Articles | Volume 13, issue 7
Research article
23 Jul 2020
Research article |  | 23 Jul 2020

Recommendations for spectral fitting of SO2 from miniature multi-axis differential optical absorption spectroscopy (MAX-DOAS) measurements

Zoë Y. W. Davis and Robert McLaren

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Cited articles

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Short summary
MAX-DOAS is a technique that can be used to measure pollutant concentrations and vertical profiles in the atmosphere via remote sensing of sky-scattered light with a telescope. Measuring SO2 is particularly challenging because of low light intensities in regions where SO2 absorbs solar radiation. Here, we performed experiments that document inaccuracies in these measurements as a function of spectral fitting windows. We provide recommendations for measuring SO2 with greater accuracy.