Shuttle/Payload Contamination Evaluation (SPACE) Program Improvements

Frank J. Jarossy; Joseph C. Pizzicaroli; Nancy L. Owen

doi:10.1117/12.932009

19 February 1982 Shuttle/Payload Contamination Evaluation (SPACE) Program Improvements

Frank J. Jarossy, Joseph C. Pizzicaroli, Nancy L. Owen

Proceedings Volume 0287, Shuttle Optical Environment; (1982) https://doi.org/10.1117/12.932009
Event: 1981 Technical Symposium East, 1981, Washington, D.C., United States

Abstract

The Space Computer program is a systems level analytical model designed to three-dimensionally synthesize the dynamics of the induced on-orbit molecular contaminant environment of the Shuttle Orbiter (SO), Spacelab (SL), and various payloads. The SPACE code is the first systems level code to consider: 1) detailed spacecraft geometry with surface shadowing; 2) a complex mixture of arbitrary contamination sources including both point sources (RCS engines, overboard vents) and extended sources (surfaces), and; 3) a variety of contamination transport mechanisms including direct source-to-surface mass transfer, and impingement flux from scattering due to intermolecular collisions. Significant improvements to the model have resulted from contract activities with MSFC and JSC. These improvements include: 1) an evaluation of the multiple reflection option to determine the significance of this phenomenon for a typical Shuttle Orbiter/Payload configuration; 2) the design and development of new logic to accumulate predicted deposition levels for consecutive orbital time slices and thus provide the capability for automated full mission simulations; and, 3) the development of a simplified version of the SPACE code (Mini-SPACE) to provide a quick-look analysis capability for mission planning purposes circumventing the complex procedures required to model a configuration and prepare the detailed input data files needed for analysis with SPACE; and 4) an interface with the DISSPLA system utility plot package to provide an enhanced presentation of SPACE output data. This paper provides an overview of SPACE program capabilities, a detailed description of recent improvements, and a summary of the anticipated future activities.

Citation Download Citation

Frank J. Jarossy, Joseph C. Pizzicaroli, and Nancy L. Owen "Shuttle/Payload Contamination Evaluation (SPACE) Program Improvements", Proc. SPIE 0287, Shuttle Optical Environment, (19 February 1982); https://doi.org/10.1117/12.932009

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