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Earth, Planets and Space
Fig. 5 | Earth, Planets and Space

Fig. 5

From: Evaluation of a method to retrieve temperature and wind velocity profiles of the Venusian nightside mesosphere from mid-infrared CO2 absorption line observed by heterodyne spectroscopy

Fig. 5

Examples of the model spectra synthesized from the temperature profiles of a the cold case (VIRAex − 30 K) and b the warm case (VIRAex + 30 K). Upper panels show the model spectra (blue), a priori spectra (black), and retrieved spectra (red). Lower panels show the residuals between the model and retrieved spectra. Model spectra were generated with the wind velocity profile of + 150 m/s at all altitudes, including white noise with the RMS of 1.0 erg/s/cm2/sr/cm−1. In both, the a priori profiles are VIRAex for the temperature and 0 m/s for the wind velocity at all altitudes

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