Balloon-borne In-Situ Measurements of ClO and ClONO2 in the late 2010/2011 Arctic Polar Vortex: instrument Calibration and Results - Stroh, F.; Heinecke, F.; Tan, V.; Afchine, A.; Barthel, J.; Engel, A.; Grooß, J.-U.; von Hobe, M.; Richter, A.; Schönfeld, A.; Suminska, O. (AGU, 2011)