Silicon carbide pointing mirror and telescope for the Geostationary Imaging Fourier Transform Spectrometer (GIFTS)

Details Silicon carbide pointing mirror and telescope for the Geostationary Imaging Fourier Transform Spectrometer (GIFTS) Silicon carbide pointing mirror and telescope for the Geostationary Imaging Fourier Transform Spectrometer (GIFTS)

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005spie.5868...16s&link_type=abstract

Optical Materials and Structures Technologies II. Edited by Goodman, William A. Proceedings of the SPIE, Volume 5868, pp. 16-

Computer Science

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SSG Precision Optronics, Inc. has delivered a silicon carbide (SiC) pointing mirror and telescope for NASA's Geostationary Imaging Fourier Transform Spectrometer (GIFTS) project. The 28 x 45 cm SiC pointing mirror is part of SSG's two-axis gimbaled mirror assembly that will provide object-space pointing and jitter control. The 24 cm aperture telescope is an off-axis afocal three mirror anastigmat that is the collection aperture for the GIFTS instrument. Silicon carbide was selected for the GIFTS pointing mirror and telescope in order to minimize weight, provide athermal optical performance from room temperature to 190 Kelvin, and maintain image quality and line-of-sight stability in the presence of partial or full solar loading (minimizing solar outages). Both subsystems were successfully designed, fabricated, and subjected to testing prior to being delivered to Utah State University's Space Dynamics Laboratory for integration. This paper describes the pointing mirror and telescope design and hardware results.

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