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NASA NTRS · 20240010097

Characterizing Gravity Sag at Cryogenic Temperatures

Tomasz Lis·H Phil Stahl·Ron Eng

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Tomasz Lis, H Phil Stahl, Ron Eng. Characterizing Gravity Sag at Cryogenic Temperatures. https://ntrs.nasa.gov/citations/20240010097

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Multiple Methods of Determining the Gravity-Sag of Light-Weighted Optics

Characterizing Gravity-sag (G-sag) is an essential part of developing a large space-based optic. A method to back out gravity sag of a light-weighted optic using a CGH will be demonstrated. The results from the G-sag CGH determination is compared to the G-sag and Zero-G figure obtained during horizontal G-sag testing. The results from the CGH testing are also compared to the G-sag figure determined from modeling.

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