Mr. Ryan C. Hoffman Profile

Ryan C. Hoffman

at Air Force Research Lab

SPIE Involvement:

Author

Publications (5)

Proceedings Article | 12 April 2021 Presentation + Paper

Solar panel coverglass degradation due to the simulated GEO environment exposure

Elena Plis, Vanessa Murray, Daniel Engelhart, Karin Fulford, Alexey Sokolovskiy, Dale Ferguson, Ryan Hoffman

Proceedings Volume 11727, 117270W (2021) https://doi.org/10.1117/12.2588655

KEYWORDS: Solar cells, Space operations, Satellites, Electrons, Transmittance, Plasma

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Proceedings Article | 12 April 2021 Presentation + Paper

Space weathering of solar array coverglasses

Elena Plis, Karin Fulford, Daniel Engelhart, Vanessa Murray, Dale Ferguson, Ryan Hoffmann

Proceedings Volume 11755, 117550Q (2021) https://doi.org/10.1117/12.2585306

KEYWORDS: Satellites, Solar energy, Global Positioning System, Solar radiation, Solar cells, Electrons, Contamination, Telescopes, Space operations, Silica

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Proceedings Article | 9 September 2019 Presentation + Paper

Understanding optical changes in on-orbit spacecraft materials

Jacqueline Reyes, Benjamin Miller, Elena Plis, Dale Ferguson, Ryan Hoffmann, Heather Cowardin, Moriba Jah, Daniel Engelhart

Proceedings Volume 11127, 111270I (2019) https://doi.org/10.1117/12.2528926

KEYWORDS: Reflectivity, Electrons, Space operations, Bidirectional reflectance transmission function, Positron emission tomography, Aluminum, Germanium, Satellites, Reflectance spectroscopy, Coating

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