Skip to main content
Earth, Planets and Space
Fig. 1 | Earth, Planets and Space

Fig. 1

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. 1

Five model spectra as emulated CO2 absorption line profile. Color lines show the synthesized spectra from the temperature profiles of − 30 K (cold case, blue), − 15 K (semi-cold case, sky blue), + 0 K (VIRAex case, in green), +15 K (semi-warm case, yellow), and + 30 K (warm case, red) cases from VIRAex. For all of these, the wind velocity profiles are set to 0 m/s at all altitudes. White noise with the RMS of 1.0 erg/s/cm2/sr/cm−1 is added. a Black lines show examples of 13 a priori spectra generated from temperature profiles of − 30 ~ + 30 K from VIRAex with 5 K steps at all altitudes. The wind velocity profiles are 0 m/s at all altitudes. b Black lines show examples of 5 a priori spectra generated from the wind velocity profiles of − 200 ~ + 200 m/s at 100-m/s steps at all altitudes. The temperature profiles are VIRAex

Back to article page