Observations of infrared emission from CO2, O2 and NO established that photochemical and dynamic activity controls the structure of the upper atmosphere of Venus, but were unable to identify the altitude of the emission. But it is reported here that day-side CO2 emission extends from 90–120 km altitude, with a peak at ∼115 km. Night-side O2 emission peaks at 96 km and is visible over the range 95–100 km.
- P. Drossart
- G. Piccioni
- Bernd Ulmer
