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A Study of Lunar Regolith Obtained during the Apollo and Luna Space Programs Based on Principal Component Analysis

AEROSPACE(2024)

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Abstract
In this study, a modern principal component analysis (PCA) of the chemical properties of lunar soils was conducted. American and Soviet results acquired during the Apollo and Luna missions, respectively, were analyzed and compared. The chemical composition of the lunar soil was the focus of our analysis, the main aim of which was to assess any possible differences between the results provided by the missions in question. The results were visualized in two- and three-dimensional spaces. The use of PCA virtual variables enabled the chemical composition of the lunar soil to be fully visualized-something impossible to achieve using traditional techniques-and key similarities and differences among the properties of the lunar soil samples were determined. The sources of any differences were then conceptualized. The work reported in this paper offers new directions for future studies, especially research into the design of new lunar soil simulants for lunar construction and civil engineering programs.
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Key words
lunar regolith,Apollo space program,Luna space program,PCA analysis
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