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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Volume 8, issue 4 | Copyright

Special issue: Atmospheric limb imaging with GLORIA

Atmos. Meas. Tech., 8, 1773-1787, 2015
https://doi.org/10.5194/amt-8-1773-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 16 Apr 2015

Research article | 16 Apr 2015

The mechanical and thermal setup of the GLORIA spectrometer

C. Piesch1, C. Sartorius1, F. Friedl-Vallon1, T. Gulde1, S. Heger1, E. Kretschmer1, G. Maucher1, H. Nordmeyer1, J. Barthel2, A. Ebersoldt3, F. Graf1,*, F. Hase1, A. Kleinert1, T. Neubert4, and H. J. Schillings5 C. Piesch et al.
  • 1Institut für Meteorologie und Klimaforschung, Karlsruher Institut für Technologie, Karlsruhe, Germany
  • 2Institut für Energie und Klimaforschung – Stratosphäre, Forschungszentrum Jülich, Jülich, Germany
  • 3Institut für Prozessdatenverarbeitung und Elektronik, Karlsruher Institut für Technologie, Karlsruhe, Germany
  • 4Zentralinstitut für Engineering, Elektronik und Analytik – Systeme der Elektronik, Forschungszentrum Jülich, Jülich, Germany
  • 5Zentralinstitut für Engineering, Elektronik und Analytik – Engineering und Technologie, Forschungszentrum Jülich, Jülich, Germany
  • *now at: Deutsches SOFIA Institut, Universität Stuttgart, Stuttgart, Germany

Abstract. The novel airborne Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) measures infrared emission of atmospheric trace constituents. GLORIA comprises a cooled imaging Fourier transform spectrometer, which is operated in unpressurized aircraft compartments at ambient temperature. The whole spectrometer is pointed by the gimbal towards the atmospheric target. In order to reach the required sensitivity for atmospheric emission measurements, the spectrometer optics needs to operate at a temperature below 220 K. A lightweight and compact design is mandatory due to limited space and high agility requirements. The cooled optical system needs to withstand high pressure and temperature gradients, humidity, and vibrations. A new cooling system based on carbon dioxide and liquid nitrogen combined with high-performance insulation has been developed to meet the mechanical, thermal, and logistical demands. The challenging mechanical and spatial requirements lead to the development of a novel rigid linear slide design in order to achieve the large optical path difference for high spectral resolution. This paper describes the mechanical and thermal setup of GLORIA and presents the performance results on two different research aircrafts.

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The paper shows the design and the technics of the GLORIA spectrometer, the dedicated cooling system, and the performance during operation on HALO aircraft.
The paper shows the design and the technics of the GLORIA spectrometer, the dedicated cooling...
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