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Proceedings Paper

Compact calibration source for thermal infrared Fourier-transform spectrometer
Author(s): Alexey Shakun; Fedor Martynovich; Nikolay Ignatiev; Alessandro Maturilli; Aleksandr Santos-Skripko; Vladimir Savosin; Igor Stupin; Gabriele Arnold; Alexei Grigoriev; Oleg Korablev
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Paper Abstract

Infrared Fourier-transform spectrometers (FTIR) onboard of the planetary missions are commonly used for the thermal sounding of the atmosphere and retrieval of aerosol profiles. To derive a calibrated spectrum of the target source, one needs three separate measurements: the target source itself and two calibration measurements of sources with known emissivity and temperature. An overview of the design of a compact in-built calibration source (a blackbody) emitting at 210-330 K for a spaceborne FTIR instrument is presented. Mechanically it is an aluminum structure matching the aperture of the instrument. The emissivity depends on its surface relief and finish. Four different types of surface shape are considered. The best-achieved emissivity is better than 0.99 (at 15 μm). The optimal placement of heaters allowing for minimal thermal non-uniformity (0.1 K) across the aperture is found. The accuracy of the thermal control is also ~0.1 K. We discuss the thermal control system and its characteristics (accuracy and drift). The proposed design accounts for a minimum mass applicable to the space instrumentation. For a one-inch aperture, the mass is 0.12 kg. The expected accuracy of the instrument calibrated with the designed blackbody is estimated.

Paper Details

Date Published: 9 September 2019
PDF: 6 pages
Proc. SPIE 11128, Infrared Remote Sensing and Instrumentation XXVII, 1112803 (9 September 2019);
Show Author Affiliations
Alexey Shakun, Space Research Institute of the RAS (Russian Federation)
Fedor Martynovich, Space Research Institute of the RAS (Russian Federation)
Nikolay Ignatiev, Space Research Institute of the RAS (Russian Federation)
Alessandro Maturilli, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
Aleksandr Santos-Skripko, Space Research Institute of the RAS (Russian Federation)
Vladimir Savosin, Space Research Institute of the RAS (Russian Federation)
Igor Stupin, Space Research Institute of the RAS (Russian Federation)
Gabriele Arnold, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
Alexei Grigoriev, Space Research Institute of the RAS (Russian Federation)
Oleg Korablev, Space Research Institute of the RAS (Russian Federation)


Published in SPIE Proceedings Vol. 11128:
Infrared Remote Sensing and Instrumentation XXVII
Marija Strojnik; Gabriele E. Arnold, Editor(s)

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