Identification of the v3 vibration-rotation band of CF4 in balloon-borne infrared solar spectra

Infrared solar spectra in the 850 to 1350 cm−1 region, at 0.02 cm−1 resolution, were obtained during a balloon flight made on 27 October 1978 from Alamogordo, New Mexico. Analysis of the 1275–1290 cm−1 region indicates that the atmospheric absorption lines of CH4, N2O, H2O, HNO3 and CO2 near 1283 cm−1 are superimposed on a broader absorption feature which we interpret as due to the v3 band of CF4. Fine structure of CF4 is also identified. Preliminary estimates from the sunset spectra show approximately 75 pptv CF4 near 25 km.