM ignition time is preferred over the alternative which would place it below and ahead.
    Keywords: SPACE TRANSPORTATION
    Type: NASA-CR-151696 , TRW-28415-H006-RO-00
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    HP-9810A calculator programs for plotting the 2-dimensional motion of cyclindrical payloads relative to the shuttle orbiter (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The HP-9810A calculator programs described provide the capability to generate HP-9862A plotter displays which depict the apparent motion of a free-flying cyclindrical payload relative to the shuttle orbiter body axes by projecting the payload geometry into the orbiter plane of symmetry at regular time intervals.
    Keywords: SPACE TRANSPORTATION
    Type: NASA-CR-150918 , TRW-28415-H003-RO-00
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Engineering description of the OMS/RCS/DAP modes used in the HP-9825A High Fidelity Relative Motion Program (HFRMP) (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Simplified mathematical models are reported for the space shuttle's Orbital Maneuvering System (OMS), Reaction Control System (RCS), and on-orbit Digital Autopilot (DAP) that have been incorporated in the High-Fidelity Relative Motion Program (HFRMP) for the HP-9825A desk-top calculator. Comparisons were made between data generated by the HFRMP and by the Space Shuttle Functional Simulator (SSFS), which models the cited shuttle systems in much greater detail. These data include propellant requirements for representative translational maneuvers, rotational maneuvers, and attitude maintenance options. Also included are data relating to on-orbit trajectory deviations induced by RCS translational cross coupling. Potential close-range stationkeeping problems that are suggested by HFRMP simulations of 80 millisecond (as opposed to 40 millisecond) DAP cycle effects are described. The principal function of the HFRMP is to serve as a flight design tool in the area of proximity operations.
    Keywords: SPACE TRANSPORTATION
    Type: NASA-CR-151855 , TRW-28415-H009-RO-00
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Concepts and requirements for shuttle/payload orbital operations of the space transportation system (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The results of studies and software development activities are summarized. Technical reports and memoranda are presented in a graphical history of contract activities and the expenditure of engineering manhours. Major topics and activities are: (1) flight phase standardization; (2) flight profile standardization; (3) maneuver targeting for solid rocket motors; (4) relative motion and RCS (Reaction Control System) jet flowfield plotting programs; (5) on-orbit aerodynamic models; (6) terminal approach strategy for payload retrieval/docking; (7) proximity navigation; and (8) desk-top flight simulator for proximity operations. A list of recommendations is also presented.
    Keywords: SPACE TRANSPORTATION
    Type: NASA-CR-151808 , TRW-28415-H008-RO-00
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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