| タイトル | Some significant considerations in the planning of sortie missions |
| 著者（英） | Loftus, J. P., Jr.; Cour-Palais, B. G.; Moore, J. W.; Lohman, R. L. |
| 著者所属（英） | NASA Headquarters; NASA Johnson Space Center |
| 発行日 | 1980-09-01 |
| 言語 | eng |
| 内容記述 | Opportunities and limitations to be considered in the planning of Space Shuttle/Spacelab sortie missions are discussed. As shown by a simple model of the flow of STS equipment through ground processing and flights under ideal conditions, mission duration is constrained by Orbiter availability, which is determined initially by the Orbiter production schedule and the turnaround time required between missions, and by the usage rate and quantity limitations of mission consumables. Additional considerations affecting mission duration include reductions in crew productivity upon increased mission duration and crew size, spacecraft and experiment degradation, equipment and processing facility cost effectiveness, and requirements for a power extension package, which considerations imply that increased allowable landing weight would make co-manifesting (the combination of Spacelab and deliverable payload missions) more attractive. Advantages related to payload recoverability, human presence, ease of access and the availability of different orbits are also pointed out. |
| NASA分類 | SPACE TRANSPORTATION |
| レポートNO | 81A18414
IAF PAPER 80-IAA-33 |
| 権利 | Copyright |
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