Mixing ratios of sulfur hexafluoride (SF6) in the upper troposphere

The dataset contains observations of of sulfur hexafluoride (SF6) in the upper troposphere. Measurements were performed with gas chromatopgraphy coupled with electron capture detectors either employing airborne fast in-situ onboard instrumentation or offline post-flight analysis based on airborne flask sample collection. Mixing ratios are reported on the WMO X2014 scale. Accompanying data comprise measurements of maxing ratios of carbon monoxide, nitrous oxide, and ozone. Data were attributed to the upper troposphere (as opposed to the lowermost stratosphere) based on these three compounds as decribed in 
Schuck, T. J., Degen, J., Hintsa, E., Hoor, P., Jesswein, M., Keber, T., Kunkel, D., Moore, F., Obersteiner, F., Rigby, M., Wagenhäuser, T., Western, L. M., Zahn, A., and Engel, A.: The interhemispheric gradient of SF6 in the upper troposphere, EGUsphere [preprint], https://doi.org/10.5194/egusphere-2023-1824, 2023. 
Observations were performed during the following aircraft research missions:
IAGOS-CARIBIC (CARIBIC-2), http://www.caribic-atmospheric.com/ (instrument caribic_lab_GC_ECD)HALO (A-DLR) missions TACTS (2012) and SouthTRAC (2019) (instrument ghost_ecd)NASA Atmospheric Tomography Mission (ATom), https://espo.nasa.gov/atom/content/ATom, (instrument atom_ucats)HIAPER Pole-to-Pole Observations (HIPPO), https://www.eol.ucar.edu/content/about-hippo, (instrument hippo_ucats)