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9 August 2016 FIFI-LS diffraction grating vibration on SOFIA
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FIFI-LS (the Field Imaging Far Infrared Line Spectrometer for SOFIA) was successfully commissioned in 2014 during six flights on SOFIA. The observed wavelengths are set by rotating reflective gratings. In flight these gratings and their rotating mechanisms are exposed to vibrations. To quantify these vibrations, an acceleration sensor was placed on the exterior of the instrument. Simultaneously, the angle sensor of the grating was read out to analyze the movement of the grating. Based on this data, lab measurements were conducted to evaluate the effect of the vibrations on the image quality of FIFI-LS. The submitted paper will present the measured data and show the results of the analysis.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Felix Rebell, Simon Beckmann, Aaron Bryant, Sebastian Colditz, Christian Fischer, Fabio Fumi, Rainer Hoenle, Norbert Geis, Christof Iserlohe, Randolf Klein, Alfred Krabbe, Leslie Looney, Albrecht Poglitsch, Walfried Raab, and Maureen Savage "FIFI-LS diffraction grating vibration on SOFIA", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99082D (9 August 2016);


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