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
Received: 15 May 2013 – Discussion started: 14 Jun 2013
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.
Revised: 29 Oct 2013 – Accepted: 12 Nov 2013 – Published: 06 Jan 2014
Monte, C., Gutschwager, B., Adibekyan, A., Kehrt, M., Ebersoldt, A., Olschewski, F., and Hollandt, J.: Radiometric calibration of the in-flight blackbody calibration system of the GLORIA interferometer, Atmos. Meas. Tech., 7, 13-27, doi:10.5194/amt-7-13-2014, 2014.