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Inter-comparison of stratospheric O<sub>3</sub> and NO<sub>2</sub> abundances retrieved from balloon borne direct sun observations and Envisat/SCIAMACHY limb measurements

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Fig. 1. Schematic drawing of the presented comparison and validation strategy. SCIAMACHY observations are conducted at time t 0 and location x 0
Fig. 2. Slant Column Densities of O 3 (panels a and b) and NO 2 (panels c and d) retrieved from LPMA (red triangles) and DOAS (black boxes) direct solar spectra measured at Kiruna on 23 March 2003, during balloon ascent (panels a and c) and sunset (panels
Table 1 summarizes the geophysical conditions of the bal- bal-loon flights chosen for the comparison of the LPMA/DOAS O 3 and NO 2 SCDs
Fig. 3. Histogram of the relative deviations between O 3 SCDs re- re-trieved by DOAS and LPMA, i.e
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