Evaluating different methods for elevation calibration of MAX-DOAS (Multi AXis Differential Optical Absorption Spectroscopy) instruments during the CINDI-2 campaign

• Published in: Atmospheric measurement techniques Vol. 13; no. 2; pp. 685 - 712
• Main Authors: Donner, Sebastian, Kuhn, Jonas, Van Roozendael, Michel, Bais, Alkiviadis, Beirle, Steffen, Bösch, Tim, Bognar, Kristof, Bruchkouski, Ilya, Chan, Ka Lok, Dörner, Steffen, Drosoglou, Theano, Fayt, Caroline, Frieß, Udo, Hendrick, François, Hermans, Christian, Jin, Junli, Li, Ang, Ma, Jianzhong, Peters, Enno, Pinardi, Gaia, Richter, Andreas, Schreier, Stefan F, Seyler, André, Strong, Kimberly, Tirpitz, Jan-Lukas, Wang, Yang, Xie, Pinhua, Xu, Jin, Zhao, Xiaoyi, Wagner, Thomas
• Format: Journal Article
• Language: English
• Published: Katlenburg-Lindau Copernicus GmbH 13.02.2020; Copernicus Publications
• Subjects: Absorption spectroscopy; Albedo; Albedo (solar); Albedo effects; Analytical methods; Calibration; Comparative analysis; Elevation; Evaluation; Field of view; Horizon; Instruments; Instruments (Equipment); Intercomparison; Measuring instruments; Methods; Nitrogen dioxide; Nitrogen oxides; Offsets; Organic chemistry; Spectroscopy; Wavelength
• ISSN: 1867-8548; 1867-1381; 1867-8548
• DOI: 10.5194/amt-13-685-2020

We present different methods for in-field elevation calibration of MAX-DOAS (Multi AXis Differential Optical Absorption Spectroscopy) instruments that were applied and inter-compared during the second Cabauw Intercomparison campaign for Nitrogen Dioxide measuring Instruments (CINDI-2). One necessary prerequisite of consistent MAX-DOAS retrievals is a precise and accurate calibration of the elevation angles of the different measuring systems. Therefore, different methods for this calibration were applied to several instruments during the campaign, and the results were inter-compared.