Time series of the retrieved line area (red solid line) compared with the measured line area (blue dashed line). Overall, the agreement is good. The small deviations in the line area for some cases (e.g. 24 h since 0 h on August 7 and 8 h since 0 h on August 18) can be traced back to a complex observed line shape, which cannot be reproduced with the parameterized coma model used in this study.