Fig. 25
Zooms on the UVES altitude profile from method 3 shown in Fig. 24. The UVES oxygen spectrum at arbitrary scale is shown. The three oxygen bands are clearly detected. Note that we were unable to calculate the core of the oxygen line for the A-band because the signal in the line core is too weak. The sodium layer is not detected. Water-vapour absorption is too weak in the Na I region to appear above 19 km.
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