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In this paper we shall present the interaction mechanisms between the ISS and the surrounding plasma and give an overview of the PIM components. PIM predictions are compared with available data followed by a discussion of the variability of plasma parameters and the conductive area on the ISS.

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The International Space Station (ISS) is scheduled to remain in orbit for a decade. Over its lifetime, the ISS has been and will continue to be exposed to a variety of natural and induced space environments effects. For the ISS to continue fulfilling its mission as an on-orbit science platform, these effects have to be assessed, monitored, and addressed via design or operational mitigation. For the ISS Program, the Environments team works to address these space environments effects. The Environments group is divided into the following space environments disciplines: external contamination, ionizing radiation, neutral atmosphere and solar ultraviolet radiation, plasma effects, and acoustics. This paper discusses some of the activities conducted by the Environments group to support ISS operations and ensure that the vehicle performs well over time. These activities include efforts in the following areas: imaging assessment, venting and thruster operation effects, optical property degradation assessments, effects on science operations, ionospheric plasma charging effects, ionizing radiation effects, and noise control in habitable areas. The lessons learned and processes developed for ISS are applicable to the design, assembly, and operations of long-duration space systems including new space station designs and missions to the Moon and Mars.