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Fig. 15 | Earth, Planets and Space

Fig. 15

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. 15

Observed spectra obtained by HIPWAC on May 19–22, 2012 at a 33SLT3 and b 67NLT0. Upper panels in a and b show the observed spectrum (blue), a priori spectrum (black), and retrieved spectrum (red). Lower panels in a and b show the residuals of the observed spectrum relative to the retrieved spectrum. The noise levels are a 0.6 erg/s/cm2/sr/cm−1 (integration time: 100 min on 19–20 May) and b 1.9 erg/s/cm2/sr/cm−1 (integration time: 30 min on 22 May). A priori profiles are based on VIRAex for the temperature and 0 m/s for the wind velocity at all altitudes

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