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9 September 2019 Two-coordinate pointing and tracking system for an infrared Fourier-transform spectrometer
Alexey Shakun, Andrey Kungurov, Oleg Sazonov, Igor Stupin, Gabriele Arnold, Alexey Grigoriev, Oleg Korablev
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Proceedings Volume 11128, Infrared Remote Sensing and Instrumentation XXVII; 111280H (2019) https://doi.org/10.1117/12.2535444
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States
Abstract
We describe a 1-inch aperture pointing system realized with a rope transmission driven by geared stepper motors for operation at the surface of Mars. The system is intended to serve in the Fourier-transform spectrometer to observe both the sun through the atmosphere and the thermal emission of the atmosphere. The scanner covers a full 2π field of view (the upper hemisphere). The accuracy of 0.1 mrad (~21 arcsec) for the sun tracking is achieved using an automatic control system with an IR array sensor (3232) in the loop. The optics of the pointing system consists of three flat mirrors and a germanium inlet window. The mass of the subsystem does not exceed 0.8 kg. The design accounts for the necessity of dust protection in the Martian environment. The effect of a finite accuracy of the pointing and tracking on the instrument signal to noise ratio is modeled.
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Alexey Shakun, Andrey Kungurov, Oleg Sazonov, Igor Stupin, Gabriele Arnold, Alexey Grigoriev, and Oleg Korablev "Two-coordinate pointing and tracking system for an infrared Fourier-transform spectrometer", Proc. SPIE 11128, Infrared Remote Sensing and Instrumentation XXVII, 111280H (9 September 2019); https://doi.org/10.1117/12.2535444
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KEYWORDS
FT-IR spectroscopy
Infrared spectroscopy
Spectroscopy
Mars
Infrared radiation
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