Articles | Volume 9, issue 10
https://doi.org/10.5194/amt-9-5135-2016
https://doi.org/10.5194/amt-9-5135-2016
Research article
 | 
20 Oct 2016
Research article |  | 20 Oct 2016

Thermodynamic correction of particle concentrations measured by underwing probes on fast-flying aircraft

Ralf Weigel, Peter Spichtinger, Christoph Mahnke, Marcus Klingebiel, Armin Afchine, Andreas Petzold, Martina Krämer, Anja Costa, Sergej Molleker, Philipp Reutter, Miklós Szakáll, Max Port, Lucas Grulich, Tina Jurkat, Andreas Minikin, and Stephan Borrmann

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Short summary
The subject of our study concerns measurements with optical array probes (OAPs) on fast-flying aircraft such as the G550 (HALO or HIAPER). At up to Mach 0.7 the effect of air compression upstream of underwing-mounted instruments and particles' inertia need consideration for determining ambient particle concentrations. Compared to conventional practices the introduced correction procedure eliminates ambiguities and exhibits consistency over flight speeds between 50 and 250 m s.