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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Volume 7, issue 1
Atmos. Meas. Tech., 7, 13–27, 2014
https://doi.org/10.5194/amt-7-13-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Atmospheric limb imaging with GLORIA

Atmos. Meas. Tech., 7, 13–27, 2014
https://doi.org/10.5194/amt-7-13-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 06 Jan 2014

Research article | 06 Jan 2014

Radiometric calibration of the in-flight blackbody calibration system of the GLORIA interferometer

C. Monte1, B. Gutschwager1, A. Adibekyan1, M. Kehrt1, A. Ebersoldt2, F. Olschewski3, and J. Hollandt1 C. Monte et al.
  • 1Physikalisch-Technische Bundesanstalt, Abbestraße 2–12, 10587 Berlin, Germany
  • 2Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
  • 3University of Wuppertal, Atmospheric Physics, 42119 Wuppertal, Germany

Abstract. GLORIA (Gimballed Limb Observer for Radiance Imaging of the Atmosphere) is an airborne, imaging, infrared Fourier transform spectrometer that applies the limb-imaging technique to perform trace gas and temperature measurements in the Earth's atmosphere with three-dimensional resolution. To ensure the traceability of these measurements to the International Temperature Scale and thereby to an absolute radiance scale, GLORIA carries an on-board calibration system. Basically, it consists of two identical large-area and high-emissivity infrared radiators, which can be continuously and independently operated at two adjustable temperatures in a range from −50 °C to 0 °C during flight. Here we describe the radiometric and thermometric characterization and calibration of the in-flight calibration system at the Reduced Background Calibration Facility of the Physikalisch-Technische Bundesanstalt. This was performed with a standard uncertainty of less than 110 mK. Extensive investigations of the system concerning its absolute radiation temperature and spectral radiance, its temperature homogeneity and its short- and long-term stability are discussed. The traceability chain of these measurements is presented.

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