Ultra-violet nightglow spectrum from 1900 Å to 3400 Å |
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| Authors: | J Cohen-Sabban A Vuillemin |
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| Institution: | (1) Laboratoire d'Astronomie Spatiale du C.N.R.S., Marseille, France |
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| Abstract: | Two spectra of the ultra-violet nightglow from 1900 Å to 3400 Å have been recorded by a fast wide-field spectrograph during balloon flights from Aire sur Adour, France on 15 September, 1969 and on 5 October, 1970. These two spectra are composed of theOi line at 2972 Å, of the molecular oxygen Herzberg band systemA
3 
u
+
 X
3
g
–
and of a molecular band system that seems to belong to the NO  SystemX
2   C
2
X
+, situated at 1991 ű4 Å, 2060 ű4 Å and 2136 ű4 Å. Around 2540 Å, there is absorption by ozone at the altitudes at which the spectra were recorded (35 km and 40 km). We present our calculated value of ozone absorption at 35 km, and the zenith-horizon variation of the nightglow emission. |
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