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Fig. A.4

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Quality control plot for a fringe track (here observation 2009-12-02/01:50:44). From top to bottom, left to right: group delay plot, coherent image of the target and the calibrator and (small plots) cuts through the spectrum of the target (black), calibrator (grey) and mask (green) at two different wavelength position. Bottom row: raw spectrum of the target showing the ozone criterion and calibrated spectrum of the target. The MIDI pixel scale in the employed mode is /pixel. See text for details.

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