Abstract

Successful completion of many scientific/technical measurements and safe Orbiter/payload operations during Space Shuttle flights requires limitations on the Orbiter-induced molecular and particulate environment. Four orbital flight tests have provided the opportunity to verify the results of efforts to keep the Orbiter contamination levels within defined goals. Contamination measurements were performed using various instruments on the induced environment contamination monitor. Results of these measurements indicate that, with the exception of special circumstances related to the Space Shuttle development, molecular contamination density and deposition as well as particulate contamination generally are within the requirements and are close to predicted levels.

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