Cleanliness Level

Cleanliness level refers to the degree of cleanliness required for a spacecraft or space equipment to function properly and avoid contamination of the space environment. It involves the control and monitoring of particulate and molecular contamination, such as dust, microbes, and outgassing from materials. The cleanliness level is determined by the mission requirements and the sensitivity of the equipment. The level is measured using various techniques, including particle counting, surface sampling, and chemical analysis. The cleanliness level is maintained through the use of cleanrooms, specialized cleaning procedures, and protective clothing for personnel. Failure to maintain the required cleanliness level can result in equipment malfunction, mission failure, or contamination of the space environment.
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