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The presence of several atomic species in the LEO (Low Earth Orbits) could be considered one of the reasons for the degradation of the surfaces exposed to the Space Environment.At an average height of 400Km (the altitude of International Space Station), the concentration of the main atomic species during the high sun activity are: 1.5×109cm-3 for atomic oxygen (AO), 1.6×108cm-3 for molecular nitrogen...
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