Articles | Volume 13, issue 5
Atmos. Meas. Tech., 13, 2711–2731, 2020
https://doi.org/10.5194/amt-13-2711-2020
Atmos. Meas. Tech., 13, 2711–2731, 2020
https://doi.org/10.5194/amt-13-2711-2020

Research article 27 May 2020

Research article | 27 May 2020

Calibration of an airborne HOx instrument using the All Pressure Altitude-based Calibrator for HOx Experimentation (APACHE)

Daniel Marno et al.

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Short summary
In this study, a calibration device for OH and HO2 instruments is characterized at pressures of 275 to 1000 mbar, allowing instrument pressure sensitivity to be quantified to an accuracy of 22 % (1σ). Computational fluid dynamic simulations supporting the understanding of interactions between generated HOx and the instrument inlet led to enhanced determination of factors affecting instrument sensitivity.