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Fig. 17


Spectral fit of the SO2 doublet observed at 529.7 cm-1 on October 4, 19:40 UT (maximum SO2 area) Thick black line: TEXES data; thin black line: Models (nominal thermal profile, thin lines): SO2 = 50 ppm, constant with height (black); SO2 = 120 ppb + cutoff (green); SO2 = 180 ppb + cutoff (red); SO2 = 250 ppb + cutoff (blue). The cutoff is located at 67 km (T = 220 K).

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