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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/amt-2018-269
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-2018-269
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 11 Oct 2018

Research article | 11 Oct 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Measurement Techniques (AMT).

Calibration of a 35-GHz Airborne Cloud Radar: Lessons Learned and Intercomparisons with 94-GHz Cloud Radars

Florian Ewald1, Silke Groß1, Martin Hagen1, Lutz Hirsch2, Julien Delanoë3, and Matthias Bauer-Pfundstein4 Florian Ewald et al.
  • 1Deutsches Zentrum für Luft und Raumfahrt, Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany
  • 2Max Planck Institute for Meteorology, Hamburg, Germany
  • 3LATMOS/UVSQ/IPSL/CNRS, Guyancourt, France
  • 4Metek GmbH, Elmshorn, Germany

Abstract. In this study, we will give an overview of lessons learned during the radiometric calibration of the airborne, high-power Ka-band cloud radar on board the German research aircraft HALO. Within this context, a number of flight experiments over Europe and over the tropical and extra-tropical North-Atlantic have been conducted, where the ocean surface backscatter was used as an external reference reflector. Measurements of signal linearity and signal saturation complement this characterization. To validate the external calibration, joint flights of HALO and the French Falcon 20 aircraft, which was equipped with the RASTA cloud radar at 94GHz and underflights of the spaceborne CloudSat at 94GHz have been conducted. Finally, the influence of different radar wavelengths was explored with numerical studies.

Florian Ewald et al.
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Status: final response (author comments only)
Status: final response (author comments only)
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Florian Ewald et al.
Florian Ewald et al.
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